JPS64192B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screw nailer. More specifically, the present invention provides a piston hammer that reciprocates within a cylinder, a rotating body that is disposed in front of the piston hammer and applies rotational force to a screw nail coming from a screw nail input port, and a rotary body that applies rotational force to a screw nail that is hit by the screw nail. and a spacer for separating a predetermined distance from an insert.

A manual screwdriver or an electric screwdriver is used to screw screws such as wood screws or iron plate screws into the object to be screwed. In either case, the worker must support the screwdriver with his/her own hands while pushing the screwdriver in with considerable force to perform the screw-in operation. Therefore, screwing in a large number of screws is time-consuming, costly, and labor-intensive.

An object of the present invention is to provide a screw nailing machine that instantaneously and automatically screws a screw into an object to be screwed. Another object of the present invention is to provide a screw nailing machine with a simple structure. Still another object of the present invention is to provide a screw nailing machine that uses a flywheel effect and requires significantly less power source. Still another object of the present invention is to provide a screw nailing machine that instantly and accurately screws a screw into a predetermined position. Still another object of the present invention is to provide a screw nailing machine that can easily unscrew a screwed nail without damaging the shape of the head of the screw.

The present invention will be described in detail below based on embodiments and with reference to the drawings.

As shown in FIGS. 1 and 4, the screw nail machine 1 of the present invention includes a piston hammer 3 that reciprocates within a cylinder 2, a rotating body 4 disposed in front of the piston hammer 3, and a rotating body 4 disposed in front of the piston hammer 3. and a spacer 6 for separating the screw from the object 7 to be driven by a predetermined distance.

The piston hammer 3 is normally connected to a piston 31 at its rear. piston 3
1 forms an airtight mechanism with the cylinder 2 by a packing 32. The piston hammer 3 is pushed forward inside the cylinder 2 by compressed air that instantaneously flows into the cylinder 2 from the rear air inlet 20. The rotating body 4 is, for example, a flywheel turbine having a through hole 41 at its center. The rotating body 4 is rotated by, for example, compressed air that instantaneously flows in from an air inlet 40 located on the side thereof. On the other hand, the screw nail 5 to be screwed is inserted into the screw nailing machine 1 from the screw inlet 50.
The rotating body is inserted into the rotating body through hole 41.
Since the diameter of the rotating body through hole 41 is set to be smaller than the maximum diameter of the screw head 51, the screw 5 is held on the rotating body 4 by the frictional force generated by the contact between the side end surface 52 and the wall of the through hole. Rotating body 4
rotates with As a result, a rotational force is applied to the screw 5. The head 51 of the screw 5 to which a rotational force is applied is struck by the tip of the piston hammer 3, passes through the through hole 41, and is screwed into the object 7 to be screwed in front. As shown in FIG. 2, the rotating body 4 is separated from the object 7 by the spacer 6 so that the thickness is equal to the head thickness of the screw nail 5. The head 51 leaves the rotary body 4 at the moment it is properly driven into the predetermined position without too much or too little. The screw nail 5 is the object to be driven 7
Therefore, at the moment when it is driven in, the rotating body 4 no longer applies any rotational force. The rotation of the screw nail 5 stops at the moment the screw nail 5 is properly screwed into the predetermined position of the object 7 to be driven. As a result, phenomena such as under-tightening or over-tightening do not occur in the screw nail 5. Therefore, there is no fear that the threads or thread grooves of the screw nail 5 or the object 7 to be screwed will be crushed. Moreover, the rotating body 4 does not need to be able to stop its rotation at the same time that the screws 5 are tightened. The rotational force of the rotating body 4 is
It is only necessary that the rotational force be greater than the rotational force required to screw the screw nail 5 into the object 7, and no other special conditions are required. The structure is therefore extremely simple. Compressed air for rotating the rotating body 4 is supplied to the air supply port 200 by finger operation of the first stage of the trigger 8.
The water flows into the rotating body 4 through the inlet 40 .
Compressed air that pushes down the piston hammer 3 flows into the cylinder 2 from the air supply port 200 through the inlet 20 by the second stage operation of the trigger 8 .

The screw nailing machine 1 of the present invention further supports the head side end surface 52 of the screw nail 5 on the inner wall of the rotating body through hole 41 and hits the screw nail head 51 with the piston hammer 3 while applying rotational force. Since the screw head 51 is made of a metal material, the shape of the screw head 51 is hardly damaged. Therefore, even if the screw nail 5 is screwed into the object 7 by this device, if the head shape is hexagonal as shown in FIG. Can be easily unscrewed. Furthermore, if the screwed nail 5 has a plus or minus-shaped engraving on its head, as shown in FIGS. 3b and 3c, it can be easily unscrewed using a screwdriver. Note that the screws 5 are automatically supplied from, for example, a normal magazine 9. This magazine 9 stores a large number of screws and has a built-in screw feeding means.

Since the screw nailing machine of the present invention has such a structure and function, it can achieve excellent effects corresponding to the above-mentioned objective.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial cross-sectional side view of the screw nailer 1 of the present invention, and FIG. 2 shows the rotating body 4 and the screw nail 5 when the screw nail 5 is properly driven into the object 7 to be screwed. Partial cross-sectional side view illustrating the positional relationship, Figures 3a and b
and c are perspective views showing an example of a screw nail used in the present screw nailer 1, respectively, and FIG. 4 is a perspective view showing one embodiment of the screw nailer 1 of the present invention. 1...Screw nailer, 2...Cylinder, 3...
Piston hammer, 4... Rotating body, 5... Screw nail, 6... Spacer, 7... Screw nail driven object.

Claims (1)

[Scope of Claims] 1. A piston hammer that reciprocates within a cylinder; a rotating body that is disposed in front of the piston hammer and applies rotational force to a screw from a screw nail input port;
A screw nailing machine, comprising: a spacer for separating the rotating body by a predetermined distance from the object to be driven. 2. The piston hammer is pushed through the cylinder by compressed air that instantaneously flows into the cylinder from behind, and strikes the head of a screw nail to which rotational force is applied by the rotating body. A screw nailer according to scope 1. 3. The screw nailing machine according to claim 1, wherein the rotating body is a flywheel turbine that has a through hole in the center and is rotated by compressed air that momentarily flows in. 4. The screw from the screw input port fits into the through hole of the flywheel turbine, and is held by the turbine due to the frictional force generated by the contact between the side end surface of the screw nail head and the wall of the through hole, and generates rotational force. A screw nailer according to claim 1 of the appended claims. 5. The screw nailing machine according to claim 1, wherein the distance between the rotating body and the object to be driven with a screw nail is set by the spacer to be equal to the head thickness of the screw nail. 6. The screw nailing machine according to claim 4, wherein the diameter of the flywheel turbine through hole is set to be equal to or less than the maximum diameter of the screw nail head.