JP3620343B2 - Nail feeder mechanism of nailer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nail feed mechanism disposed along a feed path provided between a magazine and a nose portion of a nailing machine.
[0002]
[Prior art]
In general, a feed passage is provided between the magazine and the nose portion of the nailing machine, and the connecting nails stored in the magazine are sent out from the feed passage to the nose portion. Further, a cylinder device is disposed outside the feed passage, and a feed claw member is rotatably attached to the tip of the feed piston rod of the cylinder device. Then, the cylinder device is operated to reciprocate the feed claw member together with the feed piston rod along the feed passage, and when retreating, the nail shaft hits the nail shaft of the connecting nail in the feed passage and rotates to retract from the feed passage. The vehicle is moved over the shaft and, when moving forward, enters the feed passage, engages with the nail shaft of the connecting nail and feeds the nail.
[0003]
[Problems to be solved by the invention]
However, an upper claw and a lower claw are formed on the feed claw member vertically. As shown in FIG. 5A, the conventional feed piston rod and the feed claw member have a nail shaft a of the connecting nail set obliquely with respect to the feed piston rod 34, whereas the feed claw member 30 Since the axis P of the rotation support shaft 33 is set in a direction orthogonal to the feed piston rod 34, the distances a1, a2 between the upper claw 31 and the lower claw 32 with respect to the axis P are different from each other. For this reason, when the feed claw member 30 moves backward over the nail shaft a when it moves backward, or when the feed claw member 30 moves forward and engages the nail shaft a, FIG. As shown in FIG. 4, the upper claw 31 is separated from or engaged with the nail axis a faster than the lower claw 32. For this reason, in order for the upper nail 31 to completely move away from or engage with the nail axis a, the lower nail 32 has to rotate much more than that, and therefore, the lower nail 32 needs a useless movement. Become. Further, since there is a difference in the engagement / disengagement time with respect to the same nail axis a, if the nail axis a moves during that time, the upper nail 31 and the lower nail 32 engage with different nail nail axes. There was a problem that nail feeding becomes unstable.
[0004]
An object of the present invention is to solve the above problems and to provide a nail feeding mechanism of a nailing machine that can always feed a nail stably even though a connecting nail connected obliquely is used.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a nail feed mechanism of a nailing machine according to the present invention is arranged along a feed passage for feeding a connecting nail in which nail shafts of a large number of nails are connected obliquely in parallel to a nose portion for launching from a magazine. A feed claw member is rotatably provided at the tip of the feed piston rod coupled to the piston of the cylinder device so that the feed claw member protrudes and retracts from the feed passage. In a nail feed mechanism of a nailing machine spring-biased so as to be engaged, the feed passage is disposed obliquely with respect to the nose portion, and the nail axis of the connecting nail in the feed passage is parallel to the nose portion And the piston of the cylinder device and the feed piston are provided so as to move along the feed passage, the feed claw member is provided obliquely at the tip of the feed piston, and the pivot shaft of the feed claw member is provided. Characterized by providing in parallel with the nail axis of connected nails.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a nailing machine. Reference numeral 1 denotes a body, 2 denotes a grip, 3 denotes a magazine, and 4 denotes a nose portion. A connecting nail is stored in the magazine 3, and the connecting nail is configured to be sent to the nose portion 4 by a feed mechanism. The nail driver drives the driver 5 by a striking mechanism provided inside the body 1 and strikes the nail 6a sent to the nose portion 4 to be driven into the material to be driven.
[0007]
The connecting nail 6 is formed by connecting nail shafts a of a large number of nails 6a obliquely and parallelly through wires or the like, and the connecting nail 6 is sent from the magazine 3 to the nose portion 4 through a feed passage. At this time, the nail shaft a of the connecting nail 6 is fed so as to be parallel to the axis of the nose portion 4. The nail feed is performed by a feed mechanism arranged along the feed passage 7 shown below.
[0008]
As shown in FIG. 2, the feed passage 7 is formed between a wall 7a and a wall 7b (see FIG. 4A) facing each other, and the cylinder device 8 is arranged along one wall 7a. . 7c is a concave groove for guiding the nail head. A feed piston 9 is attached to the cylinder device 8 so as to slide back and forth. The feed piston 9 is configured to slide by compressed air or compressed air and a spring (not shown) supplied alternately to the front and rear ends of the cylinder 8a. A feed claw member 12 is rotatably attached to the tip of the feed piston rod 10 coupled to the feed piston 9 via an intermediate member 11.
[0009]
That is, the feed piston rod 10 is formed in a rod shape and is configured to move obliquely with respect to the nail axis a of the connecting nail 6. As shown in FIG. 3, the upper and lower surfaces of the tip 10a of the feed piston rod 10 are cut flat. On the other hand, a first attachment piece 13 is formed on the rear side of the intermediate member 11 so as to be fitted so as to sandwich the tip of the feed piston rod 10. The first attachment piece 13 and the feed piston rod 10 have shaft holes. 14 are formed, and attachment support shafts 11 (see FIG. 2) are fixed to these shaft holes 14, and the feed piston rod 10 and the intermediate member 11 are integrally coupled. The mounting support shaft is set to be perpendicular to the feed piston rod 10. A second attachment piece 15 is formed on the other side of the intermediate member 11. On the other hand, the feed claw member 12 is formed with a pair of upper and lower receiving pieces 16 which are formed so as to be fitted to the second mounting piece 15. A shaft hole 17 is formed in each of the second mounting piece 15 and the receiving piece 16, and a rotation support shaft 18 (see FIG. 2) fitted in these shaft holes 17 is parallel to the nail axis a of the connecting nail 6. It is set to be.
[0010]
Next, the feed claw member 12 is provided with feed claws 19, 20, and 21 at the upper, middle and lower stages, respectively, and is arranged so as to face the feed claw moving window 23 formed in the wall 7a of the feed passage 7. Has been. A spring (not shown) is attached to the rotation support shaft 18 that connects the feed claw member 12 and the intermediate member 11, and the feed claw member 12 protrudes and retracts with respect to the feed passage 7 around the rotation support shaft 18. In addition to being rotatable, the spring is biased so that it always enters the feed passage 7 and engages with the connecting nail 6.
[0011]
Here, an operation mode of the feeding mechanism having the above-described configuration will be described. When the connecting nail 6 stored in the magazine 3 is set in the nose portion 4 through the feed passage 7 and the leading nail is driven, the cylinder device 8 of the feed mechanism is operated in conjunction with this. When the feed claw member 12 moves backward together with the feed piston 9, the feed claw member 12 urged toward the feed passage 7 side resists the spring as shown in FIGS. 4 (a) and 4 (b). And pivoting around the nail axis a of the connecting nail 6, and at the retracted end, the spring is pivoted in the opposite direction around the pivot shaft 18 by the spring and enters the feed passage 7. The upper, middle and lower feed claws 19, 20, 21 are engaged with the rear nail shaft a. Further, when the feed piston 9 moves forward, the feed piston rod 10 also moves forward in FIG. 5C, so that the feed claw member 12 feeds the nail by the pitch of one nail. Thereby, a new nail is supplied to the nose part 4 and the next driving is performed.
[0012]
By the way, when the feed claw member 12 is rotated around the rotation support shaft 18 as described above, the rotation support shaft 18 is set in parallel with the nail axis a of the connecting nail 6. The distances between the lower feed claws 19, 20, 21 and the nail axis a are equal. Therefore, when the feed claw member 12 moves backward or forward, the upper, middle, and lower feed claws 19, 20, and 21 are simultaneously engaged with and disengaged from the corresponding nail axis a. Moreover, the feed claw member 12 as a whole needs only a small amount of rotation. Therefore, the nail can always be stably fed despite the use of the connecting nail 6 obliquely connected.
[0013]
The feed piston rod 10 and the feed claw member 12 may be directly connected without the intermediate member 11 being interposed. Also in this case, the rotation support shaft is set to be parallel to the nail shaft of the connecting nail.
[Brief description of the drawings]
FIG. 1 is an overall view of a nail driver according to the present invention. FIG. 2 is an enlarged side view of a main part of a nail feed mechanism. FIG. 3 is an exploded perspective view of a nail feed mechanism. c) is an explanatory diagram of the operation mode of the nail feed mechanism. FIG. 5 (a), (b) and (c) are explanatory diagrams at the time of operation mode of the conventional nail feed mechanism.
3 Magazine 4 Nose portion 6 Connecting nail 7 Feed passage 8 Cylinder device 10 Feed piston rod 12 Feed claw member 18 Rotating support shaft

Claims (1)

A feed claw member is fed to the tip of a feed piston rod connected to a piston of a cylinder device arranged along a feed passage through which a coupling nail obtained by connecting a plurality of nail shafts obliquely parallel to each other is fed from a magazine to a nose portion for launching. In a nail feed mechanism of a nailing machine that is provided so as to be rotatable so as to protrude and retract with respect to the passage, and a spring biased so that the feed claw member always enters the feed passage and engages with the connecting nail,
The feed passage is disposed obliquely with respect to the nose portion, the nail shaft of the connecting nail in the feed passage is loaded so as to be parallel to the nose portion, and the piston and the feed piston of the cylinder device are connected to the feed passage. The feed claw member is provided obliquely at the tip of the feed piston, and the pivot shaft of the feed claw member is provided in parallel with the nail axis of the connecting nail. Nail feeder mechanism for nailing machine.

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