JP3413950B2 - Nail guide device for driving machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail guide device of a driving machine for guiding a nail when driving a nail into a material to be driven, such as wood. . 2. Description of the Related Art A conventional example will be described with reference to FIG. 6 with reference to Japanese Patent Application No. 6-5286 (Japanese Patent Application Laid-Open No. 6-285773) previously filed by the present applicant. The nail head 14a to insert into the nail guide 10 timber 15 (not shown) the nail tip 14b
, The nail head 14a hits the nail sensing portion 8a of the push lever 8, the push lever 8 moves upward, and the upper end of the push lever 8 releases the lock of the trigger 2. When the trigger 2 is pulled in this state, the compressed air flowing from the control valve 3 to the upper part of the drive valve 5 is discharged to the atmosphere through the air passage 4. Therefore, the drive valve 5 is rapidly opened upward, the piston 6 and the driver blade 7 are rapidly lowered, and the nail 14 inserted in the nail guide 10 is driven into the wood 15. Nail 14 left behind
When the trigger 2 is released in a state where remains in the nail guide 10, the drive valve 5 is lowered, and the piston 6 and the driver blade 7 return to the top dead center. By repeating this operation several times, the nail 14 in the nail guide 10 is driven into the wood 15 evenly. That is, the driving operation is performed by turning on / off the trigger 2. [0004] In the driving machine of the above construction, since the inner diameter of the nail guide 10 is larger than the outer diameter of the nail head 14a, the nail head 14a rattles in the nail guide 10. However, when the nail 14 is pressed against the wood 15 and is driven, it is difficult to aim at the driving portion. Especially the nail head 14a
There is a problem that the nail 14 having a small outer diameter has a large rattling, so that it is not only difficult to aim, but also there is a possibility that the nail 14 is bent and hit. An object of the present invention is to solve the above problems and improve the operability and safety of such a driving machine. [0005] The above object is achieved by forming a contact portion of the bottom of the nail sensing portion of the push lever with the nail head in a mortar shape. In the driving machine constructed as described above, when the nail is inserted into the nail guide and the tip of the nail is pressed against the wood, the nail head follows the mortar shape of the push lever nail sensing part. Then, it is drawn in a predetermined direction. Since the nail head is fixed between the inner wall of the nail guide and the mortar-shaped portion of the push lever nail sensing unit, it is possible to eliminate rattling of the nail head. Further, since the nail head is drawn along the mortar shape, the nail can be fixed in a predetermined direction regardless of the size of the nail head diameter. FIG. 1 shows an embodiment of the present invention. At the lower end of the push lever 8 which locks the trigger 2 by the upper end, a pipe-shaped nail sensing portion 8a for sensing the nail 14 is provided. A permanent magnet 16 for adsorbing and holding the nail 14 is embedded at the lower end of the nail guide 10 which guides the nail 14 by sliding vertically when the nail 14 is driven, and is embedded inside the permanent magnet 16. Is provided with a nail shaft guide 19 formed of a vertical groove extending in the nail driving direction. A flat portion 8c and a mortar-shaped portion 8b located on the nail shaft guide 19 side are formed on the bottom surface of the nail sensing portion 8a. As shown in FIG. 2, the mortar-shaped portion 8b has a higher outer periphery (located at a lower position in FIG. 1) and lowers toward an inner periphery (located at an upper position in FIG. 1).
It is formed as follows. Therefore, as shown in FIG.
Is inserted into the nail guide 10, the head 14 of the nail 14
a moves toward the nail shaft guide 19 along the mortar-shaped portion 8b, and the nail shaft portion 14c enters the nail shaft guide 19. At the same time, the push lever 8 is pushed upward, and the upper end of the push lever 8 releases the lock of the trigger 2. Thereafter, the trigger 2 is pulled to perform the driving operation. A male pulling 20 is intended to depress the normally downward push lever 8. [0010] As shown in FIG.
In the case of No. 4, since only about 1/2 is driven, a further driving operation is required. That is, the nail 14 driven halfway
By inserting the nail guide 10 into the nail head 14a, pushing up the push lever 8 to unlock the trigger 2 and pulling the trigger 2 several times, the nail 14
It is driven flush. As shown in FIG. 5, when the remaining length of the nail 14 becomes smaller than the dimension A, the nail 14 cannot push up the push lever 8, so that the nail guide 10 comes into contact with the wood 15 before it becomes smaller than the dimension A. Then, since the abutting portion 11 of the nail guide 10 pushes up the push lever 8 to release the lock of the trigger 2, the driving operation can be repeated by operating the trigger 2. By configuring a driving machine having an output portion capable of driving a 32 mm nail 14 at one time as described above, a 75 mm nail can be hit several times (5 to 7 times) on wood. It can be driven and the weight of the driving machine is about 1/7
It is small, lightweight and easy to operate.
Sideways work becomes easier. Further nail head 14a is because it is canceller attracting along the conical portion 8b, can be fixed in a predetermined direction irrespective of the diameter of the nail head 14a,
The rattling of the nail head 14a can be eliminated, driving accuracy can be improved, and safety can be improved.
Can be improved . According to the present invention, regardless of the diameter of the nail head, the nail head can be pulled in a fixed direction and the nail can be fixed almost vertically in the nail guide. Ahn together there is no rattling of the nail head, it is stable and the hammering operation
Integrity can be improved .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing one embodiment of the present invention. FIG. 2 is a perspective view showing an embodiment of a nail sensing unit of the push lever. FIG. 3 is a partial side view showing a state where nails are loaded in the driving machine of FIG. 1; FIG. 4 is a side view showing a state immediately after nail driving of the driving machine of the present invention. FIG. 5 is a side view showing an operation state when the remaining nail length is equal to or less than A dimension. FIG. 6 is a side view showing an example of a conventional driving machine. [Description of Signs] 2 is a trigger, 8 is a push lever, 8a is a nail sensing unit, 8
b is a mortar-shaped part, 9 is a blade guide, and 10 is a nail guide.

Claims (1)

(57) [Claim 1] A trigger for opening and closing a control valve, a drive valve opened and closed by the control valve, and opened and closed by the drive valve, and compressed air flows in when the drive valve is opened. A cylinder, a piston reciprocating in the cylinder, a driver blade coupled to the piston for driving a nail or the like, a blade guide for guiding the driver blade, and slidably fitted on the outer periphery of the blade guide. With
The tip is located ahead of the blade guide tip and the blade
A nail guide that slides up and down along the outer circumference of the guide to guide the nail, and the upper end when pressed down by a spring
Locks the trigger and inserts it from the tip of the nail guide.
When the tip of the nail is pressed against the material to be driven,
A push lever which is raised to unlock the trigger by the upper end, when Ru is mounted on the push lever lower end
Both blade guide lower end outer peripheral vertically movably fitted in, and a pipe-like nail sensing unit which is movable up and down within the nail guide, nail sensed by the head of the nail which is inserted from the tip of the nail guide A push lever is pushed up through the part, a driving valve is opened via a control valve by a trigger operation, and a driving operation is started, wherein a contact portion of the nail sensing unit bottom surface with a nail head is provided. The circumference is high,
Formed in a mortar shape that gets lower as you go to the inner circumference,
Place the head of the nail in contact with the mortar at the bottom of the push lever.
A nail guide device for a driving machine, wherein the nail guide device is moved in a predetermined direction in a nail guide along the axis.