JP2005066822A - Driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid a redriving when a push lever is pushed up first in a single drive by preventing a push lever and an arm plate provided movably on a trigger arm after driving from interfering with each other. <P>SOLUTION: A trigger is pulled under the condition that the push lever side end of the arm plate provided movably to the trigger arm is pushed up by the push lever to raise the arm plate and push up a plunger with moving the arm plate to the side opposite to the push lever to actuate a trigger valve. The push lever is released from the pushing-up operation to lower the plunger to inactivate the trigger valve. The engagement part on the top face of the arm plate is engaged with the plunger or a member in the neighborhood of the plunger to prevent the arm plate from returning to the push lever side. Thus, the arm plate is prevented from getting into contact with the push lever. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a driving machine that can be switched between single shot and continuous shot by changing the operation order of a trigger and a push lever.

  As an example of a conventional driving machine, there is a driving machine described in Patent Document 1 that can be switched between single shot and continuous shot by changing the operation order of a trigger and a push lever. This is a structure in which if the push lever is operated after performing the trigger pulling operation, it will be fired continuously, and if the trigger pulling operation is performed after operating the push lever, it will be constructed in a single shot. In some cases, the trigger valve was locked in the activated state.

JP-A-7-237148

  The driving machine disclosed in Patent Document 1 described above locks the trigger valve in the activated state when single-shot, so when the single-stroke is performed, the hammering mechanism is put into the driven state after the driving is completed. is there.

  For this reason, simultaneously with the release of the trigger operation, the trigger valve returns to the initial state, the striking mechanism also returns to the initial state, and the compressed air, which is the return stroke of the striking mechanism, is exhausted. After the driving is completed, the main body may be moved to check the driving status.However, if the trigger operation is canceled at this time, the striking mechanism will unexpectedly return to the initial state and the compressed air will be exhausted. It was.

  An object of the present invention is to provide a driving machine in which the trigger valve is returned to the initial state by releasing the push-up operation of the push lever even in the case of single-shot driving, eliminating the above-mentioned drawbacks.

  The above object is achieved by preventing the arm plate from interfering with the push-up operation of the push lever when only the push-up operation of the push lever is canceled after the single shot is finished.

  According to the present invention, when the push lever push-up operation is canceled after the single shot is finished, the arm plate does not interfere with the push lever. A driving machine in which the valve returns to the initial state can be provided.

  An embodiment of the driving machine of the present invention will be described below with reference to FIGS.

  In the figure, 1 is a trigger valve that activates a striking mechanism (not shown) that strikes a stopper, 2 is a plunger that raises the trigger valve 1 to an operating state, and lowers it to make the trigger valve 1 inactive. Is a trigger that can be rotated from the outside and can be operated from the outside, 4 is a push lever that can be moved along the driving direction, and 5 is a pin provided on the operating end side of the trigger 3. A trigger arm 7, which is rotatably attached to the trigger 3 via 6, 7 is slidably provided in the trigger arm 5, and an arm plate 7 a, which is always urged toward the push lever 4 by a spring 8, A convex portion 7b provided on the upper surface of the arm plate 7 is an end portion of the arm plate that regulates the sliding of the arm plate 7 to the push lever 4 side. It is provided on the end side.

  As shown in FIG. 1, in a state where the pulling operation of the trigger 3 and the push-up operation of the push lever 4 are not performed, the plunger 2 is in the lowered position, and the trigger valve 1 is in the driving standby state, that is, the non-operating state. At this time, the arm plate 7 is in a state of sliding toward the push lever 4 until the arm plate end portion 7b hits the pin 6 by the spring 8, and the trigger arm 5 has the arm plate 7 hitting the upper end of the push lever 4. Until now, the trigger operation end side end of the trigger arm 5 is in a state of rotating downward.

  Next, the repeated stroke in which the trigger valve 1 is operated by pushing the push lever 4 after the trigger 3 is pulled will be described with reference to FIGS.

  As shown in FIG. 2, when the pulling operation of the trigger 3 is performed, the trigger arm 5 and the arm plate 7 approach the plunger 2 because the pin 6 moves up, but the plunger 2 is not pushed up and the trigger valve 1 does not operate. After that, when the push lever 4 is pushed up by pressing the driving machine main body against the workpiece as shown in FIG. 3, the push lever side tip of the arm plate 7 is pushed up by the upper end of the push lever 4, Since the tip of the trigger arm 5 on the push lever side pivots upward with the pin 6 as a fulcrum, the plunger 2 is pushed up by the arm plate 7, the trigger valve 1 operates, and driving is performed. When the push-up operation of the push lever 4 is released after the completion of driving, the state returns to the state shown in FIG. 2, and if the push-up operation of the push lever 4 is performed again, the state shown in FIG. Is done.

  When the trigger 3 is pulled, the convex portion 7a provided on the upper surface of the arm plate 7 is positioned between the plunger 2 and the push lever 4 as shown in FIG.

Next, a single shot for operating the trigger valve 1 by pulling the trigger 3 after the push-up operation of the push lever 4 will be described with reference to FIGS.
As shown in FIG. 4, when the push lever 4 is pushed up, the push lever side tip of the arm plate 7 is pushed up and rotated by the upper end of the push lever 4, but the anti-push lever side of the arm plate 7, that is, the pin 6 side. Since the rear end portion does not move, the plunger 2 is in the lowered position and the trigger valve 1 does not operate. Thereafter, when the trigger 3 is pulled, the trigger operation end side end of the trigger arm 5 is lifted as shown in FIG. The plunger 2 is pushed up, and the trigger valve 1 is operated to perform driving. As shown in FIG. 4, when the push lever 4 is pushed up, the trigger 6 is not pulled, so the pin 6 is in the lowered position, so that it is provided on the upper surface of the arm plate 7. The convex portion 7 a is located closer to the operation end side of the trigger 3 than the plunger 2.

  When the trigger 3 is pulled after the push lever 4 is pushed up as shown in FIG. 4, the arm plate 7 pushes up the plunger 2 as shown in FIG. Done. During the pulling operation of the trigger 3, the surface on the push lever 4 side of the convex portion 7a provided on the upper surface of the arm plate 7 abuts the surface on the trigger 3 side of the lower end of the plunger 2, and the arm is moved each time the trigger 3 is further pulled. When the plate 7 slides within the trigger arm 5 against the biasing force of the spring 8 and the trigger 3 is completely pulled, the state shown in FIG. That is, the arm plate 7 is in a state of being retracted to the operation end side of the trigger 3. After the driving is finished, the push lever 4 side surface of the convex portion 7 a is kept in contact with the trigger 3 side surface of the plunger 2 by the urging force of the spring 8, and the arm plate 7 is moved to the operation end side of the trigger 3. Keep sliding.

  After the trigger valve 1 is actuated and driven by the pulling operation of the trigger 3, when the push-up operation of the push lever 4 is released, the push lever 4 is lowered and the trigger arm 5 and the end portion on the push lever side of the arm plate 7 are moved. 6 moves downward as shown in FIG. 6, the plunger 2 is also lowered simultaneously, the trigger valve 1 returns to the initial state, and the striking mechanism (not shown) returns to the initial state. When the plunger 2 is lowered, the trigger arm 5 and the arm plate 7 are rotated downward by the amount that the plunger 2 is lowered. At this time, the convex portion 7a of the arm plate 7 and the lower end portion of the plunger 2 are abutted by the action of the spring 8. The arm plate 7 is kept slid to the operation end side of the trigger 3 while keeping the state.

  Even if the push lever 4 is pushed up again in this state, the push lever 4 upper end and the arm plate 7 do not come into contact with each other as shown in FIG. Even if the push-up operation is performed, the driving is not performed again. Reference numeral 3a denotes an abutting surface provided on the trigger 3 that abuts against the bottom of the trigger arm 5, and when the push-up operation of the push lever 4 is released and the plunger 2 is lowered, the trigger arm 5 is rotated downward and the arm plate 7 is provided in order to prevent the engagement between the convex portion 7a and the lower end of the plunger 2 from being released.

  If the pulling operation of the trigger 3 is released from the state of FIG. 6 in which the push-up operation of the push lever 4 is released by performing a single shot, the trigger operation end side of the trigger arm 5 is lowered and the arm plate 7 is also lowered simultaneously. 7 is disengaged from the lower end of the plunger 2 and the arm plate 7 is slid to the push lever 4 side by the spring 8 to be in the initial state shown in FIG.

  As described above, when the push-up operation of the push lever 4 is canceled after the single shot is finished, the upper end of the push lever 4 and the arm plate 7 are not brought into contact with each other. 1 will return to the initial state. Thus, even in the case of a single shot, the trigger valve 1 returns to the initial state by releasing the push-up operation of the push lever 4, so that the hammering mechanism is simultaneously released after the hammering machine is released from the workpiece. Returns to the initial state, and the compressed air, which is the return stroke, is exhausted.

  In the above embodiment, the convex portion 7a is provided on the arm plate 7, and when the push-up operation of the push lever 4 is canceled after the single shot is finished, the convex portion 7a and the lower end of the plunger 2 are engaged. The machine is not limited to this. When the push-up operation of the push lever 4 is released after the single shot is finished, the arm plate 7 keeps sliding on the operation end side of the trigger 3, and the push-up operation of the push lever 4 is performed again. Even if it is performed, it is sufficient if the push lever 4 cannot push up the arm plate 7. Moreover, it is good also as a structure which provided the member engaged with the convex part 7a of the arm plate 7 in the plunger 2 vicinity.

The principal part expanded sectional view which shows one Embodiment of this invention driving machine. The principal part expanded sectional view which shows the operation state which operated the trigger from FIG. The principal part expanded sectional view which shows the operation state which pushed up the push lever from FIG. The principal part expanded sectional view which shows the operation state which pushed up the push lever from FIG. The principal part expanded sectional view which shows the operation state which carried out the trigger operation from FIG. The principal part expanded sectional view which shows the operation state which lowered | hung the push lever from FIG. The principal part expanded sectional view which shows the operation state which pushed up the push lever from FIG.

Explanation of symbols

1 is a trigger valve, 2 is a plunger, 3 is a trigger, 4 is a push lever, 5 is a trigger arm, 7 is an arm plate, 7a is a convex portion, and 8 is a spring.

Claims (1)

A trigger rotatably mounted on the driving machine body, a trigger arm rotatably mounted via a pin in the vicinity of the operation side of the trigger, a trigger valve that activates a striking mechanism that strikes a stopper, A plunger that moves the trigger valve up and down by moving it up and down, a push lever that is movable along the driving direction of the stopper, and a pusher that is movably mounted in the trigger arm and pushed The arm plate is pushed and rotated by the lever side tip being in contact with the push lever, the urging means for urging the arm plate toward the push lever, and the arm plate is pushed by engaging with the plunger or a member in the vicinity of the plunger. And an engaging portion provided on the upper surface of the arm plate so as to prevent the lever from returning to the lever side. Pulling the trigger while the tip of the push lever side of the rate is pushed up and turned, moves the arm plate to the opposite side of the push lever, lifts the arm plate, pushes the plunger up by the arm plate, operates the trigger valve, and pushes By releasing the lever push-up operation, the plunger is lowered to deactivate the trigger valve, and the arm plate returns to the push lever side by engaging the engaging part on the upper surface of the arm plate with the plunger or a member near the plunger. A driving machine characterized in that the arm plate is prevented from coming into contact with the push lever.

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