JPS6123739Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air supply valve operating lever device for a pneumatic tool.

The air supply valve of a conventional pneumatic tool is as shown in Figure 4.
The operating lever 5 was pivotally mounted with a pin 2 protruding from the handle 1 of an air tool (not shown), and when the operating lever 5 was pressed, the air supply valve 3 was opened and the air motor was driven. Holding down the button 5 for a long time places an extra burden on the worker, promoting fatigue and reducing work efficiency. Further, since conventional pneumatic tools were not equipped with a safety switch, if the operating lever was accidentally pressed while connected to a compressor (not shown), the pneumatic tools would start unexpectedly, which was extremely dangerous.

In view of the above-mentioned drawbacks of conventional pneumatic tools, this idea was devised to prevent workers from getting tired even when used continuously for long periods of time, and to avoid erroneous operations. An embodiment of this invention will be described below with reference to the drawings.

10 is an air tool body with a built-in air motor; 1
1 is a handle portion (hereinafter referred to as a casing) of the main body 10, and 12 is an air supply passage 13 provided in the base of the casing 11, and air supply ports 12 and 13 communicate the air supply port 12 with an air motor (not shown). , an air supply valve 14 is provided in the middle of the passage for opening and closing the passage,
In addition, the compression spring 15 is elasticized, and the casing 1
The head of the air supply valve 14 is made to protrude outside the air supply valve 1, and the air supply valve 14 can be opened and closed by pushing the air supply valve head with the operating lever 20 or relaxing the pressing force. There is no difference from conventional air tools in this respect.

Reference numeral 16 denotes an inverted L-shaped locking portion provided on the side of the main body 10 of the casing 11. The tip of the operating lever 20 can be placed on the top surface of this locking portion 16, or the tip of the lever 20 can be placed on the bottom surface of the locking portion 16. I am now able to do this.

Reference numeral 21 denotes a bent piece formed by bending both sides of the base of the operating lever 20 downward into an L-shape. A long hole 22 is provided in the pair of left and right bent pieces 21, 21 in the longitudinal direction of the lever 20, and the casing The long hole 22 is engaged with the support pin 18 of the operating lever 20, which is inserted into the hole 17 provided in the base of the lever 11 so as to be perpendicular to the axial direction. Therefore, the operating lever 20 can be moved back and forth within the length of the elongated hole 22, and the operating lever 20 when moved forward is the above-mentioned locking portion 1.
6, but this engagement is released when it is moved backward.

In the above embodiment, the long hole 22 is formed in the bent piece 21 provided at the base of the operating lever 20, but the long hole 22 is provided in the casing 11 facing in the same direction, and the pin 2 is formed on the operating lever 20 side. You may also fix a pin corresponding to . Further, 23 is a projection provided at approximately the tip of the lever 20 in order to move the lever 20 forward or backward.

Next, the operation of the above embodiment will be explained.

Move the operating lever 20 forward and press the lever 20.
If the tip of the lever is locked on the upper surface of the locking part 16, even if the operating lever 20 is pushed down any further, the lever will be blocked by the locking part 16, and the air supply valve 14 will not be operated. Never. Therefore, the air tool will not operate and is safe.

Next, when operating the pneumatic tool, hook your finger on the protrusion 23 of the operating lever 20, move the lever 20 backward in the direction of arrow B in FIG. 1, and remove the tip of the lever from the locking part 16. When pushed down to the position shown by the solid line in FIG. 2, the head of the air supply valve 14 is pressed by the bottom surface of the operating lever 20, opening the air supply passage 13 and starting the air motor (not shown). Can be done.

When using the pneumatic tool for a long period of time, the operating lever 20 is moved forward by hooking a finger on the protrusion 23 so that the tip of the lever 20 is engaged with the lower surface of the locking part 16. In this state, the operating lever 20 is locked, so even if you release your finger from the lever, the air supply valve 14
remains pressed, that is, air supply passage 1
3 can be kept open (Figure 3).

If the air motor of the pneumatic tool is to be turned on and off frequently, it is sufficient to keep the operation lever 20 in the state shown in Fig. 2, and simply release the lever 20 to turn on and off the air motor. The air pressure passing through the valve head of the air valve 14 pushes up and blocks the air supply passage 13, and when the lever is pushed down, the air supply passage 13 opens again to operate the pneumatic tool.

Although the embodiments have been explained above, this invention is
In an air tool in which a part of the air supply valve that opens and closes the air supply passage to the air motor protrudes outside the casing, and the operation lever of the air supply valve is pivotally attached to the part, the operation lever 20 is moved back and forth, and , is rotatably mounted, and is provided with a locking part 16 on the outside of the casing that engages with the top or bottom surface of the tip of the lever when the lever moves forward, and releases the lever when it retreats. can be locked as necessary, and if the lever is locked so that it cannot be pushed down, even if the lever is touched by mistake, the intake valve will not open, so it also serves as a safety device. There is an effect.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of this invention, with Figure 1 being a partially cutaway side view of the pneumatic tool, and Figure 2 showing the operation lever being retracted and
FIG. 3 is a side view of the casing section showing the pressed down state; FIG. 3 is a partially cutaway side view showing the operating lever moved forward and locked to the lower surface of the lock; FIG. 4 is the locking mechanism of the operating lever. FIG. 3 is a side view of the casing of the pneumatic tool without the 11 is a casing, 14 is an air supply valve, 16 is a locking portion, 19 is a pin, 20 is an operating lever, and 22 is a long hole.

Claims (1)

[Scope of utility model registration request] In an air tool in which a part of the air supply valve that opens and closes the air supply passage of the air motor projects outside the casing, and the operating lever of the air supply valve is pivotally attached to the part, the operating lever 20 is moved back and forth, and An air supply valve operating lever device for a pneumatic tool, which is rotatably mounted and provided on the outside of the casing with a locking portion 16 that engages with the top or bottom surface of the tip of the lever when the lever moves forward and releases the lever when it retreats. .