JPH08216056A - Nail puller - Google Patents

Abstract

PURPOSE: To provide a nail puller which can pull out a nail smoothly and readily without causing damage to a corrugated plate where the nail was driven. CONSTITUTION: A nail puller main body 1 is connected to a nail puller support member 2 by means of a connecting bolt 3 passed through through holes bored in its short-side end 1f and in the pair of nail-puller mounting pieces 2b of the nail puller support member 2, while the short-side end 1f is fitted into time pair of nail-puller mounting pieces 2b. The corrugated bottom face portion of the nail puller support member 2 is formed to take approximately the same shape as the surface of a corrugated plate 5. To pull out a nail 6 driven into the corrugated plate 5, the handle 1e of the nail puller main body 1 is tilted forward, the end of a nail pulling portion 1b is advanced around the head of the nail 6, and then the handle 1e is pulled upward with the nail 6 facing a V-shaped notch 1a. Then the nail puller main body 1 rotates about the connecting bolt 3, and the nail pulling portion 1b works to pull out the nail 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to nail pulling, and more particularly to an improvement in nail pulling in which the short side is a nail pulling portion and the long side is a gripping portion, and the overall shape is an L shape. .

[0002]

2. Description of the Related Art A conventional nail puller has an L-shape that is short on one side when viewed from the lateral direction and is sufficiently long on the other side as compared with the one side, and the tip of the one side is a scissor-like nailing portion. In general, the other side is a grip portion and the tip thereof is also a nail pulling portion similar to the above.

[0003] In such conventional nail pulling, nails that have been hammered in for joining and integrating a plurality of stacked timbers or attaching a plate to a pillar are pulled out and disassembled. Used for. If you do not reuse the dismantled plate, pillar, etc., it does not cause much problem, but when reusing it, it is necessary to not damage the pillar or plate when pulling out the nails. .

[0004]

If the plate members joined by the nails are flat plates and are relatively hard materials,
Conventional nail removal allows nails to be removed without significantly damaging the surface of the plate material.

However, when the object to be nailed is not flat, for example, a corrugated plate which is widely used as a building element (also referred to as a corrugated plate), conventional nail pulling is used. When you try to pull out a nail, the angled corner of the L-shaped nail puller becomes the fulcrum of the force for pulling out the nail, so the load (stress) concentrates on that corner and deforms the surface of the corrugated plate. As a result, a very unsightly concave portion is formed.

[0006] In particular, when the corrugated board is used as a roofing material, it is common to drive a nail to the peak of the corrugated peaks and valleys. This is because when a nail is hammered into the valley portion of the corrugated plate, most of the rainwater falls along the valley portion, so that the rainwater easily leaks and the nail is hammered into the mountain portion.

In this case, the nail pulling portion (V-shaped notch portion) formed at the tip of the short side of the nail puller is inserted into the neck portion of the nail that has been hit, and then turned so as to raise the handle portion on the long side. Then, the nail pulling portion on the short side rotates around the corner portion as a rotation center, and the nail is pulled out in the arc direction.

However, when the nail nailed to the ridge portion of the corrugated plate is pulled out by the conventional nail pulling method, the pulling load is concentrated on the corner portions forming a right angle of the nail pulling. It will be dented and will leave an unsightly scar on the corrugated board after the nail is pulled out. When reusing this damaged corrugated board, a method of shaping it into its original shape by sheet metal treatment is also tried, but it cannot be restored to the original shape, and the corrugated board has been painted. In some cases, the coating may partly peel off, and it was virtually difficult to restore it to the original state by partially repairing the coating.

The present invention has been made in view of the above circumstances. A first object of the present invention is to easily pull out a nail struck on a corrugated plate without damaging the corrugated plate. It's about providing nail pulls. A second object of the present invention is not only to provide a corrugated plate, but also to provide a nail plate which can easily pull out nails hammered on an ordinary flat plate without damaging the flat plate. It is in.

[0010]

In order to achieve the first object, the present invention has an L-shape having a short one side and a sufficiently long other side as compared with the one side, and a tip portion of the one side. Is a scissor-shaped nail pulling portion, and the other side is a grip portion,
A nail-pulling main body having an insertion hole formed in the vicinity of the base end portion on the one side, a corrugated bottom surface portion whose bottom surface has substantially the same shape as the corrugated surface of a corrugated plate as a building element, and this corrugated bottom surface portion Arranged so as to face the one end side base end of the nail pulling body between the pair of nail pulling attachment members and a pair of nail pulling attachment members that are upright and have through holes formed therein In this state, the pair of nail pulling attachment pieces and a connecting member that is inserted into the through holes formed in the one side base portion and that connects the nail pulling support member to the nail pulling body so as to be rotatable by a predetermined amount. It is characterized by having.

Further, according to the present invention, in order to achieve the first and second objects, the nail pulling main body is used as a normal nail pulling by disengaging the nail pulling support member by releasing the connection by the connecting member. It is characterized in that it is configured to be able to.

Further, a notch for allowing a predetermined amount of rotation of the nail pulling portion of the nail pulling body is formed in the corrugated bottom portion of the nail pulling support member according to the present invention. It is a thing.

[0013]

In the nail puller constructed as described above, the bottom surface of the nail pulling support member has substantially the same shape as the surface of the corrugated plate as a building element, so that the reaction force (load) at the time of pulling out the nail is applied to the corrugated plate. When it acts, the entire bottom surface receives the force, the stress is dispersed, and the deformation and damage of the corrugated plate are prevented.

That is, the scissors-shaped nail-pulling portion of the nail-pulling body is inserted into the neck portion of the nail hit on the plate material or the like to cause the grip portion on the long side to be inserted into the insertion hole of the nail-pulling support member. By rotating the connecting member as a center, the nail can be pulled out with a small force.
The reaction force that should be applied to the corner without directly contacting the corrugated plate with the corner of the nail puller is a connecting member → a pair of nail puller mounting pieces →
Since it is transmitted to the corrugated bottom surface and receives the above-mentioned reaction force at the entire contact surface of the peaks and troughs of the corrugated plate, it is not necessary to give any deformation to the corrugated plate.

[0015]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a front view showing the configuration of an embodiment of nail pulling according to the present invention, FIG. 2 is a right side view of the same embodiment,
FIG. 3 is an enlarged cross-sectional view taken along line XX of FIG. 1, and FIG.
FIG. 5 is an enlarged perspective view showing a state where a nail is pulled out by using the nail puller of the embodiment, FIG. 5 is a front view showing a configuration of a nail pulling support member which is a main part of the embodiment, and FIG. 7 is a plan view of the nail pulling support member shown in FIG. 7, FIG. 7 is a bottom view of the nail pulling support member shown in FIG. 5, and FIG. 8 is a cross-sectional view taken along line YY of FIG.

In these figures, 1 is a nail pulling body, one side (side extending in the horizontal direction in FIG. 1) is short, and the other side (side extending in the vertical direction in FIG. 1) is shorter than the one side. Has a sufficiently long dimension, and one side and the other side are integrally connected to each other at an angle of about 90 °, and viewed from a specific direction (in this embodiment, viewed from the back side). , L-shaped.

As shown in FIG. 3, the tip of one side of the nail pulling body 1 (hereinafter sometimes referred to as the "short side") has a V-shaped tip as shown in FIG. A notch 1a is formed, in other words, a scissor-like nail-pulled portion 1b is formed, and a short-side base end portion 1f is provided in the vicinity thereof as a connecting member to be described later. An insertion hole 1c (see FIG. 3) for inserting the connecting bolt 3 is formed.

Further, a well-known nail-pulling portion 1d is formed at the tip portion (upper end portion in FIG. 1) on the other side of the nail-pulling main body 1 (hereinafter sometimes referred to as "long side"). ,
It is provided in a relationship orthogonal to the nail pulling portion 1b on the short side. Further, the shape of the grip portion 1e is rectangular in cross-sectional shape, more strictly speaking, substantially I-shaped. In other words, the grip portion 1e is thick in the direction along the paper surface of FIG. It is thin in the orthogonal direction. This is to increase the section modulus in the direction of pulling out the nail.

Reference numeral 2 is a nail pulling support member which is an essential part of the present invention, the details of which are shown in FIGS. The bottom surface of the corrugated bottom surface portion 2a of the nail-pulling support member 2 is formed in substantially the same shape as the corrugated surface of the corrugated plate (member indicated by reference numeral 5 in FIG. 4) as a building element,
At two locations near the center of the corrugated bottom surface portion 2a, there are predetermined intervals so as to be parallel to the corrugation, that is, an interval such that the proximal end portion 1f on the short side of the nail pulling body 1 can be fitted with a margin. Then, the two nail-pulling attachment pieces 2b are integrally and integrally connected to each other by welding a separately manufactured piece.

An insertion hole 2c for inserting a connecting bolt 3 as a connecting member, which will be described later, is formed in the middle portion of the nail-pulling attachment piece 2b. Nail pulling support member 2
A trapezoidal notch 2d is formed from one end (the left end in FIG. 6) of the corrugated bottom portion 2b to the vicinity of the center.
However, when rotating around the insertion hole 2c, the corrugated bottom surface 2
It is intended to be able to enter across a.

Reference numeral 3 denotes a connecting bolt, which is a state in which a base end portion 1f on the short side of the nail pulling main body 1 is fitted between two nail pulling attachment pieces 2b, and is attached to each of the base end portion 1f and the nail pulling attachment piece 2b. A connecting nut 4 is screwed into the male screw portion 3a formed on the tip side of the male screw portion 3a which is inserted into the inserted through holes 1c and 2c, and by the connecting bolt 3 and the connecting nut 4, the nail removing main body 1 is connected to each other. As shown by the chain double-dashed line in FIG. 1, the nail pulling support member 2 is connected so as to be rotatable by a predetermined amount.

Next, the operation (action) of this embodiment having such a configuration will be described. For example, shingles (wood)
The description will proceed assuming that the corrugated plate 5 that is struck by the nail 6 on the upper side is to be peeled off for convenience. First, the bottom face of the corrugated bottom face portion 2a of the nail pulling support member 2 according to the present embodiment is placed (abutted) near the nail 6 to be pulled out, and the nail pulling portion 1 on the short side of the nail pulling main body 1 is placed.
The tip of b is made to enter between the neck portion of the nail 6 (the shaft portion of the bolt between the head of the nail 6 and the surface of the corrugated plate 4) so that the head of the nail 6 is a V-shaped notch 1a of the nail pulling portion 1b. The nail pull-out part 1b is pushed in until it reaches the deep part.

In this case, normally, the force is manually pushed in gradually, but if it is not pushed in smoothly, the base end of the nail pulling body 1 is lightly tapped with a tool such as a hammer. At this time, the nail pulling portion 1b of the nail pulling body 1
Is tilted to an appropriate angle within the range indicated by the chain double-dashed line in FIG. 1 and pushed into the neck.

Next, the grip portion 1e of the nail pulling body 1 is gripped, and the nail pulling body 1 is pushed clockwise in FIG. 4 with the connecting bolt 3 as the center of rotation. Then, the grip 1e
The nail pulling part 1b, which is integral with, also rotates clockwise,
The force (action) to pull out the nail 6 with the neck of the nail 6 hooked.
Works. The force for pulling out the nail 6 is transmitted to the corrugated plate 5 via the connecting bolt 3 and the corrugated bottom surface 2a having a large contact area with the nail clip mounting piece 2b of the nail clip support member 2.

Therefore, since the force for pulling out the nail 6 is received by the entire portion of the corrugated plate 5 which is in contact with the corrugated bottom surface portion 2a, the load per unit area of the corrugated plate 5, that is, the stress is small, and the corrugated plate 5 is small. Even if the surface of the corrugated plate 5 is coated with paint,
There is no risk of the paint coming off. Moreover, the force for pulling out the nail 6 is applied from the grip portion 1e with the connecting bolt 3 as the center of rotation, so that the force is smoothly transmitted. By the way, in the conventional nail pulling, since the arc-shaped corner where the short side and the long side are connected serves as a fulcrum, the frictional resistance is large, and the fulcrum position is displaced, so that the pulling out of the nail is not smooth, It required a lot of power.

Further, in the conventional nail pulling, when it is attempted to pull out the nail 6 hit on the corrugated top of the corrugated plate 5, the corner serving as the fulcrum of the nail pulling is located at the corrugated top, so that the corner is corrugated. Although there is a problem that the nail is easily slipped down toward the valley and the nail removing work is difficult, according to the present embodiment, the fulcrum of the nail removing main body 1 is the connecting bolt 3, and the connecting bolt 3 is the corrugated plate 5. Since it is pivotally supported by the insertion hole 2c formed in the nail-pulling attachment piece 2b that is erected on the corrugated bottom surface portion 2a that abuts exactly on the surface, the fulcrum is immobile and the resistance force is small due to rotational friction. , The force for pulling out nails is reduced.

Further, the above-mentioned embodiment has the advantage that the manufacturing cost can be kept low because the nail-pulling support member 2, the connecting bolt 3 and the nut 4 are simply constructed. Also the insertion hole 1c in the base end 1f
It is possible to construct the nail pullout as in the present embodiment by the additional work only by piercing, and it is possible to dramatically improve the practical value. Further, even in the case where the existing nailing main body 1 is used for the nailing operation of the present embodiment, the connection bolt 3 and the connection nut 4 are unscrewed to separate the nailing support member 2. By doing so, there is the convenience that it can be used as a conventional nail puller.

The present invention is not limited to the above-described and illustrated embodiments, and various modified embodiments are possible without departing from the gist of the present invention. For example, in the above-described embodiment, the nail 6 punched in the corrugated crests of the corrugated plate 5 has been described, but the nail 6 punched in the corrugated troughs of the corrugated plate 5 is pulled out. In this case, the relationship between the peaks and valleys of the corrugated bottom surface 2a may be reversed, or the position of the pair of nail-pulling attachment pieces 2b with respect to the corrugated bottom surface 2a may be set. The relationship may be shifted by 1/2 pitch.

In short, in this case, when the nail-pulling portion 1b of the nail-pulling main body 1e sandwiched between the pair of nail-placing attachment pieces 2b is in a state where the corrugated bottom surface portion 2a is in contact with the corrugated plate 5,
It may be configured so as to be able to reach the position of the nail 6 that is hammered in the corrugated valley portion. Further, in order to facilitate the attachment and detachment of the connecting bolt 3 and the nut 4, for example, the connecting nut 4 is previously fixed to one nail pulling attachment piece 2b by welding or the like,
(Alternatively, one of the nail-pulling mounting pieces 2b should be made slightly thicker to form a female screw directly corresponding to the connecting nut.) Instead of the connecting bolt 3, a butterfly-shaped head having a common screw portion is used. A bolt having the same or a bolt having a knob having a large diameter and a knurled outer peripheral surface may be used.

Further, as described above, when the present invention is applied as a nail puller for pulling out the nails 6 hammered in the corrugated troughs of the corrugated plate 5, the shape of the nail pulling portion 1b of the nail pulling main body 1 is It is desirable to approximate the shape of the corrugated valley. With this configuration, it becomes possible to easily enter the nail pulling portion 1b into the neck portion of the nail 6 that is hit in the corrugated valley portion. Further, the present invention is not limited to pulling out nails punched out on a corrugated plate, but can be applied to pulling out nails punched on a flat plate, a curved plate, a plate having irregularities or a pillar, for example. it can.

In this case, the bottom surface of the nail-pulling support member may be changed to a corrugated bottom surface portion to have a flat bottom surface or an arc surface shape (bottom surface). According to this structure, since the corner portion serving as a fulcrum at the time of nail pulling does not directly come into contact with the target object on which the nail is struck, even if the target object is particularly soft, no trace of the corner portion of the nail pulling remains. can do.

[0032]

As is apparent from the above description in detail, according to the present invention, the force for pulling out the nail is received by the entire portion of the corrugated plate that abuts against the corrugated bottom surface of the nailing support member. The load per contact, that is, the stress becomes extremely small, and there is no risk of deforming the corrugated plate,
Therefore, after the nail is pulled out, the corrugated board can be reused without any repair work.

Further, according to the present invention, the present invention can be manufactured at a low cost with a simple structure, and further, the present invention can be achieved by simply performing an additional process of forming an insertion hole in an existing nail pulling body. It can be applied and its convenience can be dramatically improved.

Further, according to the present invention, the pivotal fulcrum of the nail pulling portion during the nail pulling out work is fixed to one point, and since it is rotated about the connecting bolt, the frictional force can be small, and it can be extended. It will also contribute to the shortening of the handle.

[Brief description of drawings]

FIG. 1 shows a configuration of an embodiment of nail pulling according to the present invention.
It is a front view.

FIG. 2 is a right side view of the embodiment.

FIG. 3 is an enlarged sectional view taken along line XX of FIG.

FIG. 4 is a method of driving a corrugated plate using the nail puller according to the present invention.
It is a perspective view which expands and shows the state which is pulling out the attached nail.

FIG. 5 is a main part of one embodiment of nail removal according to the present invention.
It is a front view which shows the structure of a nail removal support member.

FIG. 6 is a plan view showing the structure of the nail pulling support member.
is there.

FIG. 7 is a bottom view showing the structure of the nail pulling support member.
is there.

8 is a sectional view taken along line YY of FIG.

[Explanation of symbols]

 1 Nail Removal Main Body 1a V-shaped Notch 1b, 1d Nail Removal Part 1c Insertion Hole 1e Handle Part 1f Short Side Base End 2 Nail Removal Support Member 2a Corrugated Bottom Part 2b Nail Removal Attachment 2c Insertion Hole 2d Trapezoidal Notch Part 3 Connection bolt 4 Connection nut 5 Corrugated plate 6 Nail

Claims (3)

[Claims] 1. An L-shaped member having one side short and the other side sufficiently longer than the one side, the tip of the one side being a scissor-like nail-pulling portion, and the other side being a handle portion, With respect to the corrugated bottom part in which the bottom is made to have substantially the same shape as the corrugated surface of the corrugated plate as a building element, the nail-pulling main body in which the insertion hole is drilled in the vicinity of the base end part on the one side A nail pulling support member comprising a pair of nail pulling attachment pieces that are erected and provided with insertion holes, and are arranged so that the one end side base end portion of the nail pulling main body faces between the pair of nail pulling attachment pieces. In this state, the pair of nail pulling attachment pieces and a connecting member that is inserted into the through holes formed in the one side base portion and that connects the nail pulling support member to the nail pulling body so as to be rotatable by a predetermined amount. A nail puller characterized by having. 2. The nail pulling main body is configured so that the nail pulling support member can be detached by disconnecting the connecting member so that the nail pulling main body can also be used as an ordinary nail puller. Nail pull. 3. The corrugated bottom surface of the nail pulling support member includes:
The nail puller according to claim 1 or 2, wherein a notch is formed to allow a predetermined amount of rotation of the nail puller portion of the nail puller body.