JPH0141576Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a safety lever device for a pneumatic tool.

In conventional pneumatic tools, a lever used for driving and stopping operations is protruded from the tool body at a position where it can be easily operated. Therefore, if the pneumatic tool is handled roughly, there is a risk that this lever may come into contact with another object and be activated at an unnecessary time. For this reason, various safety devices have been proposed that prevent the pneumatic tool from being driven unless operated by an operator.

The present invention relates to such a safety device, which can be easily attached to the lever via a valve rod protruding from the pneumatic tool body, and can be unlocked with a single touch. I will explain based on this.

In the figure, 1 is the main body of the pneumatic tool, 2
3 is a shaft on which the operating lever 4 is swingably attached to one end of the main body, and 3 is a valve rod that drives the pneumatic tool by pressing the operating lever.The tip of the valve rod 3 is attached to one end of the operating lever. It is designed so that it comes into contact with the part.

This operating lever 4 is attached with a locking device, that is, a safety device unless operated to drive the main body 1. This consists of a mounting plate 7 that is fitted onto and supported by the valve rod 3, and a lock lever 5 that is swingably provided at the tip of this mounting plate. As detailed in FIG. 3B, the mounting plate 7 has a flat plate shape with a valve rod through hole 7a drilled at one end for attachment to the main body side, or a slightly curved shape along the outer surface of the main body 1, and this tip Brackets 7c, 7 with vertically bent shaft holes drilled on both side surfaces
c are provided facing each other, and a claw piece 7b, which is a tongue piece plate cut out of a part of the mounting plate body, is provided protrudingly between the brackets and a little inward from the bracket, and the opposing brackets are A lock lever 5 is provided between 7c and 7c. As shown in FIG. 3A, this lock lever 5 has a push piece 5c which is curved at one end so that it can be easily pressed by hand, and a lock hole 5a through which the operating lever 4 is inserted in the center of the push piece 5c. A hole is provided at the other end with shaft portions 5d protruding from both sides.
d and 5d into the bracket shaft hole of the mounting plate to engage the mounting plate and the lock lever, and a spring insertion hole 5b for inserting the spring 6 between the shaft parts.
It is made by perforating. A spring 6 is provided between the lock lever and the mounting plate which are connected to the shaft portion and the bracket.One end of this spring 6 is hooked on a part of the lock lever and the other end is hooked on the claw piece 7b of the mounting plate, so that the lock lever 5 is A force that overlaps the top surface of the mounting plate shall always be applied.

To attach the safety lever device configured as described above to the main body, first insert the tip end of the operating lever 4 into the lock hole 5a of the lock lever on the mounting plate.
Next, stack the mounting plate on the main body 1 and pass the valve rod 3 into the through hole 7a, and then pass the shaft 2 between the bracket shaft hole 4b of the operating lever and the main body, and assemble them together. It is something. And when you use it, when you hold the main body,
With the thumb, the lock lever 5, which is in the solid line position in FIG. 1, is raised and moved to the chain line position beyond the dead point. In this state, the operating lever is unlocked and can be easily operated. In the state shown by the solid line in FIG. 1, even if only the operation lever is pushed, it will not be pushed down because it is locked by the lock lever.

The safety lever device according to the present invention fixes a mounting plate along the outer surface of the body of the pneumatic tool in the longitudinal direction, and inserts a valve rod protruding from the body into a hole drilled at the proximal end of the mounting plate, and attaches it to the mounting plate. The tip of the valve rod is brought into contact with the rear surface of the proximal end of the operating lever pivotally connected to the main body, and a lock lever having a spring attached to the tip end of the mounting plate is supported so as to be tiltable, and a lock hole is drilled in the lock lever. The tip of the operating lever is passed through the locking lever, the locking lever is tilted along the longitudinal direction of the operating lever, and the lever is locked when the locking lever is tilted toward the proximal end of the operating lever. It can be easily attached to the tool body that is already in use without machining the tool body, and since the lock lever is located on the tip side of the operating lever, the lock lever can be operated easily and easily, and the operation is reliable. It has the following advantages.

[Brief explanation of the drawing]

Figure 1 is an overall external view, Figure 2 is an exploded perspective view,
3A and 3B are plan views of the parts. 1...Body, 2...Shaft, 3...Valve rod,
4... Operation lever, 5... Lock lever, 6...
Spring, 7...Mounting plate.

Claims (1)

[Scope of utility model registration request] A mounting plate is fixed along the outer surface of the body of the pneumatic tool in the longitudinal direction, and a valve rod protruding from the body is passed through a hole drilled at the proximal end of the mounting plate, and pivoted to the body along the mounting plate. The tip of the valve rod is brought into contact with the back surface of the base end of the operating lever, a lock lever with a spring attached to the tip of the mounting plate is supported so as to be tiltable, and the tip of the operating lever is fitted into a lock hole drilled in the lock lever. A safety lever device for a pneumatic tool, wherein the lock lever is tilted along the longitudinal direction of the operating lever, and the lever is locked when the lock lever is tilted toward the proximal end of the operating lever.