JP3621265B2 - Nailer contact arm - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a contact arm of a nailing machine, and more particularly to a tip shape thereof.
[0002]
[Prior art]
In general, a contact arm for preventing a malfunction of the nailing machine is provided at the tip of the driver guide from which the nail is driven in the nailing machine so as to move up and down along the driver guide. According to this contact arm, the trigger pulling operation is effective only in a state where the tip of the contact arm is pressed against the nail driving material and the contact arm is operated to move upward, so that the nail can be driven. In a state where the contact arm is not pushed and operated, even if the trigger is pulled, the operation becomes invalid, so that nailing is not performed.
[0003]
Since the contact arm having such a malfunction prevention function is always pressed against the nail driving material when driving the nail as described above, conventionally, by providing a nail at the tip of the contact arm, for example, the diagonal driving (When driving the nail diagonally with respect to the nail driving material) By making the nail bite into the nail driving material, the spike property of the contact arm with respect to the nail driving material is improved, and thereby the displacement of the nail driving position is shifted. It was preventing.
[0004]
[Problems to be solved by the invention]
However, according to the contact arm provided with the nail for enhancing the spike performance when obliquely driving as described above, when performing the flat driving in which the nail is driven at a right angle with respect to the nail driving material, the nail is the nail driving material. Will not be able to be performed smoothly (successfully moving the nail driver sideways while pressing the contact arm and continuously nailing it). For this reason, when performing continuous hitting, for example, the tip of the contact arm is covered with, for example, a resin cap so that the nail does not bite into the nail driving material.
However, it is troublesome to attach and remove this cap, and there is a risk of losing the removed cap.Furthermore, if the cap is placed on the tip of the contact arm, the nail driving site will be difficult to see from the user. There was a problem that nailing was difficult.
The present invention has been made in view of this problem, and without covering the cap as in the prior art, functions of both smoothness for nailing material during flat driving and spike performance for nailing material during oblique driving. It is an object to provide a contact arm having both.
[0005]
[Means for Solving the Problems]
For this reason, the present invention provides a contact arm having the structure described in the above claims.
According to the contact arm of the first aspect, since the sliding claw protrudes ahead of the spike claw, the sliding claw is pressed against the nail driving material at the time of flat hitting, and the spike claw does not contact. Since the tip corner portion of the sliding claw is formed in an arc shape, it is difficult to be caught by the nail driving material, and therefore continuous hitting can be performed smoothly.
On the other hand, since the spike claw is bent to the outer peripheral side, when the nail driving machine and the contact arm are inclined to strike diagonally, the spike claw is pressed against the nail driving material together with the sliding claw. The spike claw is pressed against the nail driving material and bites into the nail driving material, thereby ensuring the spike property (biting property) with respect to the nail driving material at the tip of the contact arm.
As described above, both the smoothness during flat strike and the spike performance during oblique strike can be ensured without attaching a cap as in the prior art, so that it takes time and effort to attach and remove the cap as in the prior art. There is no need, and there is no possibility of losing the removed cap, and furthermore, the visibility of the nail driving position is not impaired by the cap during flat hitting or continuous hitting.
In addition to the structure of claim 1, the sliding claw is provided with an inclined surface inclined in the direction in which the thickness of the sliding claw is reduced toward the tip side on the inner peripheral side of the flat claw sliding claw. In contrast, since the shape is easier to bite, the sliding claw can also be given a spike function for the nail driving material when slanted. According to this, the inclination direction of the nailing machine capable of exhibiting the spike function is increased as compared with the case where the spike nails are spiked only, and the usability of the nailing machine is further improved.
[0007]
According to the contact arm of the second aspect , when the nail driving machine is inclined in a plurality of directions and slant driving is performed, it is possible to ensure the spike property for the nail driving material.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a nailing machine 1 having a contact arm 4 according to this embodiment. This embodiment is characterized by the tip shape of the contact arm 4 in particular, and the other basic configuration of the nailing machine 1 is not particularly changed, but will be briefly described below. In FIG. 1, reference numeral 2 denotes a main body of the nailing machine 1. The nailing machine main body 2 is internally provided with a piston (not shown) that reciprocates by supply and exhaust of compressed air. Further, a driver guide 3 having a substantially cylindrical body is attached to the front surface (right end surface in the drawing) of the nailing machine main body 2, and the driver attached to the piston reciprocates in the guide hole of the driver guide 3. A contact arm 4 according to this embodiment is supported around the driver guide 3 so as to be movable along the driver guide 3.
[0009]
Further, a handle portion 6 is provided on a side portion of the nailing machine body 2, and a nail magazine 7 is attached between the handle portion 6 and the driver guide 3. A large number of nails (not shown) loaded in the nail magazine 7 are supplied one by one into the guide holes of the driver guide 3 in conjunction with the nail driving operation, and the supplied nails are struck and driven out by the driver. .
[0010]
As shown in FIG. 1, the bracket 8 for fixing the nail magazine 7 to the distal end portion (lower part in the drawing) of the handle portion 6 is provided with a storage portion 8a for storing a cap 9 that is not used. It has been. The cap 9 is made of resin and is mounted so as to cover the tip of the contact arm 4 when it is desired to prevent the material from being damaged more reliably. On the outer surface of the contact arm 4, hooking recesses 4a to 4a for holding the cap 9 are formed (see FIG. 2).
By attaching the cap 9 to the tip of the contact arm 4, the nail driving material can be prevented from being damaged by the pressing of the tip, and the smoothness of the tip against the nail driving material can be ensured. Can do.
[0011]
Now, the contact arm 4 of the present embodiment has a substantially cylindrical shape, and is arranged in a state surrounding the vicinity of the tip of the driver guide 3. An arm portion 4 a is formed at the rear end (left end in FIG. 1) of the contact arm 4, and the rear end of the arm portion 4 a reaches the vicinity of the trigger 5. The pulling operation of the trigger 5 is effective only in a state in which the contact arm 4 is pressed against a nail driving material (not shown) and an upward movement operation (operation to move leftward in FIG. 1) is performed. By the effective pulling operation of the trigger 5, the piston moves down and the driver moves down (moves to the right in the figure) in the guide hole of the driver guide 3, whereby one nail supplied into the guide hole Is struck and driven into the nailing material.
[0012]
Details of the tip shape of the contact arm 4 are shown in FIGS. At the tip of this contact arm 4, four flat hitting claws 10 to 13 and three diagonal hitting claws 14 to 16 are provided. The flat claws 10-13 and spike claws 14-16 are alternately arranged along the circumferential direction of the contact arm 4 as shown. That is, in FIG. 3, the first sliding claw 10, the first spike claw 14, the second sliding claw 11, the second spike claw 15, the third sliding claw 12, the third spike claw 16, the fourth sliding claw in the counterclockwise direction. They are arranged in the order of 13.
[0013]
As shown in FIG. 2, the first to fourth sliding claws 10 to 13 are formed longer than the first to third spike claws 14 to 16 and are further forward (downward in FIG. 2, that is, the nail driving material side). As shown in the drawing, the tip end surface is formed on a flat surface perpendicular to the axis of the contact arm 4.
On the inner peripheral surface side of each of the sliding claws 10 to 13, inclined surfaces 10 a to 13 a are formed so as to be inclined in the direction of decreasing the plate thickness toward the tip side. Further, the corners 11b and 12b of the second sliding claw 11 and the third sliding claw 12 on the second spike claw 15 side are formed in an arc shape. Further, the corner 10b of the first sliding claw 10 on the side opposite to the first spike claw 14 and the corner 10b of the fourth sliding claw 13 on the side opposite to the third spike claw 16 are also formed in an arc shape.
[0014]
Further, the corner portion 10c of the first sliding claw 10 on the first spike claw 15 side and the corner portion 11c of the second sliding claw 11 on the first spike claw 15 side are formed on an inclined surface, so that both the sliding claw 10 , 11 is widened, and as a result, the spike performance of the first spike claw 14 when the diagonal strike is performed as described later is improved (the spike claw 11 is not required to be bent so much toward the outer periphery). The first spike claw 14 bites the nail driving material).
For the same purpose, the corner portion 12c of the third sliding claw 12 and the corner portion 13c of the fourth sliding claw 13 are similarly formed on the inclined surface, and the interval between the sliding claws 12 and 13 is widened.
[0015]
Next, the 1st-3rd spike nail | claws 14-16 are each formed in the front-end | tip acute angle, and are formed in the shape which is easy to bite with respect to a nail driving material.
The first to third spike claws 14 to 16 are each bent at an appropriate angle on the outer peripheral side. The first to fourth sliding claws 10 to 13 are not bent like the spike claws 14 to 16 but are formed straight along the axial direction of the contact arm 4.
[0016]
According to the contact arm 4 of the first embodiment configured as described above, the nailing machine 1 is positioned straight (perpendicular) to flatten the contact arm 4 as shown in FIG. Since the first to fourth sliding claws 10 to 13 protrude forward from the first to third spike claws 14 to 16 when pressed at right angles to the first to fourth sliding claws, The claws 10 to 13 are pressed against the nail driving material, and the first to third spike claws 14 to 16 do not contact the nail driving material.
Since the tip surfaces of the first to fourth sliding claws 10 to 13 are formed on a flat surface orthogonal to the axis of the contact arm 4, the first to fourth sliding claws 10 are formed in the case of flat hitting. The tip surface of ˜13 is pressed against the nail driving material W in a state of being in contact with the entire surface. Since the flat surface is pressed against the nail driving material W, the contact arm 4 is pressed against the nail driving material W in a state where it is slippery in the lateral direction (surface direction of the nail driving material W). The smoothness with respect to the nail driving material W of the arm 4 is ensured.
[0017]
On the other hand, as shown in FIG. 5, the nail driver 1 is tilted forward (to the right in FIG. 5) with respect to the nail driving material W so that the nail driving device 1 is tilted diagonally. The second spike claw 15 is pressed against the nail driving material W in addition to the second and third sliding claws 11 and 12 (the second sliding claw 11 is not visible in FIG. 5). When the second spike claw 15 is pressed against the nail driving material W and bites in, the position of the tip of the contact arm 4, that is, the nail driving position, is maintained, and thereby the nail driving position is positioned by an impact associated with the nail driving operation. Accurate nailing can be performed without shifting.
[0018]
Similar spike performance is exhibited not only when the nailing machine 1 is tilted forward and slanted as described above, but also when slanted while tilting left or right. That is, as shown in FIG. 6, when the nail driving machine 1 is tilted leftward (rightward in FIG. 6) and slanted driving is performed, the first and second sliding claws 10 and 11 (in FIG. In addition, the first spike claw 14 is pressed against the nail driving material W, and the nail driving position is maintained.
Further, as shown in FIG. 7, when the nailing machine 1 is tilted rightward (leftward in FIG. 7) and slanting is performed, the third and fourth sliding claws 12 and 13 (fourth in FIG. 7). In addition, the third spike claw 16 is pressed against the nail driving material W, and the nail driving position is maintained.
[0019]
As described above, according to the contact arm 4 of the present embodiment, the sliding arm is provided with the four sliding claws 10 to 13 and the three spike claws 14 to 16 at the tip thereof. The front end surfaces of the sliding claws 10 to 13 are pressed against the nail driving material W, thereby ensuring the smoothness of the contact arm 4 with respect to the nail driving material W. In addition, when the nail driving machine 1 is tilted with respect to the nail driving material W in order to strike diagonally, the nail driving material W is spiked in addition to the sliding claws 10 and 11 (or 11, 12 or 12, 13). The nail | claw 14 (or 15 or 16) is pressed, by this, the spike property with respect to the nail driving material W is ensured, and, thereby, the position shift of a nail driving position can be prevented.
Therefore, both the flat hitting and the diagonal hitting can be performed without attaching the cap 9 to the tip of the contact arm 4 as in the prior art. Therefore, it is not necessary to attach and remove the cap, and the removal is possible. There is no risk of losing the cap, and there is no problem that it is difficult to see the nail driving site as in the case where the cap 9 is mounted. Can do.
[0020]
Further, in the case of the present embodiment, inclined surfaces 10a to 13a are formed on the inner peripheral side of the sliding claws 10 to 13 such that the plate thickness becomes thinner toward the tip. According to this configuration, when the nailing machine 1 is tilted to perform oblique driving, each sliding claw 10 (or 11, 12, 13) can also be caused to bite into the nail driving material W and function as a spike claw. This makes it possible to tilt the nail driver 1 in more directions and perform accurate nail driving.
[0021]
Further, since the driving mode can be switched from diagonal driving to flat driving without mounting a cap as in the prior art, it is possible to realize quick nail driving by omitting the labor of mounting the conventional cap.
Further, conventionally, in the case of a contact arm having only diagonal claws, it is necessary to attach a cap when it is necessary to prevent the nailing material from being damaged. Accordingly, it is possible to prevent the nail driving material w from being damaged during flat driving without mounting the cap 9. Note that the cap 9 can be attached to the tip of the contact arm 4 when it is necessary to more reliably prevent the nailing material from being damaged.
[0022]
Various modifications can be made to the embodiment described above. For example, the sliding claws 10 to 13 are provided at four places and the spike claws 14 to 16 are provided at three places. However, the number of the sliding claws and the spike claws is arbitrary, and the usage mode of the nailing machine can be changed. It can be set as appropriate in consideration.
Further, it is not always necessary to dispose the spike claw between the two sliding claws, and a range in which the sliding claw continues or a range in which the spike claw continues may be set.
Further, if the functions of the sliding claws 10 to 13 are limited to smoothness, the inclined surfaces 10a to 13a on the inner peripheral side thereof may be omitted.
[Brief description of the drawings]
FIG. 1 is an overall view of a nailing machine including a contact arm according to an embodiment. This figure has shown the right side (right side seeing from the user side) of a nailing machine.
FIG. 2 is a front view of a distal end portion of a contact arm. In this figure, the contact arm is shown pressed against the nail driving material at a right angle. The front surface of the contact arm refers to the front when viewed from the direction of arrow (2) in FIG.
FIG. 3 is a view taken in the direction of arrow (3) in FIG. 2 and showing a tip surface of a contact arm.
FIG. 4 is a view of a contact arm developed from the outer surface side.
FIG. 5 is a right side view of the distal end portion of the contact arm when the nailing machine is tilted forward (upward in FIG. 1) for oblique driving.
FIG. 6 is a front view of the distal end portion of the contact arm when the nailing machine is tilted to the left to perform oblique driving.
FIG. 7 is a front view of the distal end portion of the contact arm when the nailing machine is tilted to the right to perform oblique driving.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Nail driver 2 ... Nail driver body 3 ... Driver guide 4 ... Contact arm 4a ... Arm part, 4b ... Hole 5 ... Trigger 6 ... Handle part 7 ... Nail magazine 8 ... Bracket, 8a ... Cap storage part 9 ... Cap DESCRIPTION OF SYMBOLS 10 ... 1st sliding claw 11 ... 2nd sliding claw 12 ... 3rd sliding claw 13 ... 4th sliding claw 10a-13a ... Inclined surface (inner surface side), 10b-13b ... Arc-shaped corner | angular part, 10c-13c ... Inclination Surface 14 ... 1st spike claw 15 ... 2nd spike claw 16 ... 3rd spike claw w ... Nail driving material N ... Nail

Claims (2)

A contact arm which is arranged in a state of surrounding the tip of a driver guide for driving a nail and is pressed against a nail driving material when driving a nail, and has a circular corner at the tip. The sliding claw and the slanting claw are integrally formed, the flat claw sliding claw protrudes ahead of the spike claw, and the slanting claw spike claw is provided at a plurality of locations in the circumferential direction. each is provided bent outer circumferential side, nailers contact arm and configuration ready slope hitting forward in addition to the inclined strike in the lateral direction of the nailer. 2. The contact arm according to claim 1, wherein a plurality of sliding nails for flat driving and spike nails for oblique driving are provided alternately in the circumferential direction, and the nail driving machine is inclined to insert any one of the spike nails. A nailing machine contact arm configured such that when it is pressed against, the sliding claws on both sides of the spike claws are pressed against the nailing material .

Images