JPH0432489Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention has a strong holding force against pull-out for base materials with low elasticity such as foamed concrete, and also has a strong hold on the nail head in the axial direction after driving. This invention relates to a special nail whose head can be easily removed by applying a right-angled force.

(Prior art) Conventionally, nails with strong holding power against pull-out for base materials with low elasticity, such as foamed concrete, have been divided into multiple nail legs, and after driving, the nail legs are separated from each other at the tip. Those configured so that they are held open from each other at the sides, or whose legs are square shafts,
The shaft side was tapered over almost the entire length.

(Problem that the invention aims to solve) However, in any case, in order to ensure strong holding force against base materials with little elasticity, the length of the leg body driven into the base material must be is required,
Short legs have almost no effect. On the other hand, if it is necessary to remove the nail after completion of driving for repair or other reasons, and it is difficult to pull it out by applying axial force because there is an obstacle to pulling it out above the nail head. By applying force perpendicular to the nail axis from the lateral direction of the head, the nail is removed while being forcibly bent, and unnecessary parts held by the nail are sometimes removed. However, the conventional nails mentioned above cannot have short legs due to the need for holding force, and have to be made long. If you try to remove the nail by just applying it, it will only bend the nail shaft near the head, making it impossible to pull it out or remove it any further, unless you remove the obstruction above the nail head and apply a pulling force in the axial direction. This had the disadvantage that unnecessary parts could not be removed.

This design eliminates the drawbacks of conventional nails, has a strong holding force against pulling out, and allows the head to be easily removed by applying a force perpendicular to the axial direction to the nail head after driving. The purpose is to provide special nails that can.

(Means for Solving the Problem) The technical means of the present invention for solving this technical problem is that the conical depression 2 is formed of an elastic pipe body and has the apex at the base side, extending from the base side to the tip. The head body 4 has a leg body 1 formed over the entire length, a head body 5 and a shaft part 6, and on the outer periphery of the shaft part 6 of the head body 4,
An annular notch recess 7 is provided in the circumferential direction, and a large diameter portion 8 on the side of the head 5 from the notch recess 7 of the shaft 6 has a larger diameter than the inner diameter of the base of the leg 1; The tip side has a small diameter portion 9 having approximately the same diameter as the base inner diameter of the leg body 1.
The base of the leg 1 is externally fitted and fixed to the small diameter portion 9 of the head body 4 so that the end surface of the base of the leg 1 contacts the end surface of the large diameter portion 8 on the notch recess 7 side in an annular manner. It is in the point that it is.

(Function) The leg 1 of this nail is a pipe body with a conical depression 2 with the apex at the base side, so when it is driven into a base material with low elasticity such as foamed concrete, the base material becomes conical. A strong holding force can be obtained by being compressed and held in the recess and by the elastic effect of the leg body 1 made of a pipe body. When it becomes necessary to remove the nail after driving, the shank of the head body 4 can be removed by applying a force acting perpendicularly to the axial direction on the head 5 under conditions in which it is impossible to pull out the nail in the axial direction. 6 has a notched recess 7 in the circumferential direction, and is bent from the notched recess 7, and furthermore, the shaft 6 that receives the leg 1
A break occurs due to the lever action between the head body 4 and the leg body 1, and the head body 4 is separated. When driving, the base side end surface of the leg 1 is located at the large diameter portion 8 closer to the head 5 than the notch recess 7.
Since it is in pressure contact with the end face on the notch recess 7 side and is received there, the force that acts during driving is applied to the notch recess 7.
It can be typed without any problem without affecting.

Therefore, for example, as shown in FIGS. 3 and 4, this special nail can be conveniently used as a tile nail for fixing flat roof tiles 11. That is, Figures 3 to 5
The figure shows the work process for replacing a damaged flat tile 11a when a large number of pentagonal flat tiles 11 arranged in a stacked manner on a roof are fastened using the special nails of the present invention. It shows. First, as shown in FIG. 3, the tip 13 side of an elongated flat tool 12 is inserted under the flat tile 11a, and the special nail holding the flat tile 11a is pushed up several times with the tip 13 of the tool 12 to float it. Furthermore, as shown in FIG. 4, place the tool 12 above the damaged flat tile 11, hook the floating nail head 5 with the tip 13 of the tool 12, and in this state tension the tool 12 toward you. Alternatively, the head body 4 is removed by hitting the cut portion 14 on the base side of the tool 12 with a hammer or the like as shown by arrow a.
After that, all that is required is to remove the damaged flat tile 11a from the roof and insert a new flat tile 11b as shown in FIG. In addition, new flat tiles 11
b may be adhered with adhesive 15 or the like applied to its lower surface.

(Embodiment) The present invention will be described below according to the illustrated embodiment. In FIGS. 1 and 2, 1 is a leg body, which is a cone made of an elastic pipe body, and whose apex is on the base side. A shaped depression 2 is formed by bending from the base side to the tip end.

Reference numeral 4 denotes a head body having a head 5 and a shaft portion 6, and an annular notch recess 7 is provided on the outer periphery of the shaft portion 6 in the circumferential direction. The side of the head 4 from the notch recess 7 of the shaft 6 is a large diameter portion 8 that has a larger diameter than the inner diameter of the base of the leg 1.
The distal end side of the notched recess 7 is a small diameter portion 9 having approximately the same diameter as the inner diameter of the base portion of the leg body 1 .

The base portion of the leg body 1 is fitted onto the small diameter portion 9 of the head body 4, and the leg body The base portion 1 and the small diameter portion 9 are fixed to each other by caulking, welding, brazing, or the like.

(Effects of the invention) The special nail according to this invention has a strong holding power just by driving it into a base material with low elasticity such as foam concrete, and the nail can be removed for repairs etc. after driving is completed. If it becomes necessary to pull out the nail by applying force in the axial direction because there is an obstacle in the upper part of the head 5, it is difficult to pull it out by applying force in the axial direction. By applying a right-angled force, the head body 4 can be easily cut at the notch recess 7 and separated from the leg body 1 and the base material. Therefore, it is possible to remove unnecessary members without destroying the necessary objects present above the head 5.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a perspective view, and FIG. 2 is a side sectional view. Third
Figures 5 through 5 are perspective views for explaining specific usage examples and their effects. 1... Leg body, 2... Cone-shaped depression, 4... Head body,
5...Head, 6...Shaft, 7...Notch recess, 8...
...Large diameter part, 9...Small diameter part.

Claims (1)

[Scope of utility model registration request] A leg body 1 made of an elastic pipe body and having a conical recess 2 with the apex at the base side formed from the base side to the tip, and a head body 4 having a head portion 5 and a shaft portion 6. An annular notch recess 7 is provided in the circumferential direction on the outer periphery of the shaft 6 of the head body 4, and a portion of the shaft 6 closer to the head 5 than the notch recess 7 has a diameter larger than the inner diameter of the base of the leg 1. The distal end side of the notch recess 7 of the shaft portion 6 is a small diameter portion 9 having approximately the same diameter as the base inner diameter of the leg body 1, and the end surface of the base side of the leg body 1 is a notch recess 7 of the large diameter portion 8. The leg body 1 is placed in annular contact with the side end surface.
A special nail characterized in that the base of the nail is externally fitted and fixed to the small diameter part 9 of the head body 4.