JPH0318146Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a nail gun for loose nails that drives loose nails supplied from a loose nail alignment and supply device by a striking means driven by an impact. Relating to a holding device.

(Prior art and its problems) A nose member provided with a driving passage that slidably accommodates a striking means that is impulsively driven by air pressure, etc., and a supply path for loose nails that communicates with the driving passage. In a nailer for loose nails equipped with A mechanism is required to keep the nail in the passageway.

This type of nail holding means was developed in the 1970s.
As shown in Japanese Patent No. 28472, a plurality of pawl members are provided at the tip of the ejecting passage, and the nail in the ejecting passage is elastically held between these pawl members, so that when the striking means hits the nail. Sometimes, the striking force forces the nail member open to allow the nail to be driven out. In addition, some screw tightening machines are equipped with a similar mechanism for holding the screw in the nose.

However, when the nail holding device of the above type is adopted in a type of nail gun that drives by a striking means with a strong impact force as described above, the striking means impacts the nail every time the nail is driven. Therefore, the nail members that hold the nails are also directly subjected to the impact force and are easily damaged.

On the other hand, the nail holding device described above can be used in a nailing machine that uses a non-impact driving method, such as using a hydraulic cylinder to drive the nail, but this type of nailing machine A large load is required, and the equipment is also large-scale.

(Purpose of the invention) The present invention solves the above-mentioned drawbacks, and allows loose nails to be used in compact nailing machines that drive with a strong impact force, without being subjected to impact from drivers or nails during driving. The object of the present invention is to provide a nail holding device for a nail gun.

(Means for Achieving the Object) In order to achieve the above object, the nail holding device of the nail gun for loose nails according to the present invention slidably accommodates a striking means that is actuated by impact, and inside the nail holding device. A nailing machine for loose nails, comprising a nose member having a driving passage for driving out loose nails loaded in the nailer, and a supply passage for loose nails communicating with the driving passage of the nose member, A pair of nail holding members are arranged opposite to each other across the center axis of the driving passage, and each nail holding member is supported so as to move toward and away from each other in a direction perpendicular to the nail driving direction, and At times, it is spring-biased so as to protrude forward from the tip of the nose member, and when the nose member is pressed against the material to be driven, it is allowed to move backward along the nose member against the biasing force. A contact member is provided on the nose member, and the contact member has an opposing wall portion extending therefrom facing the side surface of each of the nail holding members, and a nail is driven into one of the side surface and the opposing wall portion of each of the nail holding members. forming an inclined groove obliquely with respect to the direction, forming a pin on the other side to engage with the inclined groove, and moving the nail holding member in the separating direction as the contact member moves backward; It is characterized by

(Operations and Effects of the Invention) Since the present invention is constructed as described above, when using a nailing machine, first load loose nails from the supply path into the driving passage, and the nail holding member The protruding position prevents distal movement of the nail within the passageway, thereby holding the nail in place. When driving the nail into the material to be driven, if the tip of the nose member is pressed against the material to be driven,
Since the contact member moves backward along the nose member against the biasing force, the relative position between the inclined groove and the pin changes due to this backward movement, and the pair of nail holding members move apart. As a result, the nail held by the nail holding member in the driving path is released, so that the nail falls in the driving path, and its tip stops against the surface of the material to be driven. Thereafter, by operating the nail gun, the striking means strikes the nail and drives it into the material to be driven. At this time, since the nail holding member has already moved to the retracted position, it is not subjected to the impact force of the striking means and the nail.

As described above, the present invention has a structure in which the holding member is retracted by the movement of the contact member protruding from the tip of the nose member, and the nail is not held after the tip of the nose member contacts the surface of the material to be driven. Since it is released, it is possible to prevent the nail from falling from the nose member.

In addition, since the nail driving power is not used to retract the holding member, reliable driving is possible without any power loss during nail driving, and there is no risk of collision between the striking member and the holding member, and each of these members damage can be prevented. On the other hand, if the striking member and the holding member are operated by the same power source, there is a risk that these two members will collide.

Furthermore, by separating the nose member from the surface of the material to be driven after driving the nail, the contact member is returned by force, thereby moving the holding member to the protruding position, so that the next time the nail is driven, the nose member is moved away from the surface of the material to be driven. The nail to be inserted can be supplied into the nose member and placed on standby for the next nail driving, allowing rapid nail driving.

Therefore, the present invention can also be applied to a small, impact-driving type nail gun.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the figure, reference numeral A indicates a nailing machine for loose nails which has the same structure as a normal nailing machine whose driving source is air pressure or the like. At the tip of this nailing machine A for loose nails, a striking means 1 which is driven by the driving force of the drive source is slidably housed. Embossing passage 2 for ejecting
A nose member 3 is provided. A loose nail supply path 4 communicating with the driving passage 2 is formed in the middle portion of the nose member 3, and the loose nail supply path 4 is connected to a loose nail supply device (not shown). The loose nail supply device arranges a large number of loose nails in the same direction and supplies them in order from the first one using a feeding means such as air pressure in conjunction with the nail driving operation of the nailing machine A. Nails are loaded into the driving channel 2 from the nail supply channel 4.

Next, a guide groove 5 is formed approximately in the middle of the nose member 3, which is perpendicular to the punching passage 2 and passing through it. Nail holding members 6, 6 are provided facing each other.

The nail holding members 6, 6 have a protruding position (solid line in FIG. 3) that prevents the nail N loaded in the driving passage 2 from moving toward the tip, and a retracted position (solid line in FIG. 3) that allows the nail N to move. (dotted line in the figure).

Further, a contact member 7 is provided at the tip of the nose member 3. This contact member 7 is made of a bifurcated plate-shaped body, one of which 7a serves as a spring holder, and the other has an opposing wall portion 7 facing the side surface of the nail holding members 6, 6.
b, 7b are formed to extend, and the opposing wall portion 7
b, 7b are slidably accommodated in a housing groove 9 formed between the outer surface of the nose member 3 and L-shaped plate members 8 fixed to both sides of the nose member 3, and the spring receiving portion 7a A spring 11 is interposed between the lower recess 10 provided in the nose member 3 and the lower recess 10 provided in the nose member 3. The contact member 7 is normally connected to the nose member 3.
It is biased by the spring 11 to a position where it engages with the threaded part 16 so as to protrude forward from the tip of the nose member 3, and when it is pushed in against the force of the spring 11, it retreats along the nose member 3. It is set up so that it can be moved.

Further, a linkage mechanism is provided between the nail holding members 6, 6 and the contact member 7, which moves the nail holding members 6, 6 from the protruding position to the retracted position due to the backward movement of the contact member 7. ing. This linkage mechanism opens the front face of the guide groove 5 that guides the protrusion and retraction movements of the nail holding members 6, 6, and also allows the pin 12 to protrude toward the opening 5a side of the nail holding members 6, 6. and the housing groove 9 of the contact member 7 so that the contact member 7 can slide across the opening 5a, and the opposing wall parts 7b, 7b are provided with grooves diagonal to the nail driving direction. The pins 12 of the nail holding members 6, 6 are penetrated and engaged with the inclined grooves 13, and the pins 12 are inserted into the plate material 8 forming the accommodation grooves 9.
It is constructed by penetrating a horizontal groove 14 formed long in the horizontal direction.

When using the nailing machine A for loose nails with the above configuration, first, loose nails are driven from the supply path 4 to the driving path 2.
Load it inside. A nail holding member 6 is provided in the driving passage 2,
6 is in a protruding position that prevents the nail N from moving in the direction of the tip, so the tip of the loaded nail N hits the nail holding members 6, 6 and is held in a predetermined position. When the nail N is driven into the material 15 to be driven, when the tip of the nose member 3 of the nailing machine A is pressed against the material 15 to be driven, the contact member 7 is first pressed against the spring 1.
1 and moves backward along the nose member 3, the interlocking mechanism is activated due to this backward movement. That is, as the opposing wall portion 7b moves backward, the intersection between the inclined groove 13 and the horizontal groove 14 shifts outward, so the pin 12 of the nail holding member 6 passing through both the grooves 13 and 14 also moves outward at the same time. Therefore, the nail holding members 6, 6 provided in the driving path 2 move from the protruding position to the retracted position where the nail N is allowed to move. As a result, the nail N held by the nail holding members 6, 6 is released from its holding and falls down within the driving path 2. Since the tip of the nose member 3 is pressed against the surface of the material 15 to be driven, the tip of the nail N also stops against the surface of the material 15 to be driven. after that,
By driving the nailing machine A, the striking means 1 is actuated impulsively, striking the nail N that is allowed to move, and driving it toward the material to be driven. At this time,
Since the nail holding members 6, 6 have already moved to the retracted position, they are not subjected to the impact force of the striking means 1 and the nail N.

In addition, the nail holding members 6, 6 are inserted in the middle of the driving path 2.
The nail N supported by the nail N is connected to the driving path by the tip of the nail shaft being supported in the recess formed by the notch at each tip of the nail holding members 6, 6 in the protruding position. It is positioned approximately in the center of 2,
When the nail holding members 6 and 6 simultaneously move to the retracted position, the nail N falls along the center of the driving path 2 and is positioned on the surface of the material to be driven 15, so that the nail N is tilted. It is possible to prevent driving defects such as buckling of the nail caused by nail driving.

After driving the nail, the nose member 2 is attached to the material 15 to be driven.
When released from the contact member 7, the spring 11 causes the contact member 7 to protrude forward of the nose member 3 again, and at this time, contrary to the above, the pin 12 moves inward, so the nail holding members 6, 6 move toward the tip of the nail N. move to a protruding position that prevents movement. Thereafter, a loose nail feeding device (not shown) is operated, and the nail is fed into the driving passage 2 and held by the nail holding members 6, 6.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a cross section of the nose member of a nailer for loose nails according to the present invention, FIG. 2 is a front view of the nose member of the nailer, and FIG. 3 is a nose member showing a nail holding member. FIG. 4 is a perspective view of the nose member, and FIG. 5 is an exploded explanatory view of the main parts of the linkage mechanism. Code A... Nailer for loose nails, N... Loose nails, 1
...impacting means, 2 ... punching passage, 3 ... nose member, 4 ... loose nail supply path, 5 ... guide groove, 6
... Nail holding member, 7 ... Contact member, 12 ... Pin, 13 ... Inclined groove, 14 ... Horizontal groove.

Claims (1)

[Claims for Utility Model Registration] A nose member that slidably houses a striking means that is actuated by impact and is provided with a driving passage for driving out loose nails loaded inside the nose member, and the nose member. A nailing machine for loose nails is provided with a supply path for loose nails communicating with the driving passage, and a pair of nail holding members are disposed opposite to each other across the center axis of the driving passage, and each nail is The holding member is supported so as to move toward and away from the nail in a direction perpendicular to the nail driving direction, and is normally biased by a spring so as to protrude forward from the tip of the nose member. The nose member is provided with a contact member that is movable backwardly along the nose member against a biasing force when pressed against a material, and the contact member includes an opposing member opposite to a side surface of each of the nail retaining members. A wall portion is formed to extend, and an inclined groove that is inclined obliquely with respect to the nail driving direction is formed on one of the side surface and the opposing wall portion of each of the nail holding members, and the other side is engaged with the inclined groove. A nail holding device for a nail gun for loose nails, characterized in that a pin is formed and the nail holding member is moved in the separating direction as the contact member moves backward.