JP4221829B2 - Nail guide device for nailing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nail guide device for a nailing machine, and more particularly to a nail guide device for preventing the nail from tilting when a nail is ejected.
[0002]
[Prior art]
A nailing machine that uses compressed air or electricity as a power source has a nose part at the tip of the casing with a built-in driver drive mechanism, and the driver descends at high speed in the vertical hole in the nose part to inject the nail in the vertical hole It has become.
[0003]
The inner diameter of the vertical hole in the nose portion is slightly larger than the diameter of the head of the nail so that the driver and the nail can move smoothly. Therefore, since there is a gap between the shaft part having a smaller diameter than the head of the nail and the wall surface of the vertical hole, the tip of the nail can move in the radial direction, and it is not necessarily perpendicular to the center line of the nail and the center line of the nose part. It may not be driven in a posture, but may be driven obliquely or bend and clog in the nose.
[0004]
As a means for solving this problem, a nail guide device using a pair of flap type guide plates pivotally attached to the tip of a nose part is known. The pair of flap-type guide plates (hereinafter referred to as nail guide flaps) are pivotally attached to the tip of the nose and project in the direction of driving the nail, and the tip is closed by a spring. When the driver strikes the nail in the nose portion, the nail pushes open the pair of nail guide flaps, and the nail is driven while maintaining a vertical posture while being sandwiched between the nail guide flaps.
[0005]
[Problems to be solved by the invention]
A nail driver with a nail guide flap that holds the nail in a vertical position at the tip of the nose will drive the nail with the tip surface of the nail guide flap in close contact with the object to be driven. When the nail driver is not sufficiently held and the nail driver moves on the driving object, the nail guide flap closed by the spring may open and the nail posture may tilt. Also, at the moment when the driver hits the nail, the driver slides over the head of the nail and the nail guide flap is opened beyond the head diameter of the nail, and the driver may come off the head of the nail that has been released and may be damaged.
[0006]
Therefore, a technical problem to be solved in order to prevent the nail posture from being disturbed or broken, and the present invention aims to solve the above problem.
[0007]
[Means for Solving the Problems]
The present invention is to propose in order to achieve the above object, pivotally mounted a plurality of nails guide flaps in the contact nose constituted nose portion by a contact nose which is provided on the nose block and the tip of the nailer The tip of the nail guide flap is urged by the spring toward the center of the hole in the nose portion, and the tips of the plurality of nail guide flaps are brought into contact with each other to close each other. In a nail guide device of a nailing machine configured to push open and pass,
A double cylindrical contact nose is fitted to the tip of the nose block , and a contact arm coupled to the contact nose extends to the trigger lever through the back surface of the nose block. forming a plurality of longitudinal grooves extending through the central hole in the outer tubular portion forming a shape, the by pin pivotally nails guide flap vertically in the groove, from the tip the tip of the plurality of nails guide flap of the nose portion It is protruded, formed so as not to contact the target surface driving a plurality of nails guide flaps, and, by interposing a compression coil spring between the upper surface outside the vicinity of the plurality of nails guide flap with the upper edge of the longitudinal groove there is provided a nail guide device of the nail gun, characterized in that have configured so that the tip of the plurality of nail guide flaps pressed against each other is biased in the closing direction.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a pneumatic nailing machine 1, which is provided with a grip 3 extending perpendicularly from the side of a cylinder housing 2, and a nose block 4 is coupled to the tip of the cylinder housing 2 (below in FIG. 1).
[0009]
The nose block 4 is formed with a vertical hole 4a which is a passage between the nail and the driver 5, and a nail such as a nail feed claw 6 and a nail feed piston (not shown) is provided on the back side (right side in FIG. 1) of the vertical hole 4a. A feed mechanism is arranged, and a nail magazine 7 is connected to the rear end of the nose block 4.
[0010]
The cylinder housing 2 includes a pneumatic cylinder 8, and a driver 5 coupled to a piston 9 in the pneumatic cylinder 8 moves up and down in the vertical hole 4 a of the nose block 4. A double cylindrical contact nose 10 is fitted to the tip of the nose block 4, and a contact arm 11 coupled to the contact nose 10 passes through the back surface of the nose block 4 in the direction of the trigger lever 12 in FIG. 1. The upper end of the contact arm 11 faces the tip of a free arm 13 pivotally attached to the trigger lever 12.
[0011]
The contact arm 11 and the contact nose 10 are urged in a direction protruding from the nose block 4 by a spring (not shown). When the tip of the contact nose 10 is pushed against the object to be driven and pushed toward the nose block 4 side, the contact arm 11 and the contact nose 10 are free. When the tip of the arm 13 is pushed up to the trigger valve stem 14 side and the trigger lever 12 is pulled in this state, the free arm 13 is moved to the trigger valve stem 14 side as a whole and the trigger valve stem 14 is pushed, and the pneumatic cylinder 8 starts up. That is, a known safety mechanism in which the pneumatic cylinder 8 is activated by two operations of pressing the tip of the contact nose 10 against the object to be driven and pulling the trigger lever 12, and the pneumatic cylinder is not activated by only one of the operations. Is configured.
[0012]
FIG. 2 shows a nose portion constituted by a nose block 4 and a contact nose 10, and the tip of the nose block 4 has an enlarged hole diameter, and this enlarged diameter portion 4 b is a double tube structure contact nose 10. It is inserted between the inner cylinder part 10a and the outer cylinder part 10b. The center hole diameter of the inner cylinder portion 10a is slightly larger than the head diameter of the nail similarly to the inner diameter of the vertical hole 4a of the nose block 4, and the nail is injected through the center hole of the inner cylinder portion 10a.
[0013]
The contact nose 10 is formed with longitudinal grooves 10c penetrating from the front and rear (left and right in the figure) to the center hole, and nail guide flaps 15 are respectively inserted into the front and rear longitudinal grooves 10c and locked by pins 16. The pair of front and rear nail guide flaps 15 is urged in the direction in which the front ends are closed by a compression coil spring 17 interposed between the vicinity of the outer end of the upper surface of the nail guide flap 15 and the upper edge of the vertical groove 10c. They are in pressure contact with each other.
[0014]
The nail guide flap 15 is attached not to the tip of the contact nose 19 but to the front and rear side surfaces in the vicinity of the tip. When the contact nose 10 is pressed against the nail driving object, the nail guide flap 15 does not directly contact the driving object. It is configured as follows.
[0015]
When the pneumatic cylinder 8 is activated and hits the nail in the nose block 4, as shown in FIG. 3, the nail N pushes and opens the pair of front and rear nail guide flaps 15, and the shaft portion of the nail N moves to the pair of front and rear. The nail guide flap 15 is sandwiched between the nose block 4 and the contact nose 10 while maintaining the vertical posture. As shown in FIG. The nail N is driven completely through the gap. Then, when the driver 5 subsequently rises to the standby position, the nail guide flap 15 is closed by the compression coil spring 17 and returns to the initial state shown in FIG.
[0016]
The present invention is not limited to the above-described embodiment, and various modifications are possible within the technical scope of the present invention, and it is natural that the present invention extends to those modifications.
[0017]
【The invention's effect】
As described above, the nail guide device of the nail driver according to the present invention is configured so that the nail guide flap that holds the nail in a vertical posture does not directly contact the nail driving target surface. Unlike conventional nail guide devices that touch the surface to be driven into the nail, the nail guide flap will not be unintentionally opened by the nailing machine's blurring, etc. It is possible to prevent the nail head from slipping and being damaged.
Further, the contact arm and the contact nose are biased in a direction protruding from the nose block. When the tip of the contact nose is pressed against the object to be driven and pushed toward the nose block, the tip of the free arm is moved to the trigger valve stem. When the trigger lever is pulled in this state, the free arm moves to the trigger valve stem side and the pneumatic cylinder is activated. That is, the pneumatic cylinder is activated by two operations, the operation of pressing the tip of the contact nose against the object to be driven and the pulling operation of the trigger lever, and a safety mechanism is configured in which the pneumatic cylinder is not activated by only one of the operations. Thus, it is possible to stably maintain a balanced state of air pressure toward the ejection of the nail.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a nailing machine according to an embodiment of the present invention.
FIG. 2 is a side sectional view of a nose portion of a nailing machine.
FIG. 3 is a side cross-sectional view of a nose portion showing a state when a nail is driven.
4 is a side cross-sectional view of the nose portion showing a state when the nail is driven following FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Nailing machine 4 Nose block 5 Driver 10 Contact nose 10a Inner cylinder part 10b Outer cylinder part 10c Vertical groove 15 Nail guide flap 16 Pin 17 Compression coil spring

Claims (1)

By a contact nose which is provided on the nose block and the tip of the nail gun pivotally mounted a plurality of nails guide flaps in the contact nose constituted nose portion, the tip of the nail guide flap toward the center of the bore of the nose portion by a spring In a nail guide device for a nail driver configured to bias and close the tips of a plurality of nail guide flaps against each other so that the nail passes through the plurality of nail guide flaps when the nail is ejected ,
A double cylindrical contact nose is fitted to the tip of the nose block , and a contact arm coupled to the contact nose extends to the trigger lever through the back surface of the nose block. forming a plurality of longitudinal grooves extending through the central hole in the outer tubular portion forming a shape, the by pin pivotally nails guide flap vertically in the groove, from the tip the tip of the plurality of nails guide flap of the nose portion It is protruded, formed so as not to contact the target surface driving a plurality of nails guide flaps, and, by interposing a compression coil spring between the upper surface outside the vicinity of the plurality of nails guide flap with the upper edge of the longitudinal groove nail guide device of the nail gun, characterized in that the tips of the plurality of nail guide flaps have configured so as to press each other is biased in the closing direction.

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