JP3520435B2 - Nail feed mechanism of nailing machine for loose nails - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail driving machine for loose nails, in which nails sent from a feeder for loose nails are fed one by one to sliding grooves of a nail driving driver. It relates to a nail feed mechanism. 2. Description of the Related Art Conventionally, as a nail feeding mechanism of a nailing machine for loose nails used in an automatic machine for manufacturing panels for houses, as shown in FIG. A driver guide groove 32 is opened in the portion 31, and a magazine 34 is coupled to the back of the nose portion 31 in a forwardly inclined posture so that the nail N can be introduced (see FIG. 3B). A guide groove 35 is formed in the opening portion of the hole 33 in the left-right direction orthogonal to the driver guide groove 32, and the nail introduction hole 3 is formed on the left side of the guide groove 35.
The slide shutter 36 for opening and closing the slide 3 is loosely fitted, the slider 37 for holding the nail N is loosely fitted together with the slide shutter 36 on the right side, and the nail N supplied from the magazine 34 is introduced by opening and closing the slide shutter 36. Hole 33
To the slider 37 and the slide shutter 3
6, the nail N is once held, the slider 37 is retracted, the nail N is dropped into the driver guide groove 32, and the nail N is stopped in the driver guide groove 32 by the nail stopper 38.
When the nailing machine is pressed against the material to be driven, the contact plate 41 rises, and after the crank lever 40 moves the nail stopper 38 from the driver guide groove 32 in conjunction with the contact plate 41, the driver is knocked down, A nailing machine for driving nails is disclosed in Japanese Patent Application No. 6-9994. The nailing machine is installed so as to be able to move up and down. The nailing machine is driven at a fixed timing when the contact plate is pressed down on the material to be driven down, and after the nailing operation is completed, the nailing machine is moved from the feeder to the nose portion. When the nail is driven in the next stage, the nail is already set in the nose portion so that the preparation for nail driving is completed, thereby increasing the rapid-fire property. However, even when it is not possible to confirm that the contact plate 41 is pressed against the material to be driven (the contact plate 41 does not rise), the nailing machine is driven at a constant timing. . In this case, since the nail stopper 38 is not released, the driver is driven with the nail stopper 38 protruding into the driver guide groove 32.
8 could be damaged by the screwdriver or the nail could be jammed. In order to avoid such inconveniences, it is sufficient to feed the nails after pressing the nailing machine against the material to be driven. There is a problem that can not be. SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, so that even if a driver is knocked down due to a malfunction, the parts of the nailing machine are not destroyed and the rapid shooting property is not impaired. An object of the present invention is to provide a nail feed mechanism for a nail driver. In order to solve the above-mentioned problems, a nail feeding mechanism of a nailing machine for loose nails according to the present invention comprises a nail feeder for feeding loose nails sent from a feeder into the nailing machine. A guide passage for guiding the nail from the feeder is formed in the guide groove for the nail driver of the nailing machine, and the guide passage is formed on the upstream and downstream sides adjacent to the guide passage.
A first stopper which presses and holds the nail in the guide passage and a second stopper which engages with the lower surface of the head of the nail and holds the nail in a suspended state are provided side by side, and the first and the second stoppers are provided. The second stopper is made to protrude and retract into the guide passage, and when the second stopper on the downstream side releases the holding of the leading nail, the shaft of the second nail is pressed and held by the first stopper on the upstream side, A second downstream stopper is provided for the plurality of nails sent from the feeder.
When the first nail is held, the pressing of the second nail is released by the first stopper on the upstream side, whereby the nails in the guide passage are supplied one by one to the guide groove for the driver. I do. FIG. 1 shows a nailing machine for loose nails according to the present invention. The nailing machine has a loose nail (having an enlarged head portion) fed from a feeder 1. Hereinafter simply referred to as nails)
The nail N was fed into the nail feeding mechanism A via the tube 2, the nail N fed into the nail feeding mechanism A was dropped into the driver guide groove 4 formed in the nose part 3, and was driven out by compressed air. The driver 5 drives the material 6 to be driven. The nailing machine is used for an automatic machine for manufacturing a panel for a house or the like as the material 6 to be driven, is installed so as to be able to move up and down, and is configured to be driven when it is lowered onto the material 6 to be driven. Have been. Also,
The feeder 1 is configured to perform a nail feeding operation after the nail driving is completed. As shown in FIG. 2, the nail feed mechanism A is formed in a branch with respect to the guide groove 4 of the driver 5, and guides the nail N from the feeder 1. A first stopper 8 and a second stopper 9 which are arranged on the upstream side and the downstream side which are adjacent to each other and hold the nail in the guide passage 7, respectively, and the first and second stoppers 8, 9 are inserted into the guide passage 7. And a driving means for moving in and out. The guide passage 7 has such a thickness as to allow one nail N to pass therethrough, and has an upper end connected to the feeder 1 via the tube 2 and a lower end opened to the guide groove 4 for the driver. In the lower part of the guide passage 7, through holes 10 and 11 are formed side by side on the upstream side and the downstream side, and the first stopper 8 and the second stopper 9 are arranged in the through holes 10 and 11, Each is connected to a first air cylinder device 13 and a second air cylinder device 14 fixed to the fixing plate 12. The first stopper 8 on the upstream side is a columnar member having a concave groove 15 formed at the tip thereof, and is attached to the rod 16 of the first air cylinder device 13. The depth of the concave groove 15 at the tip is substantially the same as the diameter of the shaft of the nail N as shown in FIG. The second stopper 9 on the downstream side is also a columnar member, and a concave groove 17 is formed at the tip.
The depth of 7 is larger than the shaft of the nail N as shown in FIG.
The width of the groove is formed to be smaller than the head of the nail N. The second stopper 9 is also used for the second air cylinder device 1.
4 attached to the rod 18. As a result, the first stopper 8 and the second stopper 9 are connected to the first air cylinder device 1 as a driving means.
3 and the second air cylinder device 14
As shown in FIGS. 3 (a) and 3 (b), the first stopper 8 inserts the nail N in the guide passage 7 into the
And the second stopper 9 is provided with the concave groove 1.
7 is formed so that the nail N can be held in a suspended state. The surface on the upstream side of the tip of the second stopper 9 is formed so as to be inclined downward and engage with the lower surface of the head of the nail N to guide the nail downstream. In the nail feeding mechanism of the nailing machine for loose nails configured as described above, in the initial state, as shown in FIG. 4 (a), the first stopper 8 retreats from the guide passage 7, and the second stopper 9 is It has entered the guide passage 7. When two or three nails N are fed from the feeder 1 in this state, the head of the nail N1 is engaged with the concave groove 17 of the second stopper 9 and held in a suspended manner. The second nail N2 is supported above the first nail N1. Further, if there is a third nail, it is sequentially held on the nail N2. Next, when the nailing machine descends on the material to be driven,
As shown in (b), the first air cylinder device 13 operates and the first stopper 8 enters the guide passage 7, and the second nail N
2 is caught by the concave groove and pressed and held. Immediately thereafter, the second air cylinder device 14 operates to move the second stopper 9 backward from the guide passage 7 as shown in FIG. Top nail N1
Is released, the leading nail N1 loses support and falls (by its own weight or an air blower) and is sent into the driver guide groove 4 (see FIG. 2). Thereafter, the driver 5 is driven, and the nail N1 in the guide groove 4 is driven out from the nose portion 3 and driven into the material to be driven. When the nailing machine rises after the nailing is completed and separates from the material to be driven, the first stopper 8 retreats again as shown in FIG. 4 (d), and the second stopper 9 enters the guide passage 7 and the initial state. State, the first
The nail N2 held by the stopper 8 is released and jumps into the concave groove 17 of the second stopper 9 and is held. The nail N3 and the like are also sent out from the feeder 1, and the next nail driving is prepared. According to the above-mentioned nail feeding mechanism, the first stopper 8 and the second stopper 9 are made to protrude and retract in the guide passage 7 to hold or release the nail N passing through the guide passage 7. The nails N in the guide passage 7 can be supplied one by one to the sliding passage of the driver 5. Further, since only the nail N is present in the driver guide groove 4 and there is no component constituting the nail feed mechanism, even if the driver 5 is accidentally knocked down, the stopper or the stopper may be used. Guide groove 4 for driver is driver 5
There is no trouble that would be destroyed. Therefore, the nail N can be sent from the feeder 1 to the guide passage 7 immediately after the nail driving is completed, so that the quick-fire property is not performed. Further, even if a plurality of nails are always stored in the guide passage 7, the nails are sequentially dropped into the driver guide groove 4 by holding and releasing the first and second stoppers 8, 9. In rare cases, nailing can be performed continuously,
The working efficiency of nailing can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a nailing machine according to the present invention. FIG. 2 is an enlarged sectional view of a main part of a nail feeding mechanism. FIG. 3A is a first stopper. And FIG. 4 (a), (b), (c), and (d) are explanatory diagrams of the operation mode of the nail feed mechanism. Nail 1 Feeder 4 Guide groove 5 for driver 5 Driver 7 Guide passage 8 First stopper 9 Second stopper

Claims (1)

(57) [Claim 1] A nail feeding mechanism for feeding loose nails sent from a feeder to a nailing machine, wherein a guide groove for a nailing driver of the nailing machine is fed from the feeder. a guide passage for guiding the nail branch formation, this
Guide paths close to the upstream and downstream
A first stopper for holding pushing the nail in the road, nail head
A second stopper which engages with the lower surface of the nail and holds the suspension in a suspended state , the first and second stoppers are made to protrude and retract in the guide passage, and the second stopper on the downstream side is provided for the leading nail. When the holding is released, the shaft portion of the second nail is pressed and held by the first stopper on the upstream side, and the second stopper on the downstream side is
When the first nail of the plurality of nails sent from the feeder is held, the driver presses the second nail one by one by releasing the pressing of the second nail with the first stopper on the upstream side. Feeding mechanism for a nailing machine for loose nails, characterized in that the feed is supplied to a guide groove for the nail.