JP2004050375A - Mechanism for guiding contact member of nailing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanism for guiding a contact member, which does not spoil the function as a safety gear by a malfunction due to the deformation of the contact member caused by abutment against material to be nailed. <P>SOLUTION: The nailing machine has a driving means for driving nails existing within a nail injection port 15 of a nose part 16 by means of a driver 14, a trigger lever 23 for triggering the driving means, and the contact member 25, which is able to come into contact with a material to be nailed and is slidably arranged at the nose part 16. Projecting guide pieces 30, 31 are formed on the outer peripheral surface of the nose part 16 so as to project toward both sides along the nail injection port 15. A guide piece 33 is formed on the contact member 25 so as to slidably engage with both side end faces 30b, 31b and rear side faces 30a, 31a of the projecting guide pieces 30, 31. The contact member 25 is slidably guided along the nail injection port 15 by means of the projecting guide pieces 30, 31 and the guide piece 33. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, the nails connected to each other are supplied into an injection port formed in a nose portion, and the nail is driven out of the injection port by a driver which is driven in the injection port. The present invention relates to a contact member guide mechanism in a nailing machine provided with a contact member as a safety device which is slidable and protrudes toward a tip end of a nose portion.
[0002]
[Prior art]
In a nailing machine using compressed air as a power source, a cylinder containing a piston driven by compressed air is disposed in a housing forming a body of the nailing machine, and a nail is provided below the cylinder of the housing. A nose portion having an injection port is formed, and a driver for hitting a nail integrally connected to the lower surface of the piston is slidably guided into the nail injection port of the nose portion. A magazine for accommodating a large number of connected nails is connected to the nose portion, and the nails in the magazine are sequentially supplied into the nail injection port by a nail supply mechanism arranged in the nose portion, and compressed air is supplied to the cylinder. Is introduced, the piston is driven, and the nail supplied by the driver into the injection port is driven out of the injection port toward the surface of the material to be driven.
[0003]
In the general nailing machine described above, a trigger mechanism is formed at the base of a grip portion formed integrally with the body, and the nailing machine is activated by operating this trigger mechanism with a finger holding the grip. Like that. Further, the nailing machine is provided with a contact member provided slidably along the nose portion in the nail driving direction and protruding forward of the injection port of the nose portion. A contact mechanism is formed, which is activated by being brought into contact with the surface of the nailing material so that the trigger mechanism can activate the nailing machine.
[0004]
As shown in FIGS. 5 and 6, the conventional contact mechanism includes a contact member 3 protruding in the direction of the distal end of the injection port 2 of the nose portion 1, and a lower end connected to the contact member 3 and an upper end. And a contact arm 4 disposed in the vicinity of the trigger mechanism. The contact member 3 is formed in a substantially cylindrical shape, and a nose portion in which an injection port 2 for injecting a nail is formed at a central portion. The nose portion 1 is slidably mounted on the outer periphery of the cylindrical portion 6 below the nose portion 1 and is slidably guided along the direction of the injection port 2 with respect to the nose portion 1. It is required that the contact member 3 as a safety device slides smoothly with the tip of the nose portion 1 without galling between the two.
[0005]
[Problems to be solved by the invention]
In the contact mechanism of the conventional nailing machine, a nail guide portion 5 is formed below the nose portion 1 to guide the nail into the injection port 2 so that the nail hit by the driver in the injection port 2 does not jump backward. An injection port 2 for driving a nail is formed below the nail guide portion 5, and a cylindrical portion 6 for slidably guiding the contact member 3 is formed. In order to design the height of the nailing machine to be small, the length of the cylindrical portion is formed short. When the contact member 3 is pressed by the material to be driven and slides upward, the contact member 3 and the nail are formed. In order to prevent interference with the guide portion 5, a cutout portion 7 is formed on the rear side of the contact member 3, but is not formed in a complete cylindrical body. Accordingly, the contact member 3 does not have sufficient guide strength against an external force from behind, and the contact member 3 is deformed by receiving an impact from the front, rear, and side directions, and cannot slide with the nose portion 1. Sometimes.
[0006]
Meanwhile, in a work site where a member is nailed using a nailing machine, an operation of positioning a material fixed by nailing at a nailing position is performed. At this time, while the material is placed at the nailing position with the other hand while holding the nailing machine with one hand, the end of the material may be hit with a nailing machine for fine position adjustment of the material. In particular, since the contact member 3 is close to the nailing point, the position of the material is sometimes adjusted by hitting the contact member 3 against the material. In particular, the rear side of the contact member 3 is partially lacked in order to escape the nail guide portion 5 at the lower end of the nose portion 1, so that when an impact from the rear side is applied to the contact member 3, the contact member 3 is deformed. Because it is easy to deform, it may be deformed by contact with the material to be driven and cannot slide with respect to the nose part 1, and the function as a safety device may be lost.
[0007]
The present invention relates to a contact member guide mechanism in which a contact member is deformed by contacting a material to be driven or the like so that the contact member cannot slide with a nose member due to malfunction due to galling or the like, and the function as a safety device is not impaired. An object of the present invention is to provide a nailing machine provided with a nailing machine.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a contact member guide mechanism in a nailing machine according to the present invention drives a driver by the power of compressed air or the like to drive a nail disposed in an injection port formed in a nose portion from the injection port by the driver. A driving means, a manually operable trigger lever for activating the driving means, and a contact member capable of coming into contact with a material to be driven at a tip end of an injection port of the nose along a driving direction with respect to the nose portion. In the nailing machine, which is slidably disposed, a guide protruding piece is formed on an outer peripheral surface of the nose portion along a nail injection port of the nose portion in both side directions, and the guide protrusion is formed on the contact member. A guide piece slidably engaged with both side end faces and the rear face of the piece is formed, and the contact member is slidably guided along the nail ejection port of the nose portion by the guide projection piece and the guide piece. It is characterized in.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings. FIG. 1 shows a nailing machine provided with a contact member guide device according to an embodiment of the present invention. The nailing machine has a striking piston 12 slidably housed in a hollow housing 10 integrally formed with a grip portion 11. A cylinder 13 is arranged, and a driver 14 for hitting a nail is integrally connected to a lower surface of the hitting piston 12. A nose portion 16 forming a nail injection port 15 is attached to a lower portion of the housing 10, and the driver 14 is slidably guided into the nail injection port 15 of the nose section 16. A nail supply guide portion 17 is integrally connected to an opening formed on the side surface of the nail ejection port 15 of the nose portion 16, and a nail supply mechanism 18 arranged along the nail supply guide 17 portion. The connection nails in the magazine 19 connected to the rear part of the nail supply guide portion 17 are sequentially supplied into the nail ejection port 15 of the nose portion 16.
[0010]
A main valve 20 is disposed at an upper end of the striking cylinder 13, and the valve 20 selectively connects the inside of the striking cylinder 13 to an air chamber 21 connected to a compressed air supply source and between an exhaust port. When the main valve 20 connects the inside of the striking cylinder 13 to the air chamber 21, compressed air is introduced into the striking cylinder 13 and the striking piston 12 is driven. A trigger valve 22 for controlling the main valve 20 is disposed at a base of the grip portion 11, and the trigger valve 22 can manually operate a trigger lever 23 formed at a lower portion of the grip portion 11. The contact mechanism 24 protruding forward of the nail ejection port 15 of the nose portion 16 is operated by two operations of pressing against the surface of the material to be driven.
[0011]
The contact mechanism 24 includes a contact member 25 slidably supported on the outer peripheral surface of the nose portion 16 along the nail injection port 15, a contact arm 26 connected to the contact member 25, and the nose portion 16. It is constituted by a hollow nose top 28 forming a nail injection port 27 continuous with the formed nail injection port 15. The nose top 28 is held at the distal end of the contact member 25, and is arranged so as to protrude toward the distal end of the nail injection port 15 of the nose 16 so that the nose top 28 is pressed against the surface of the material to be driven when driving the nail. ing. An upper end of a contact arm 26 connected and connected to a contact member 25 at a lower end thereof is disposed to face an end of a contact lever 29 pivotally supported by the trigger lever 23. The contact lever 29 is rotated by being pressed against the jammed material, so that the trigger valve 22 can be operated by the trigger lever 23.
[0012]
As shown in FIGS. 3 and 4, guide projections 30 and 31 extending in the nail injection direction are formed on both side surfaces of the tip of the nose portion 16, and the outer periphery in front of the nose portion 16 is formed. A guide ridge 32 extending in the injection direction is formed on the surface. On the other hand, on both sides of the contact member 25, guide pieces 33 and 34 having grooves formed therein for accommodating the guide projections 30 and 31 of the nose portion 16 are formed. The contact member 25 is slidably guided along the nail driving direction at the tip of the nose portion 16 by engaging with the guide protrusions 33 and 34 of the portion 16. The front inner side surface of the contact member 25 comes into contact with and is guided by the guide ridge 32 of the nose portion 16.
[0013]
As shown in FIG. 4, guide pieces 33, 34 formed on the contact member 25 have front faces that engage with engagement faces 30 a, 31 a facing the rear side of the guide projecting pieces 30, 31 of the nose portion 16. The engaging surfaces 33a and 34a facing each other are formed, and the nose portion 16 supports an external force applied to the contact member 25 from the rear side when the surfaces come into contact with each other. Further, since the lateral edges 30b, 31b of the guide projections 30, 31 abut against the groove bottoms 33b, 34b of the guide pieces 33, 34, external forces from both side surfaces of the contact member 25 are reduced by the nose portion 16. Supported. Further, the external force applied from the front side of the contact member 25 is supported by the front inner side surface 25 a of the contact member 25 abutting on the guide ridge 32.
[0014]
As described above, the contact member 25 receives the impact force applied to the contact member 25 from both sides and the rear side by the guide protrusions 30 and 31 formed on both sides of the nose portion 16, and further reduces the impact force from the front. The size of the cylindrical portion 16b formed at the lower portion of the nail guide portion 16a formed at the nose portion 16 is reduced or the cylindrical portion 16b is formed at the lower portion of the nail guide portion 16a formed at the nose portion 16. Even in the nose portion 16 having no structure, the contact member 25 is reliably guided.
[0015]
【The invention's effect】
As described above, according to the present invention, a guide piece that projects laterally is formed on the outer peripheral surface of the nose portion, and a guide piece that engages with the guide piece in the front-rear and left-right directions is formed on the contact member. Therefore, the contact member is slidably guided with respect to the nose portion by engaging the two members. Therefore, even when the contact member is hit against the material to be driven or the like, the contact member is kept in contact with the nose portion. The external force from the front and back and both sides is supported, so that the deformation of the contact member can be prevented, and the function of the safety device is impaired due to malfunction such as the contact member being unable to slide with respect to the nose portion due to the deformation. Can be prevented.
[0016]
In addition, since the guide protrusion is formed to protrude to the side of the nose portion, even if the size of the cylindrical portion at the lower end of the nose portion for guiding the contact member is reduced, the guide protrusion and the guide piece are used. It is possible to reliably guide the contact member, and it is possible to prevent the occurrence of operation failure such as the contact member biting into the nose portion and not moving.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a nailing machine in which a guide mechanism for a contact member according to the present invention is implemented. FIG. 2 is a front view showing a nose portion of the nailing machine of FIG. 1; FIG. FIG. 4 is an exploded perspective view of members constituting the safety mechanism. FIG. 4 is a cross-sectional view taken along line AA in FIG. 2. FIG. 5 is a longitudinal sectional side view showing a guide structure of a contact member in a conventional nailing machine. Cross-sectional view taken along line AA in FIG.
16 Nose part 23 Trigger lever 24 Contact mechanism 25 Contact member 26 Contact arm 27 Nail injection port 28 Nose top 29 Contact lever 30 Guide projection 31 Guide projection 32 Guide projection 33 Guide piece 34 Guide piece

Claims (1)

A driving means for driving a driver by the power of compressed air or the like to drive a nail disposed in the injection port formed in the nose portion from the injection port by the driver, and a manually operable trigger lever for activating the driving means; In a nailing machine in which a contact member capable of abutting against a material to be driven is slidably arranged along the driving direction with respect to the nose portion at the tip end of the nose, the outer peripheral surface of the nose portion A guide piece protruding in the direction of both sides along the nail injection port of the nose portion is formed, and a guide piece slidably engaged with both end faces and a rear face of the guide piece is formed on the contact member. A contact member guide mechanism in a nailing machine, characterized in that the contact member is slidably guided along the nail injection port of the nose portion by the guide projection and the guide piece.

Images