JP2001162555A - Driving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving machine serviceable even in the condition not connected to an air compressor, allowing easy performance of the compressed air filling operation, simply performing the operation to release the compressed air out of the body to the atmosphere after the end of the driving operation, and allowing a single unit of this driving machine to make both the cleaning works with air duster and the driving operation. SOLUTION: The driving machine is equipped with a second pressure accumulating chamber 20 capable of accumulating the compressed air having a pressure higher than the air pressure which the body can accept, an air intake 16 connectable to an air compressor via an air hose, etc., a communicating control valve 22 to control the communication between the second pressure accumulating chamber 20 and the air intake 16, a pressure reducing valve 21 to decompress the compressed air in the second pressure accumulating chamber 20 and supply it to a pressure accumulating chamber 2, wherein the arrangement further includes a nozzle 26 having an opening for releasing the compressed air, an air passage 27 leading from this nozzle 26 to the first pressure accumulating chamber 2 or second pressure accumulating chamber 20, and a relief valve 25 to control the release of he compressed air from the nozzle 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving machine for driving a fastener such as a nail.

[0002]

2. Description of the Related Art FIG. 10 shows a driving machine proposed in Japanese Patent Application No. 11-073400 previously filed by the present applicant.
This driving machine drives a piston 8 movably provided in a cylinder 4 by compressed air in a first pressure accumulating chamber 2 provided in a main body 1, and drives a stopper 6 by a drive bit 7. A second pressure accumulating chamber 20 capable of accumulating compressed air having a pressure higher than the air pressure usable in the main body 1; an air inlet 16 connectable to an air compressor via an air hose or the like; A communication control valve 22 for controlling the communication between the pressure accumulation chamber 20 and the air intake 16, and a pressure reducing valve 21 for reducing the pressure of the compressed air in the second pressure accumulation chamber 20 and supplying the compressed air to the first pressure accumulation chamber 2 are provided. I have. This driving machine can be used even when it is not connected to an air compressor by an air hose or the like, and has a feature that the workability is good and the compressed air can be easily filled because there is no trouble of the air hose. It also discloses a configuration in which a discharge valve for releasing the compressed air in the second pressure accumulating chamber 20 to the atmosphere after use is provided.

[0003] FIG. 11 is a Japanese Patent Application Laid-Open No. Hei 1 (1994) filed by the present applicant.
1 shows a driving machine proposed in No. 0-109280. This driving machine has a built-in air duster mechanism as a driving machine capable of performing cleaning by blowing off wood chips and the like with an air duster and driving work by the driving machine with one tool.
This driving machine is used with the air hose connected to the driving machine, and cannot be used without the air hose.

[0004]

In the driving machine shown in FIG. 10, since the compressed air is accumulated in the main body as described above, the compressed air in the body is easily released into the atmosphere after the driving operation. A structure that can discharge air is desirable, and a structure that can release the compressed air inside the fuselage by operating the discharge valve as much as possible after the driving operation is desirable.

[0005] The driving machine shown in Fig. 11 has a built-in air duster mechanism and is very convenient. However, it cannot be used unless an air hose is connected, and is limited by the length of the air hose and the installation location of compressed air. There was a disadvantage of poor workability.
Above all, cleaning with an air duster requires the nozzle to be used in various directions in accordance with the cleaning location, and the air hose is particularly troublesome.

An object of the present invention is to eliminate the disadvantages of the driving machine having the second pressure accumulating chamber and the driving machine with an air duster and to provide a driving machine having a simple structure and easy operation.

[0007]

An object of the present invention is to provide a first pressure accumulating chamber provided in a main body, a second pressure accumulating chamber capable of accumulating compressed air having a pressure higher than an air pressure usable by the main body, and an air hose and the like. An air inlet that can be connected to the air compressor via the air compressor, a communication control valve that controls the communication between the second pressure accumulating chamber and the air inlet, and the pressure of the compressed air in the second pressure accumulating chamber is reduced and supplied to the first pressure accumulating chamber. A pressure reducing valve that drives a piston movably provided in the cylinder up and down by compressed air in the first pressure accumulating chamber, and drives a stop by a drive bit mounted on the piston. A nozzle having an opening for discharging air, an air passage communicating the nozzle with the first pressure accumulation chamber or the second pressure accumulation chamber, and a discharge valve for controlling discharge of compressed air from the nozzle are operably provided. Achieved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the driving machine according to the present invention will be described with reference to FIGS.

[0009] Behind the handle portion 13 of the main body 1, an air inlet 16 is provided which can be connected to an air compressor via an air hose 50 and a second pressure accumulating chamber 20 communicating with the first pressure accumulating chamber 2. A pressure reducing valve 21 is provided between the first pressure accumulating chamber 2 and the second pressure accumulating chamber 20, and the second pressure accumulating chamber 20 and the air intake 16 are provided.
Between the compressed air in the second pressure accumulating chamber 20 and the air inlet 1
A check valve 22 that does not flow out to the side 6 is provided. First
The pressure accumulating chamber 2 and the second pressure accumulating chamber 20 are connected via a pressure-reducing valve 21 to reduce the pressure of the compressed air in the second pressure accumulating chamber 20.
Is to be introduced.

As shown in FIG. 2, a check valve 22 provided between the second pressure accumulating chamber 20 and the air intake 16 has a urethane ball 27 serving as a valve body and a check valve 22 always in a closed position. It is composed of a spring 33 for urging the urethane ball 27 rearward. When the pressure at the air inlet 16 is higher than the pressure at the second pressure accumulating chamber 20, the urethane ball 27 moves toward the second pressure accumulating chamber 20 against the urging force of the spring 33, and the check valve 22 is opened. The compressed air is supplied from the air compressor into the second pressure accumulating chamber 20 through the air inlet 16 and the check valve 22. On the other hand, when the pressure on the side of the second pressure accumulating chamber 20 is higher than or substantially equal to the pressure on the side of the air inlet 16, the check valve 22 is in a closed state, and compressed air flows into the second pressure accumulating chamber 20 from the air inlet 16. There is no inflow and the compressed air in the second pressure accumulating chamber 20 does not flow out to the air intake 16 side.

The case where an air hose 50 connected to an air compressor is connected to the air inlet 16 will be described.

As described above, the operation of the check valve 22 causes the pressure in the second accumulator chamber 20 to be compressed by the air compressor until the pressure in the second accumulator chamber 20 becomes higher than the pressure on the air inlet 16 side. Air is supplied. The compressed air stored in the second pressure accumulating chamber 20 is supplied into the first pressure accumulating chamber 2 via a pressure reducing valve 21 provided between the first pressure accumulating chamber 2 and the second pressure accumulating chamber 20.

As shown in FIG. 3 and FIG.
Urethane balls 28 for opening and closing the communication between the pressure accumulating chamber 2 and the second pressure accumulating chamber 20, and the urethane balls 28 are connected to the first pressure accumulating chamber 2 and the second pressure accumulating chamber 2.
A spring 31 that constantly urges forward so as to cut off communication with the pressure accumulating chamber 20, a slidably provided urethane ball 2
A regulator piston 29 for controlling the piston 8 and a spring 30 for urging the regulator piston 29 rearward are provided. Regulator piston 29 is spring 3
The pressure is always urged to move to the urethane ball 28 side by 0, and is urged forward by the compressed air in the first pressure accumulation chamber 2 so as to move away from the urethane ball 28.

In the pressure reducing valve 21 shown in FIG. 3, the regulator piston 29 is located on the left side in the figure against the urging force of the spring 30, and the communication between the first pressure accumulating chamber 2 and the second pressure accumulating chamber 20 is cut off. It is in the state that was done. At this time, the inside of the first pressure accumulating chamber 2 is at the maximum pressure (8 kg / cm ² in the present embodiment), and the regulator piston 29 is attached to the spring 30 when the pressure in the first pressure accumulating chamber 2 is near the maximum pressure. It is configured to slide away from the urethane ball 28 against the force.

When the driving machine performs a driving operation and the pressure in the first pressure accumulating chamber 2 decreases, the urging force of the compressed air in the first pressure accumulating chamber 2 applied to the regulator piston 29 becomes weaker than the urging force of the spring 30. , Regulator piston 2
9 slides to the urethane ball 28 side, and as shown in FIG.
8, the urethane ball 28 is moved backward against the urging force of the spring 31 to make the first pressure accumulating chamber 2 and the second pressure accumulating chamber 20 communicate with each other.

The compressed air in the second accumulator 20 is supplied to the pressure reducing valve 21.
The pressure in the first pressure accumulating chamber 2 is increased through the first pressure accumulating chamber 2. When the pressure in the first pressure accumulating chamber 2 rises and reaches the maximum pressure, the regulator piston 29 operates again, and the pressure reducing valve 21 moves between the first pressure accumulating chamber 2 and the second pressure accumulating chamber. The communication with the chamber 20 is cut off.

That is, when the pressure in the second pressure accumulating chamber 20 which is the compressed air supply source of the first pressure accumulating chamber 2 is always higher than the maximum pressure of the first pressure accumulating chamber 2, the pressure reducing valve 21 operates. The pressure in the first accumulator 2 always becomes the maximum pressure.

First, a description will be given of a case where the driving operation is performed with the air hose 50 connected to the air compressor connected to the air inlet 16.

As described above, the pressure in the first pressure accumulating chamber 2 reaches the maximum pressure, and when the driving machine operates and the pressure in the first pressure accumulating chamber 2 decreases, the compressed air in the second pressure accumulating chamber 20 is reduced via the pressure reducing valve 21. Is supplied into the first pressure accumulating chamber 2, whereby the second pressure accumulating chamber 20
When the internal pressure decreases, the air hose 50, the air intake 16
Compressed air from the air compressor is supplied to the second pressure accumulating chamber 20 via the check valve 22, and the first pressure accumulating chamber 2 always maintains the maximum pressure.

Next, a description will be given of a case where the air hose 50 is detached from the air inlet 16, the connection between the driving machine and the air compressor is released, and the driving operation is performed.

Since the pressure in the second pressure accumulating chamber 20 is higher than the pressure in the first pressure accumulating chamber 2 as described above, the pressure in the first pressure accumulating chamber 2 is increased by the driving operation of the driving machine. When the pressure decreases, the compressed air in the second pressure accumulating chamber 20 is reduced by the pressure reducing valve 2.
1 is supplied into the first pressure accumulating chamber 2 through the second pressure accumulating chamber 20.
Until the internal pressure becomes equal to the maximum pressure in the first pressure accumulating chamber 2, the pressure is supplied to the first pressure accumulating chamber 2 and the driving is performed. When the driving is further continued, the pressures in the first pressure accumulating chamber 2 and the second pressure accumulating chamber 20 are both lowered, and the driving is performed.

If the driving operation is further continued and the pressure finally falls below the working pressure, a sufficient output cannot be obtained, and the driving of the stopper 6 cannot be performed. At that time, the air hose 50 connected to the air compressor may be connected to the air inlet 16 again, and the compressed air may be refilled in the first accumulator 2 and the second accumulator 20.

As described above, the driving machine of the present invention stores high-pressure compressed air in the second pressure accumulating chamber 20, decompresses the high-pressure compressed air with the pressure reducing valve 21, supplies the compressed air to the first pressure accumulating chamber 2, and uses this as a power source. Since the driving operation is performed, even if the connection of the air hose 50 is disconnected, there is an effect that a large number of driving operations are performed.

As described above, a large number of driving operations can be performed in a state where the air compressor is once connected and released, or in a state where the air compressor is connected as usual, and the length of the air hose 50 can be reduced. The limitation of the driving work range due to the installation location of the air compressor and the like is released, and the workability can be improved.

Further, as shown in FIGS. 1, 5 and 6, in the first pressure accumulating chamber 2 of the main body 1, the driving machine is operated by the thumb or the index finger while holding the driving machine with one hand. An operator 24 of the discharge valve 25 is provided as possible. A nozzle 26 is provided in front of the main body 1, and the nozzle 26 and the discharge valve 25 communicate with each other through an air passage 27.
Reference numeral 5 communicates with the first pressure accumulating chamber 2.

Next, the dust removing operation of the air duster mechanism having the above configuration will be described.

First, the nozzle 26 is pointed to the place where dust removal is to be performed, and the operator 24 of the discharge valve 25 is pressed with the hand holding the main body, and the compressed air stored in the first pressure accumulation chamber 2 and the second pressure accumulation chamber 20 is discharged. It is rapidly discharged from the opening at the tip of the nozzle 26 through the air passage 27, and removes dust, wood chips, and the like at a predetermined location.

In the same manner as the above-mentioned driving operation, this driving machine can perform dust removal work in a state where it is once connected to the air compressor and released, or in a state where the air compressor is connected as usual. Thus, the limitation of the working range due to the length of the air hose 50 and the installation location of the air compressor is released, and the workability can be improved.

Next, a method for releasing the compressed air in the driving machine body 1 to the atmosphere when the operation of driving a fastener such as a nail is completed will be described.

The compressed air is released by pressing the operating element 24 and opening the discharge valve 25 in the same manner as in the dust removal operation described above.

When the operator 24 is pushed and the release valve 25 is opened, the first accumulator 2 is communicated with the atmosphere, and the compressed air in the first accumulator 2 is discharged to the atmosphere. When the pressure in the first pressure accumulating chamber 2 decreases, the pressure reducing valve 21 operates, the compressed air in the second pressure accumulating chamber 20 flows into the first pressure accumulating chamber 2, and if the discharge valve 25 is opened, finally, The compressed air accumulated in the second pressure accumulating chamber 20 is discharged to the atmosphere through the pressure reducing valve 21 and the first pressure accumulating chamber 2.

7 to 9 show another embodiment of the driving machine according to the present invention.

The driving machine shown in FIG. 7 has a second pressure accumulating chamber 20 in a main body 1 provided with an air inlet 16, a pressure reducing valve 21 and a check valve 22.
The air passage 61 is provided between the pressure reducing valve 21 and the check valve 22, and an attachment / detachment device 60 a communicating with the air passage 61 is provided.

The second pressure accumulating chamber 20 is provided with an air inlet 60b which can be engaged with the attachment / detachment device 60a. By engaging the attachment / detachment device 60a with the air intake 60b, the air intake 16 and the check valve are provided. Compressed air supplied from the air compressor via 22 flows into the second accumulator 20.

In the driving machine according to this embodiment, the second pressure accumulating chamber 20 can be arbitrarily removed, so that the relatively large second accumulating chamber 20 can be removed.
Problems caused by the existence of the pressure accumulating chamber 20 can be eliminated. Other functions and effects are the same as those of the embodiment shown in FIGS.

FIG. 8 shows a configuration in which the second pressure accumulating chamber 20 can be attached to and detached from a driving machine provided with a pressure reducing valve 21 in the main body 1.
The second pressure accumulating chamber 20 is provided with a detachable device 60 capable of engaging with the air inlet 16, an air inlet 63 having the same shape as the air inlet 16 provided in the main body 1, and a check valve 22. The same operational effects as those of the embodiment shown in FIG. Other functions and effects are the same as those of the embodiment shown in FIGS.

FIG. 9 shows a conventional driving machine having a second pressure accumulating chamber 20.
As shown in the figure, the second pressure accumulating chamber 20 has a configuration in which an air inlet 63, a pressure reducing valve 21, a check valve 22, and a detachable device 60 are provided. Other functions and effects are the same as those of the embodiment shown in FIGS.

Further, in the embodiment shown in FIGS. 1 to 9, the release valve 25 is provided in the first pressure accumulating chamber.
5 may be provided in the second pressure accumulation chamber 20. Release valve 25
When provided in the pressure accumulating chamber 20, when the discharge valve 25 is opened, the second pressure accumulating chamber 20 is communicated with the atmosphere, and the compressed air in the second pressure accumulating chamber 20 is discharged to the atmosphere. When the pressure in the second pressure accumulating chamber 20 decreases, the compressed air in the first pressure accumulating chamber 2 flows into the second pressure accumulating chamber 20 via the pressure reducing valve 21, and if the discharge valve 25 is opened, finally, The compressed air accumulated in the first accumulator 2 is also discharged into the atmosphere through the pressure reducing valve 21 and the second accumulator 20. Further, by providing the discharge valve 25 in the second pressure accumulating chamber 20, compared with providing the discharge valve 25 in the first pressure accumulating chamber 2, high-pressure compressed air can be discharged from the nozzle 26,
There is a high dust removing effect.

[0039]

As described above, according to the present invention, in each of the driving operation and the dust removing operation, the operation is performed in either the state where the air compressor is connected or the state where the connection with the air compressor is released. It is possible to provide a driving machine that can be used even in a state where it is not connected to an air compressor by an air hose or the like, has good workability, and can easily perform filling of compressed air. .

Further, a single valve is used as a discharge valve for discharging the compressed air in the body to the atmosphere and emptying the inside of the body and a discharge valve for dust removal work with the air duster. In addition, the structure is simplified, which contributes to the lightening, downsizing, and failure reduction of the driving machine.

Further, the discharge valve for discharging the compressed air in the body to the atmosphere to evacuate the inside of the body and the discharge valve for dust removal work with the air duster are used as one valve. Normally, at the end of the driving operation, the driving place and the work place are cleaned. However, since the driving machine of the present invention has a built-in air duster function, the cleaning operation can have a built-in air duster function. Therefore, at the time of cleaning work after the completion of the driving operation, the discharge valve is operated, so that the compressor inside the driving machine main body can also be discharged into the atmosphere at that time, and if the discharge valve is continuously operated, the compressed air inside the main body is discharged. Can be empty. Therefore, the discharge valve operation after the driving operation can be performed at the same time as the cleaning operation, so that there is no need to bother to operate the discharge valve, and various operational effects can be obtained, such as a decrease in forgetting to release the compressed air inside the main body after the operation.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing an embodiment of the driving machine of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is an enlarged view of a main part showing an operation state of the pressure reducing valve shown in FIG. 3;

FIG. 5 is an enlarged view of a main part of FIG. 1;

FIG. 6 is a sectional view taken along line AA of FIG. 1;

FIG. 7 is a sectional side view showing another embodiment of the driving machine of the present invention.

FIG. 8 is a sectional side view showing another embodiment of the driving machine of the present invention.

FIG. 9 is a sectional side view showing another embodiment of the driving machine of the present invention.

FIG. 10 is a cross-sectional side view showing an example of a driving machine previously applied by the present applicant.

FIG. 11 is a sectional side view showing an example of a conventional driving machine.

[Explanation of symbols]

2 is a first accumulator, 4 is a cylinder, 5 is a main valve, 7 is a drive bit, 8 is a piston, 16 is an air intake, 20 is a second accumulator, 21 is a pressure reducing valve, 22 is a check valve, 24 Is an operator, 25 is a nozzle, 27 is an air passage, and 60 is a detachable device.

Claims (4)

[Claims] 1. A first pressure accumulating chamber provided in a main body, a second pressure accumulating chamber capable of accumulating compressed air having a pressure higher than an air pressure usable by the main body, and connectable to an air compressor via an air hose or the like. An air intake, a communication control valve for controlling the communication between the second pressure accumulation chamber and the air intake, and a pressure reducing valve for reducing the pressure of the compressed air in the second pressure accumulation chamber and supplying the compressed air to the first pressure accumulation chamber. 1
A driving machine that drives a piston movably provided in the cylinder up and down by compressed air in a pressure accumulating chamber, and drives a stopper with a drive bit mounted on the piston. A driving tool provided with a nozzle having a nozzle, an air passage communicating the nozzle with the first pressure accumulation chamber or the second pressure accumulation chamber, and a discharge valve for controlling discharge of compressed air from the nozzle. . 2. The driving machine according to claim 1, wherein a member having the second pressure accumulating chamber, the air inlet, the communication control valve, and the pressure reducing valve is provided separately from the main body, and is detachable from the main body. 3. The pressure reducing valve is provided in a main body and a second valve is provided.
The driving machine according to claim 1, wherein a member having a pressure accumulating chamber, an air inlet, and a valve is provided separately from the main body, and is detachable from the main body. 4. The communication control valve according to claim 1, wherein the communication control valve is a check valve that functions to prevent compressed air in the second pressure accumulating chamber from flowing out of the air intake. Driving machine.