JPS643657Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a safety device for a nail driver used in nail driving operations to prevent the danger of nails exploding during operation.

In the conventional nail gun safety device, as shown in Figs. 1 and 2, an arm A for preventing an accidental explosion, which is vertically movable across the trigger T and the driver guide G, is connected to the trigger T and the driver guide G. Since the nail T and the driver guide G are placed apart from each other and are blocked by the nail delivery device O, the nail escapes the delivery device O and is bent along the outer periphery of the nail delivery device O. In this case, the arm A tends to come into contact with other objects, so there are drawbacks such as the arm A being accidentally pushed when unnecessary, causing the nail to explode, and the accuracy of the arm A's operation fluctuating.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a safety device for a nail gun that can secure the function of preventing malfunctions when unnecessary and can reliably prevent the explosion of nails.

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is a housing provided at the front of the nailer main body H, 2 is a handle provided at the rear of the housing 1, and 3 is a nail. Handle 2 to accommodate
A magazine 4 is attached to the lower part of the magazine, and 4 is a delivery device connected to the front end of the magazine 3. The front end of the magazine 4 is a delivery device that is fitted in the housing 1 and operates in conjunction with a piston (not shown) that is driven by pneumatic pressure. A driving path 6 is connected to the lower part of the housing 1 in order to insert and insert the driver 5 which is moved forward and backward in the vertical direction, and to introduce and discharge the nails fed laterally from the feeding device 4.
It is formed to extend vertically through a bottom cap 7 disposed at the upper part of the front end of the delivery device 4 and attached to the bottom surface of the housing 1, and a driver guide 8 arranged at the lower part of the front end of the delivery device 4. , when the driver 5 moves forward, the nail hits the lower end surface 8 of the driver guide 8.
It is launched from a. At the illustrated left end of the bottom cap 7 (in FIG. 3), a hanging piece 9 is provided for forming an air flow path that communicates the housing 1 with a nail feeding cylinder (not shown) installed in the feeding device 4. are arranged vertically, and a through hole 10 is opened in the front-rear direction on one side of the driving path 6 and inside the hanging piece 9.

Reference numeral 11 denotes a valve stem slightly protruding from the lower surface of the front end of the handle 2. When the valve stem 11 is pushed, an air passage (not shown) in the housing 1 is switched and the driver 5 is moved.

Reference numeral 12 denotes a trigger pin 13 attached to the rear surface of the housing 1 so as to be tiltable so as to face the valve stem 11. An idler 14 is tiltable at the upper rear end of the trigger so as to be able to come into contact with and separate from the valve stem 11. The valve stem 11 can be pushed up when the idler 14 is tilted counterclockwise and the trigger 12 is tilted clockwise.

Reference numeral 16 denotes a safety member that straddles the trigger 11 and the driver guide 8 so as to be displaceable in the length direction of the driving path 6, and is removably hooked to the pin 13 and is connected to the idler 14. An upper piece 18 is formed with pushably opposed hooks 17, and a lower end of the upper piece 18 is inserted into the through hole 10 and extends forward, and a screw is attached to the front end of the upper piece 18. The lower piece 19 is vertically connected to the driver guide 8 via the drive guide 8 and has a substantially cylindrical abutment part 19a at its lower end that is slidably fitted onto the driver guide 8. The top piece 18 is usually bent in a detour along the
is biased downward by a spring 20 arranged in parallel at the lower part of the hook 17, so that the contact portion 19a of the lower piece 19 protrudes below the lower end surface 8a of the driver guide 8 by a predetermined length. When the lower end surface 8a of the driver guide 8 is pressed against the surface to be driven in order to drive a nail into the surface to be driven, the contact portion 19a of the lower piece 19 moves back, the safety member 16 moves upward, and the idler 14 moves upward. Since it is pushed up by the hook 17 and tilted counterclockwise, the trigger 12 is tilted clockwise before or after the idler 14 is tilted to push up the valve stem 11, and the driver 5 is driven to drive the nail. It can be driven from the driving path 6.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, the bottom cap 7 is formed with a through hole 10 opened to the side of the driving path 6, and a hanging piece 9 that closes the outer end of the through hole 10, and the safety member 16 is An upper piece 18 whose upper end is connected to the idler 14 so that it can be pushed up; and a lower piece 19 which is attached along the driving path 6 and whose lower end protrudes downward from the driver guide 8 so that it can be retracted. The vicinity of the lower end of the upper piece 18 is inserted into the through hole 10, the side of the vicinity of the lower end of the upper piece 18 is blocked by the vertical piece 9, and the upper piece 18 is separated from the projection range of the outer peripheral surface of the housing 1. The lower end of the upper piece 18 is screwed to the upper end of the lower piece 19.

Therefore, the detour range of the safety member 16 is limited to the vicinity of the driving path 6 and does not protrude from the projected range of the outer periphery of the housing 1, so that the safety member 16
It is possible to prevent the risk of the nail being accidentally pushed when unnecessary and causing the nail to explode, and the problem that the safety member 16 is deformed and its operating accuracy is reduced, and the explosion prevention function of the safety member 16 is inhibited. can.

In particular, the upper piece 18 of the safety member 16, which is easily affected by external force and tends to malfunction due to external force, is inserted into the through hole 10 whose outer end is closed by the hanging piece 9, and the side of the upper piece 18 is inserted. Since this is blocked by the hanging piece 9, external force applied to the safety member 16 is blocked by the hanging piece 9, the safety member 16 is protected from the external force, and erroneous operation of the safety member 16 can be effectively prevented.

That is, the present invention includes a driver guide 8 connected below the bottom cap 7 attached to the lower surface of the housing 1 of the nailer main body H, and a driving path 6 extending vertically through the bottom cap 7 and the driver guide 8. The driver 5 is inserted so that it can move forward and backward relative to the
A trigger 11 is tiltably pinned to the rear side of the housing 1, an idler 14 is tiltably pinned to the trigger 11, and the idler 14 comes into contact with the surface to be driven when driving a nail. This nail driver has a safety member 16 that is installed to be able to move up and down for pushing up, and is configured so that the nail is driven out of the driving path 6 when the trigger 11 and idler 14 are tilted overlappingly. In the machine, bottom cap 7
has a through hole 10 opened on the side of the driving path 6.
and a hanging piece 9 that closes the outer end of the through hole 10, and an upper piece 18 whose upper end is linked so as to be able to push up the safety member 16 with respect to the idler 14;
The upper piece 18 is divided into a lower piece 19 attached along the driving path 6 and whose lower end protrudes retractably from below the driver guide 8, and the upper piece 18 is inserted into the through hole 10 near the lower end. The side near the lower end of the upper piece 18 is blocked by the hanging piece 9, and the upper piece 18 is disposed within the projection range of the outer peripheral surface of the housing 1.
By integrally connecting the safety member 8 and the lower piece 19, the safety member 16 can be installed near the driving path 6, and the installation space for the safety member 16 can be reduced. By blocking the sides of the piece 18 with the hanging pieces 9, the upper piece 18 is protected from external force, and there is an effect that erroneous operation of the upper piece 18 can be prevented. Furthermore, the number of parts for the safety mechanism can be reduced to simplify and compact the mechanism.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the safety device of a conventional nailing machine, Fig. 2 is a front view, and Figs. 3 and 4 show an embodiment of the present invention, and Fig. 3 is a side view. ,
FIG. 4 is a front view. 1... Housing, 5... Driver, 6... Driving path, 12... Trigger, 14... Idler, 1
6... Safety member, H... Nailer body.

Claims (1)

[Scope of utility model registration request] A driver guide 8 is connected below the bottom cap 7 attached to the lower surface of the housing 1 of the nailer main body H, and the nail can move forward and backward into the driving path 6 that runs through the bottom cap 7 and the driver guide 8. The driver 5 is fitted into the housing 1, and the trigger 11 is tiltably pinned to the rear side of the housing 1.
An idler 14 is pinned to the trigger 11 so as to be tiltable, and a safety member 16 is installed so as to be movable up and down in order to push up the idler 14 by coming into contact with the surface to be driven during nail driving. However, in a nailing machine configured such that a nail is driven out of the driving path 6 when the trigger 11 and idler 14 are tilted overlappingly, the bottom cap 7 has an opening on the side of the driving path 6. A through hole 10 and a hanging piece 9 that closes the outer end of the through hole 10 are formed, and the safety member 16 is connected to an upper piece 18 whose upper end can be pushed up against the idler 14 by driving. a lower piece 19 attached along the path 6 and protruding near the lower end so as to be retractable below the driver guide 8;
Insert the vicinity of the lower end of the upper piece 18 into the through hole 10,
The side near the lower end of the upper piece 18 is blocked by the hanging piece 9, the upper piece 18 is arranged within the projection range of the outer peripheral surface of the housing 1, and the upper piece 18 and the lower piece 19 are integrally connected. A safety device for a nailing machine characterized by: