JPH06297353A - Idle drive preventive device for driving machine - Google Patents

Abstract

PURPOSE:To enhance operation and workability of a driving machine for check, etc., in an idle drive preventive device by securing trigger operation when the checks are loaded in a magazine. CONSTITUTION:A rotatable lock plate 9 and a vertically movable, lock lever 10 are disposed close to a bit guide 6 on a side portion of a magazine 3 in a driving machine. The lock plate 9 is rotated due to a move of a feeder 12 pressing checks 8 and thus the lock lever 10 is lowered, so that an upper end 10a of the lock lever 10 is engaged to a stop 5a of a trigger 5. Operation of the trigger 5 is thus prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blank driving prevention device for a driving machine, which prevents a blank driving in which the stopper of the driving machine is lost without noticing it.

[0002]

2. Description of the Related Art An example of a conventional blanking prevention device is shown in FIG. A contactor 13 is provided in the vicinity of the hitting portion 7 of the stopper, and one end 13a of the contactor 13 comes into contact with the material 14 to be moved and at the same time the other end 13b controls the operation of the driving machine body 1. 5, a part 12b of the feeder 12 which is a feeding member for pressing the stopper when the remaining quantity of the stopper becomes small or disappears fits into the recess 13c of the contactor 13, The contact 13 is prevented from moving upward to lock the operation of the trigger 5 or prevent the operation of the main body 1.

Further, another conventional device has a stopper member 15 interlocked with the trigger 5 as described in Japanese Patent Application Laid-Open No. 4-210387 shown in FIGS. 8 and 9, and the number of remaining fasteners is reduced. When a portion 12b of the feeder 12 is removed or when it disappears,
5a, the stopper member 15 is prevented from operating, and the operation of the trigger 5 itself is stopped.

[0004]

In the conventional blank punching prevention device shown in FIG. 7, the contactor 13 provided in the fastener pushing-out portion 7 of the driving machine is an obstacle and is hard to see, and it is difficult to aim at it. There was a problem that I could not type. Also in FIG.
In the conventional device shown in FIG. 9, since the stopper member 15 and the trigger 5 have an integral structure, the stopper member 15 must be pulled up together each time the trigger 5 is operated, and the load for pulling the trigger 5 becomes heavy and continuous work is performed. When doing, the operator is tired and there is a problem that the operability is poor. Further, a recess 15a for preventing the stopper member 15 from being pulled up.
When the pulling load is increased due to the deformation between the intervening members, the trigger 5 is erroneously pulled because the distance between the finger 5 and the trigger 5 is long, and when the feeder 12 is on the bit guide 6 side, it is hit. There is a problem in that the driving rod may hit the feeder 12 and damage the feeder 12 because it can be driven. An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a driving machine having good operability which does not hinder the pulling operation of the trigger.

[0005]

[Means for Solving the Problems] The above object is to greatly amplify the minute movement amount of the feeder of the feed member, which detects that the remaining number of the stoppers is small or has disappeared, to a lock lever by greatly amplifying it. This is achieved by providing the position of the locking portion that transmits the transmission and ensures the blocking position and that blocks the rotation of the trigger 5 in the vicinity of the trigger operating position.

[0006]

With the above-described blank hitting prevention device, the pressing portion of the feeder for detecting that the remaining quantity of the fasteners is small or has disappeared depends on the movement amount of one minute fastener. Then, the pin of the lock plate is pressed to rotate the lock plate, and the lock plate amplifies and converts the amount of movement into the movement amount of the lock lever. Then, the other end of the lock lever enters the trigger locking portion, and surely prevents the trigger from rotating.

[0007]

1 to 3 show an embodiment of the blank driving prevention apparatus of the present invention. As shown in FIG. 1, the driving machine is operated by a magazine 3 for accommodating a stopper 8, a main body 1 having a striking rod 2 for hitting and striking the stopper 8, and compressed air or electricity as a power source. A control valve 4 for controlling the operation of the driving rod 2 is provided, and a trigger 5 provided in the vicinity of the control valve 4 of the main body 1 is operated to stop the ejection portion 7 of the bit guide 6 near the magazine 3. Hit tool 8. The idling prevention device of the present invention is disposed on the side surface of the magazine 3 and includes a rotatable lock plate 9, a vertically movable lock lever 10, a spring 11 for urging the lock plate 9, and a stopper 8 as a bit guide. It is composed of a feeder 12 which is pressed to the 6 side and is sequentially fed.

As shown in FIG. 1, a stopper 8 is provided in the magazine 3.
, The feeder 12 is located in the opposite direction to the bit guide 6, and the pressing force of the spring 11 keeps the lock plate 9 clockwise around the pivot center 9c. At that time, the pin of the lock plate 9 is held. 9a is lifted,
The upper end 10a of the lock lever 10 rotatable by the pin 9a
Is located above the locking portion 5a of the trigger 5 and the trigger 5 can be operated. 2 is a cross-sectional view taken along the line AA of FIG. 1, showing a main part of the magazine 3. The lock plate 9 and the lock lever 10 are rotatably connected by a pin 9a, and the pressing part of the feeder 12 is connected. 12a shows a state in which the pin 12b of the lock plate 9 is engaged.

FIG. 3 shows a state in which the stopper 8 has disappeared in the magazine 3, and at the same time when the feeder 12 hits the bit guide 6, the pressing portion 12a of the feeder 12 presses the pin 9b of the lock plate 9 to cause the spring 11 to move. When the lock plate 9 is rotated counterclockwise around the center 9c as a fulcrum, the pin 9a is moved, and the lock lever 10 is pushed down to the upper end 10a of the lock lever 10a.
Engages with the trigger locking portion 5a to prevent the trigger 5 from rotating. Since the idling prevention device configured as described above does not need to be accompanied by the pulling operation of the lock lever 10 when pulling the trigger 5, the load of pulling the trigger 5 can be reduced, so that the operability is improved. . Further, a position for blocking the rotation of the trigger 5 is provided in the vicinity of the operation position and the distance between the fulcrum actions of the lock plate 9 is taken into consideration, so that the minute movement amount of the feeder 12 is amplified, so that a reliable blocking position is obtained. Therefore, it is possible to reliably prevent erroneous operation due to deformation of the members.

However, it has been found that there are the following problems in carrying out the above embodiment. In the above-mentioned idle hit prevention device, the lock lever 10 is locked by the pin 9b of the lock plate 9.
Of the lock lever 1 when the driving tool main body 1 is pressed against the material 14 to be driven to prepare for driving.
The upper end 10a of 0 is engaged with the trigger locking portion 5a,
There is a problem that the trigger 5 cannot be pulled. In order to solve the above-mentioned problem, as shown in FIG. It was provided behind the center 9c. That is, when the stopper 8 is in the magazine 3, the upper end 10a of the lock lever 10 is always positioned above the locking portion 5a of the trigger 5, so that the trigger 5 can be surely operated. be able to.

Further, in the above embodiment, when the final stopper 8 in the magazine 5 is fed into the embossing section 7, the feeder 1
Since 2 is in the vicinity of the bit guide 6, the driving rod 2 may hit the feeder 12 and damage the feeder 12. Therefore, as shown in FIGS. 5 and 6, a slope 5b is provided on the upper portion of the engagement portion 5a of the trigger 5 with the lock lever 10.
Whenever the pulling operation of the trigger 5 is performed, the lock lever upper end 10a moves up the slope 5b, the lock lever 10 moves upward, and the feeder 12 is pushed back.
There is no risk of the driving rod 2 hitting the feeder 12 when driving. The slope 5b is the upper end 10a of the lock lever.
The same effect can be obtained even if it is provided.

[0012]

According to the present invention, the upper end of the lock lever engages with the trigger locking portion to prevent the trigger from being operated when it descends, and the tip end on the bit guide side engages with the lower end of the lock lever. Since a lock plate for rotating the feeder to lower the lock lever when the feeder moves forward by a predetermined amount is provided, operability and workability are excellent, and a trigger is surely activated when there is a stopper in the magazine. It is possible to provide a driving machine having an idle driving prevention device that can be operated.

[Brief description of drawings]

FIG. 1 is an enlarged side view of essential parts showing a first embodiment of a blank driving prevention device for a driving machine according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged side view of essential parts showing a state in which the blank-driving prevention device of the present invention operates.

FIG. 4 is an enlarged side view of essential parts showing another embodiment of the present invention.

FIG. 5 is an enlarged side view of an essential part showing still another embodiment of the blank driving prevention device of the driving tool according to the present invention.

FIG. 6 is a view showing a state in which the blank hitting prevention device is activated.
Side view of.

FIG. 7 is a side view showing an example of a conventional blanking prevention device for a driving tool.

FIG. 8 is a side view showing an example of a conventional blanking prevention device for a driving tool.

FIG. 9 is a side view showing an example of a conventional blanking prevention device for a driving tool.

[Explanation of symbols]

1 is a driving tool, 2 is a driving rod, 3 is a magazine, 5 is a trigger,
6 is a bit guide, 8 is a stopper, 9 is a lock plate, 9
a is a pin, 9b is the other end of the lock plate, 9c is the center of rotation of the lock plate, 9d is heavy hanging, 10 is a lock lever, 1
2 is a feeder.

Claims (2)

[Claims] 1. A driving machine having a feeder for feeding a stopper in a magazine to a bit guide, and a driving rod for vertically moving a stopper to drive the stopper in the bit guide by a trigger operation. A lock lever that engages with the trigger locking portion to prevent the trigger from being operated, and a tip of the bit guide side engages with a lower end of the lock lever, and the feeder is rotated when the feeder advances by a predetermined amount. An idle-driving prevention device for a driving machine, which is provided with a lock plate for lowering. 2. The weight hanging of the mass of the lock lever and the mass of the lock plate on the tip side from the center of rotation of the lock plate is provided rearward from the center of rotation of the lock plate. The blank driving prevention device for a driving machine according to 1.