JPS6125984Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention consists of a long magazine body and a nose protruding from the nail gun body that is constantly moved in the direction of the nail driving hole by the elastic force of a spring member within the magazine body. In the magazine of a nailer equipped with a plate-shaped pusher that is energized, the pusher presses the rearmost nail of the connected nails loaded in the magazine main body in the direction of the nail driving hole. Then, each nail of the connected nails is fed into the nail driving hole in order from the front end side, and when the rearmost nail is fed into the nail driving hole, the nails pressing the body side of the nail This invention relates to a pusher locking device that locks the pusher within the magazine body so that the front edge of the pusher does not enter the nail driving hole.

Generally, in the magazine of this type of nailer, the connecting nails loaded into the magazine body are inserted into the nail driving hole in the nose of the nailer (the diameter of this hole is the diameter of the head of each nail of the connecting nail). The front edge of the plate-shaped pusher that presses in a direction (approximately the same diameter as the diameter) has a body-side engaging portion that engages with the outer periphery of the head of the rearmost nail of the connecting nail. The nail has a body-side engaging portion that protrudes forward from the body and engages with the body of the nail, particularly near the foot side. By pressing the rearmost nail in the direction of the nail driving hole by each of these engaging portions, the entire connected nail advances in the direction of the nail driving hole while following the inner wall of the magazine body.

By the way, when the pusher feeds the rearmost nail of the connecting nail into the nail driving hole, that is, when the front part of the outer periphery of the head of the nail comes into contact with the inner wall of the nail driving hole, The head-side engaging portion of the pusher that engages with the rear portion of the outer periphery of the head of the nail stops at the front end of the magazine body, that is, near the nail supply opening to the nail driving hole; The body-side engaging portion enters the nail driving hole while remaining engaged with the body of the nail.

In this way, with the body-side engaging portion of the pusher entering the nail driving hole, the driver moving forward in the nail driving hole hits the head of the nail, and the head of the nail is struck. When the engagement relationship between the part and the head side engaging part of the pusher is released and the nail is driven toward the exit of the nail driving hole, that is, the tip of the nose, the outer periphery of the head of the nail hits the body-side engaging portion of the pusher and the engaging portion is damaged.

In particular, for large-diameter nails whose head diameter is larger than that of ordinary nails, the vertical distance from the outer circumferential edge of the head to the outer circumferential surface of the body is large, so the body side of the pusher is The amount of penetration of the engaging portion into the nail driving hole is greater than that of a normal nail, and the damage to the engaging portion is large.

Therefore, the present invention was proposed to solve the above-mentioned conventional drawbacks. When the plate-shaped pusher that presses forwards the rearmost nail of the connecting nail into the nail delivery hole, the body-side engaging portion of the pusher that is engaged with the body of the nail is inserted into the nail delivery hole. It is an object of the present invention to provide a locking device for a pusher that locks the pusher within the magazine body to prevent the pusher from entering the magazine body.

Another object of the present invention is to enable the pusher to hold the rearmost nail in the nail delivery hole in a stable state when the pusher feeds the rearmost nail into the nail delivery hole.

The gist of the present invention is to have a long magazine body, and a nose protruding from the nail gun body that is always directed in the direction of the nail driving hole by the elastic force of the spring member inside the magazine body. A pusher in the form of a plate that is biased, and a head-side engaging portion that engages with the head of the rearmost nail of the connecting nail loaded in the magazine main body is provided at the front edge of the pusher. and a body-side engaging portion that protrudes forward from the engaging portion and engages with the body of the nail, and at least one side surface near the body-side engaging portion of the pusher has the above-mentioned body side engaging portion. It has a protrusion that engages with a pusher locking protrusion protruding from the inner wall near the front end of the magazine body, and when the pusher feeds the rearmost nail into the nail driving hole, the nail is stabilized. In addition to securing a held state, the protrusion comes into contact with the pusher locking protrusion, thereby preventing the body-side engaging portion from entering the nail driving hole. That is.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, inside the nose 2, which is a nail driving part protruding from the nail gun main body 1, there are heads 12a, 12b, . . . of nails 11a, 11b, . ... A nail driving hole 3 having approximately the same diameter as the diameter of 12t is opened in the axial direction of the nose 2. Then, one side of the nose 2 (the first
A magazine 4 is disposed on the right side in the figure for loading the connecting nails 10 and feeding the connecting nails 10 into the nail driving holes 3 from the front end side. A front end portion 5a of a long magazine body 5, which is a nail loading member constituting this magazine 4, has a longitudinal direction inclined at a predetermined angle with respect to the axial direction of the nail driving hole 3. It is integrally attached to one side of the nose 2 as shown in FIG.

The reason why the magazine body 5 is inclined toward the rear end and is in the so-called hip-up state is because the connecting nail 10 loaded into the magazine body 5 is constructed as described below. It is.

That is, the connecting nails 10 are a large number of large-head diameter nails (nails whose heads 12a, 12b... have a diameter larger than that of a normal nail) 11a, 11b...1
The body parts 13a, 13b...13t of 1t are closely connected at two places with band-shaped connecting members 20, 21, and each of these nails 11a, 11b...11t is connected to the connecting members 20, 2.
They are configured to be connected in parallel at regular intervals with respect to the longitudinal direction of 1. The belt-shaped connecting members 20, 21 are made of plastic material, and are wrapped around the outer periphery of each of the body parts 13a, 13b...13t.
3t is combined. In addition, each nail 11a, 1
1b...11t, the front side of the head of the next nail to be driven (the nail on the right side in Figure 1 adjacent to each nail 11a, 11b...11t) is the upper part of the rear side of the head of the previous nail. Each nail 11a, 11b...
11t are connected so as to form a staircase shape from the tip end (left end side in FIG. 1) toward the rear end side (right end side in FIG. 1). In other words, when using large head diameter nails, if the nails are simply connected in parallel at regular intervals like ordinary nails, the interval between the nails will be longer, and the nails will not be able to fit into the magazine body of a predetermined length. The number of connected nails also decreases, and the nail gun must be loaded frequently. Therefore, when connecting large head diameter nails, it is essential to connect them in a step-like manner as described above so that the connection spacing is the same as when ordinary nails are connected.

On the other hand, a plate-shaped pusher 30 is disposed within the magazine body 5 and serves to press the connecting nail 10 constructed as described above in the direction of the nail driving hole 3 within the magazine body 5.

A square-shaped notch 31 is formed in the rear part of the pusher 30, and a mainspring spring formed by bending a plate-like body into a square shape is provided in the notch 31, as shown in FIG. A loading member 32 is assembled. A mainspring spring hanging pin 33 is disposed at the center of the mainspring spring loading member 32 so as to stand up. And this spring hanging pin 33
One end 40a is the front end 5 of the magazine body 5.
A mainspring spring 40 fixed to the inner wall 6 on the a side is spirally wound. That is, the pusher 30
is constantly pulled in the direction of the punched hole 3 by the tensile force of the mainspring spring 40.

On the other hand, a head 12t of the rearmost nail 11t of the connecting nail 10 is attached to the front edge 34 of the pusher 30.
A head side engaging portion 35A that engages with is provided. This head side engaging portion 35A is connected to the pusher 30.
The lower end edge 36a of the tongue piece 36 protruding forward (to the left in FIG. 1) on the upper end side of the front end edge 34 of
At the same time, the front edge 34 of the pusher 30 comes into contact with the rear outer peripheral edge 15t of the head 12t of the nail 11t, thereby engaging with the head 12t of the nail 11t. In addition, the above Pushsha 3
The body 13 of the nail 11t is attached to the front edge 34 of the nail 11t.
Body side engaging portion 35 that engages with the nail foot portion 16t side of t.
B is provided. This trunk-side engaging portion 35B includes a tongue piece 37 that protrudes forward (to the left in FIG. 1) at the lower end side of the front edge portion 34 of the pusher 30.
The front edge 37a of the nail 11t comes into contact with the nail foot 16t side of the body 13t of the nail 11t, so that the body 1
It is engaged with 3t.

The nail 11t of each of these engaging portions 35A, 35B
Due to the engagement relationship, the nail 11t is pressed in the direction of the nail driving hole 3, and the entire connecting nail 10 is pushed along the inner wall 7 of the magazine body 5 into the nail driving hole 3.
It can be pressed in the direction. In addition, the nail 11
The front edge 37a of the tongue piece 37 that is in contact with the nail foot 16t side of the body 13t of the nail 11t is connected to the head 1 of the nail 11t
The pusher 30 protrudes forward (to the left in FIG. 1) from the front edge 34 of the pusher 30 that is in contact with the rear outer peripheral edge 15t of the pusher 2t, and the verticality of the nail 11t when pressing the nail 11t. (Each nail 11a, 11b,
...The state in which the axial direction of 11t is parallel to the axial direction of the nail driving hole 3) is maintained.

On the other hand, the body side engaging portion 35B of the pusher 30
As shown in FIG. 3, a pair of protrusions 39, 39 that engage with pusher locking protrusions 38, 38, which will be described later, are provided on both side surfaces 30a, 30b in the vicinity. In this embodiment, two protrusions are provided, but only one protrusion may be provided on one of the two side surfaces 30a, 30b.

These protrusions 39, 39 engage with the protrusions 39, 39 when the pusher 30 sends the rearmost nail 11t into the nail driving hole 3, and the pusher 30 engages with the protrusions 39, 39 at the body-side engaging portion of the pusher 30. Pusher locking protrusions 38, 38 having a semicircular cross section and functioning to prevent the nail drive hole 3 from entering the nail driving hole 3 face each other to the inner wall 6 near the front end 5a of the magazine body 5. It is protruded like this.

Here, the driver 4 reciprocates within the nail driving hole 3 and strikes each nail 11a, 11b...11t of the connected nail 10 that is being fed into the nail driving hole 3.
0, as shown in Figure 4,
The tip end surface 40a, which is the striking surface of the driver 40, has a rectangular shape, so that the head 1 can be removed without removing the core of the nail 11a.
It is formed so that it can hit the rear side upper surface 17a (right side in FIG. 4) of the ball 2a. As shown in FIG. 4, the front side 18b of the head 12b of the second nail 11b to be driven is turned upside down on the rear side (right side in FIG. 5) of the tip surface 40a of the driver 40. A crescent-shaped groove portion 41 is formed. A mountain-like protrusion 42 is formed on the front side (left end in FIG. 5) of the tip end surface 40a of the driver 40 to reinforce the thinned portion due to the formation of the groove 41. There is. The shape of the distal end surface 40a formed in this manner continues to the vicinity of the base end, which is the attachment portion of the striking piston.

Furthermore, concave driver guide grooves 45 and 46 for guiding both ends 43 and 44 of the driver 40 are formed in the inner wall 3a of the nail driving hole 3.

The driver 40 having the above-mentioned structure drives out the nails 11a, 11b, . One side 39a of the protrusions 39, 39 protruding from the pusher 30,
39a (left side surface in FIG. 5) hits the curved surfaces 38a, 38a of the pusher locking protrusions 38, 38 provided protrudingly on the inner wall 6 near the front end 5a of the magazine body 5, the pusher 30 It rotates counterclockwise in FIG. 5 about the pusher locking protrusions 38, 38, and the rear portion of the upper edge 30c of the pusher 30 hits the inner wall 8 on the upper end 5b side of the magazine body 5. At this time, the body part side engaging part 35B of the pusher 30 is connected to the nail foot part 16 of the body part 13t of the nail 11t.
The front end edge 3 of the tongue piece 37, which has the t side fed into the nail driving hole 3 and constitutes the body side engaging part 35B.
7a does not enter into the nail driving hole 3 but is located within the nail supply hole 50.

On the other hand, the head side engaging portion 35A of the pusher 30
The tongue piece 36 constituting the nail 1 enters into the nail driving hole 3 by the rotational movement of the pusher 30 described above.
The front outer circumferential edge 19t of the head 12t of 1t is pressed against the inner wall 3a of the nail driving hole 3. Therefore, the nail 11t is held in a stable state within the nail driving hole 3.

Note that the rearmost nail 11t is fed into the nail driving hole 3 in a state where the nail foot 16t side of the nail 11t is inclined toward the nail supply hole 50 side. 11t head 12
t, and the nail 11t hits the tip 2 of the nose 2.
Since the inclination is corrected vertically during driving toward point a, the nail 11t will not bend and be driven into the material to be driven (not shown), and will be perpendicular to the material to be driven. A nail 11t can be driven.

As described above, according to the present invention, when the pusher feeds the rearmost nail of the connecting nail into the nail driving hole,
It is possible to prevent the body-side engaging portion of the pusher that is engaged with the body of the nail from entering into the nail driving hole. Therefore, when the nail is driven out of the nail driving hole by the driver, the rear outer circumferential edge of the nail will not hit the trunk side engaging portion.

Furthermore, when the pusher feeds the rearmost nail into the nail driving hole, the engagement state between the head side engaging portion of the pusher and the head of the nail is not released, so the nail is pushed into the nail driving hole. It does not fall out of the nail hole and can be held in a stable state within the nail driving hole.

[Brief explanation of the drawing]

Figures 1 to 5 are views showing one embodiment of the present invention, in which Figure 1 is a side sectional view of the vicinity of the attachment point between the nose of the nailer and the magazine body, and Figure 2 is a perspective view of the pusher. , Figure 3 is a sectional view taken along the line A-A in Figure 2, Figure 4 is a cross-sectional view showing the shape of the driver, and Figure 5 is a view when the pusher feeds the connected nail into the nail driving hole. FIG. 3 is a side cross-sectional view of the vicinity of the attachment portion between the nose of the nailer and the magazine main body, showing the state. 1... Nailer body, 2... Nose, 3... Nail driving hole, 4... Magazine, 5... Magazine body,
5a... Front end of the magazine body, 10... Connecting nail, 11t... Nail at the rear end of the connecting nail, 12t...
Head of the rearmost nail, 13t... body of the rearmost nail, 30... pusher, 34... front edge, 3
5A...Head side engaging part, 35B...Body side engaging part, 30a, 30b...Pusher side surface, 38,
38...Protrusion for locking the pusher, 39, 39...Protrusion.

Claims (1)

[Scope of utility model registration request] The machine includes a long magazine body and a plate-shaped pusher that is constantly biased in the direction of the nail driving hole of the nose protruding from the nail gun body by the elastic force of a spring member within the magazine body. The front edge of the pusher has a head-side engaging part that engages with the head of the rearmost nail of the connecting nail loaded in the magazine main body, and projects forward from this engaging part. The pusher has a body-side engaging portion that engages with the body of the nail, and at least one side of the pusher near the body-side engaging portion is provided with a protrusion on an inner wall near the front end of the magazine body. When the pusher feeds the rearmost nail into the nail driving hole, the nail is stably held and the projection engages with the pusher locking projection. A locking pusher in a magazine for a nailer, characterized in that the body side engaging portion is prevented from entering the nail driving hole by coming into contact with a pusher locking protrusion. Stop device.