JP6870495B2 - Pneumatic tool with air duster - Google Patents

Description

The present invention relates to a pneumatic tool including an air duster that ejects air from an outlet using compressed air supplied from the outside.

This type of tool is equipped with an air duster that uses the compressed air supplied to the air chamber to drive the fastener and also uses the compressed air supplied to the air chamber to eject air from the outlet. It has been known.

In such tools, lubrication oil is lubricated to the mechanism for driving the fastener and feeding the fastener. For this reason, there is a problem that the oil that has flowed into the air chamber enters the pipeline of the air duster, and the oil is ejected together with the air from the ejection port to contaminate the finishing material.

As a countermeasure against such a problem, in Patent Document 1, a branch pipeline is formed inside a joint for taking in compressed air from the outside, one of the branch pipelines is connected to a striking mechanism, and the other of the branch pipelines is an air duster. A structure for supplying compressed air to these two operating mechanisms by connecting to the mechanism is disclosed. By completely separating the supply path of the compressed air in this way, it is possible to prevent the oil lubricated to the striking mechanism from entering the supply path on the air duster side, and the oil is ejected together with the air of the air duster to contaminate the finishing material. Can be prevented.

Japanese Unexamined Patent Publication No. 2009-14066

However, in the structure described in Patent Document 1 described above, there is a problem that the structure becomes complicated because a branch pipeline must be formed inside the joint.

Therefore, an object of the present invention is to provide a pneumatic tool with an air duster, which has a simple structure but can prevent oil lubricated from the striking mechanism from entering the supply path on the air duster side.

The present invention has been made to solve the above-mentioned problems, and has a striking mechanism for launching a fastener using compressed air supplied from the outside and ejection using compressed air supplied from the outside. It is provided with an air duster structure that ejects air from the outlet, a grip for the operator to grasp and grip, and an end cap portion provided at the rear end of the grip for connecting to a source of compressed air. A first supply path for supplying compressed air to the striking mechanism is provided inside the grip, and a second supply path for supplying compressed air to the air duster structure is provided inside the first supply path. The second supply port is provided with a first supply port for taking compressed air into the first supply path and a second supply port for taking compressed air into the second supply path. It is characterized in that it opens inside the grip and communicates with the first supply path.

The present invention is as described above. A second supply path for supplying compressed air to the striking mechanism is provided inside the grip, and a second supply path for supplying compressed air to the air duster structure is provided inside the first supply path. A supply channel was provided. According to such a configuration, it is not necessary to provide a branch pipeline, a check valve, or the like, so that the structure can be simplified.
Further, since the second supply port for taking the compressed air into the second supply path is opened inside the grip, clean air on the upstream side can be supplied to the air duster. Then, even if the oil flows into the air duster, the clean oil flows into the air duster, so that it is possible to prevent the finishing material from becoming dirty. That is, the oil supplied from the grip end or the like is flowed to the striking mechanism side through the first supply path. Therefore, the oil remaining in the grip is a relatively clean oil that has just been supplied, and even if the oil flows into the second supply port inside the grip, the oil is relatively clean. .. In other words, the oil staying on the striking mechanism side is also mixed with the oil that lubricated the sliding part, and is contaminated with impurities. Such contaminated oil is discharged from the second supply port. It can be prevented from flowing in.
If the first supply port for taking compressed air into the first supply path and the second supply port for taking compressed air into the second supply path are opened in directions that do not face each other. Since the second supply port can be provided at a position outside the flow of air and oil supplied from the first supply port and flowing through the first supply path, it is possible to prevent the lubricated oil from entering the air duster side. it can.

It is a side view of a pneumatic tool. It is sectional drawing of a pneumatic tool. It is a partially enlarged sectional view of a pneumatic tool. It is sectional drawing of the pneumatic tool which concerns on modification 1. FIG. It is sectional drawing of the pneumatic tool which concerns on modification 2. FIG. It is sectional drawing of the pneumatic tool which concerns on modification 3. It is (a) sectional view and (b) enlarged sectional view near the 2nd supply port of the pneumatic tool which concerns on modification 4. FIG. It is an enlarged perspective view near the 2nd supply port of the pneumatic tool which concerns on modification 4. FIG. It is (a) sectional view and (b) enlarged sectional view near the 2nd supply port of the pneumatic tool which concerns on modification 5. FIG. It is an enlarged perspective view near the 2nd supply port of the pneumatic tool which concerns on modification 5. FIG. It is sectional drawing of the pneumatic tool which concerns on modification 6. It is (a) sectional view and (b) enlarged sectional view near the 2nd supply port of the pneumatic tool which concerns on modification 7. FIG. It is a figure which shows the inside of the grip of the pneumatic tool which concerns on modification 8. It is (a) sectional view and (b) enlarged sectional view near the 2nd supply port of the pneumatic tool which concerns on modification 8. FIG. FIG. 5 is an enlarged perspective view of the vicinity of a second supply port of the pneumatic tool according to the modified example 8.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The pneumatic tool 10 according to the present embodiment uses compressed air supplied from the outside to launch a fastener, and has an air duster structure for ejecting air from an ejection port using compressed air supplied from the outside. I have. By providing the pneumatic tool 10 with an air duster structure in this way, it is possible to perform driving with a fastener and cleaning with an air duster without having to change the tool.

As shown in FIG. 1, the pneumatic tool 10 can be operated by an output unit 11 having a striking mechanism 19 inside, a grip 12 provided so as to project in a direction orthogonal to the output unit 11, and a grip 12. A trigger 13 provided, a nose portion 14 provided so as to project to the tip of the output portion 11, a magazine 15 connected to the rear of the nose portion 14, and a pushable operation for operating the air duster structure are provided. The operation unit 17 is provided.

The striking mechanism 19 built in the output unit 11 operates the driver by using the force of compressed air, and the driver drives the fastener. The driver is movable in the direction of the nose portion 14 in order to launch the fastener. The driver who has moved in the driving direction launches the fastener set in the nose portion 14. The fastener punched out by the driver is ejected from the injection port 14a opened at the tip of the nose portion 14.

When the operator uses the pneumatic tool 10, the grip 12 is grasped and gripped, and the trigger 13 is pulled. By this operation, the striking mechanism 19 described above is activated to launch the fastener.

A connecting fastener is housed in the magazine 15, and the leading fastener of the connecting fastener is sequentially supplied in the direction of the nose portion 14 (directly below the driver before the driving operation).

The compressed air for operating the striking mechanism 19 and the air duster structure described above is supplied from an air supply source such as an air compressor. Specifically, an air supply air hose connected to a compressor or the like is connected to an end cap portion 16 provided at the rear end of the grip 12, and compressed air is supplied via the air hose. The compressed air supplied from the end cap portion 16 passes through the air supply path (first supply path 21 and second supply path 22 described later) formed inside the grip 12, and passes through the striking mechanism 19 and the air duster. Supplied to the structure.

Specifically, the plug connecting pipe 25 projects rearward from the end cap portion 16. The plug connecting pipe 25 is a pipe for connecting an air hose for supplying air. A connecting portion 25a to which an air hose can be connected is provided at the tip of the plug connecting pipe 25. The connecting portion 25a has an opening that communicates with the internal space of the grip 12, and is formed so that compressed air can be taken in from this opening when an air hose is connected to the connecting portion 25a.

Next, the striking mechanism 19 according to the present embodiment includes a head valve 40, an air chamber 41, a cylinder 42, and a piston 43.

The head valve 40 is a tubular valve body for controlling the inflow of compressed air into the cylinder 42. The head valve 40 is arranged on the outer periphery of the cylinder 42 and is slidable in the axial direction. Further, the air chamber 41 is an air chamber for storing compressed air for urging the piston 43. The air chamber 41 is always in communication with the first supply path 21, which will be described later.

In the striking mechanism 19, when the trigger 13 is operated, the head valve 40 operates in the opening direction, and the compressed air in the air chamber 41 is supplied to the upper surface of the piston 43 in the cylinder 42. As a result, the piston 43 is driven downward, and the nail is hit by the driver fixed to the tip of the piston 43.

Further, in the air duster structure according to the present embodiment, when the operation unit 17 is operated, compressed air is ejected from an ejection port (not shown) that opens near the nose portion 14. As shown in FIG. 1, the operation unit 17 according to the present embodiment is arranged at a position where the operator can operate the grip 12 by the hand holding the grip 12. Specifically, when the grip 12 is gripped by the right hand, it is arranged at a position where it can be operated by the thumb of the right hand.

The operation unit 17 is for operating the on-off valve 18 shown in FIG. The on-off valve 18 slides in conjunction with the pressing operation of the operation unit 17, shuts off or opens the supply path of the compressed air to the ejection port, and can adjust the supply amount of the compressed air to the ejection port. It is configured as follows. The on-off valve 18 is urged in the protruding direction by an urging member such as a spring. By this urging force, the on-off valve 18 is configured to maintain a state in which the supply path of the compressed air is cut off in a natural state. Then, when the operation unit 17 is pushed against the urging force of the urging member, the on-off valve 18 moves in the direction of opening the pipeline. Since the upstream side of the on-off valve 18 communicates with the second supply passage 22 described later, and the downstream side of the on-off valve 18 communicates with the air duster pipeline extending to the ejection port. When the on-off valve 18 opens the pipeline, compressed air is supplied from the second supply path 22 to the ejection port.

By the way, as shown in FIG. 2, the inside of the grip 12 according to the present embodiment is configured to be able to store the compressed air supplied from the air supply source. The space storing the compressed air forms a first supply path 21 for supplying the compressed air to the striking mechanism 19.

The first supply port 23 for taking compressed air into the first supply path 21 is open at the tip of the introduction pipeline 27 protruding from the end cap portion 16 to the inside of the grip 12. A connecting pipe 26 formed inside the plug connecting pipe 25 is arranged on the upstream side of the introduction pipe 27. The introduction pipe 27 and the connection pipe 26 are straight pipes arranged parallel to each other, but are arranged so as to be offset from each other. In the present embodiment, the first supply port 23, which is the outlet of the introduction pipe 27, and the supply port 26a, which is the outlet of the connection pipe 26, are arranged so as not to overlap when projected in the axial direction. There is. With such a configuration, the compressed air supplied from the connecting pipe 26 flows to the introduction pipe 27 via the supply port 26a, and then from the first supply port 23 to the first supply line 21. It is flowing.

Further, a pipe 28 is attached to the inside of the first supply path 21. The hollow portion of the pipe 28 forms a second supply path 22 for supplying compressed air to the air duster structure.

Further, the opening on the upstream side of the pipe 28 forms a second supply port 24 for taking compressed air into the second supply path 22. On the other hand, the downstream end of the pipe 28 is connected to the pipeline leading to the upstream side of the on-off valve 18.

In the present embodiment, as shown in FIG. 3, the tip portion on the upstream side of the pipe 28 is fitted and fixed to the end cap portion 16. Specifically, a recessed portion 33 is provided on the inner surface of the end cap portion 16, and the tip portion on the upstream side of the pipe 28 is inserted into the recessed portion 33 to fix the recessed portion 33. Therefore, the second supply port 24 faces the inner surface of the end cap portion 16. However, a gap 32 is provided between the second supply port 24 and the inner surface of the end cap portion 16. The gap 32 communicates with the inside of the grip 12, that is, the first supply path 21, and is configured so that compressed air can flow into the gap 32 from the first supply path 21. Therefore, compressed air is introduced into the second supply path 22 from the second supply port 24 through the gap 32.

According to such an embodiment, it is not necessary to provide a branch pipeline, a check valve, or the like, so that the structure can be simplified. Further, since the second supply port 24 is opened inside the grip 12, clean air on the upstream side can be supplied to the air duster. Moreover, since the first supply port 23 and the second supply port 24 are open in directions that do not face each other, air and oil supplied from the first supply port 23 and flowing through the first supply path 21 A second supply port 24 can be provided at a position out of the flow. Therefore, it is possible to prevent the lubricated oil from entering the air duster side.

Moreover, since the second supply port 24 opens on the end cap portion 16 side (right side in FIG. 3) of the first supply port 23 when viewed in the longitudinal direction of the grip 12, the flow of the first supply path 21 Since the second supply port 24 can be provided at a position deviated from the air duster side, it is possible to effectively prevent the lubricated oil from entering the air duster side.

(Modification example 1)
In the above-described embodiment, the opening on the upstream side of the pipe 28 forms the second supply port 24, and the compressed air is introduced into the second supply path 22 through the gap 32 facing the second supply port 24. However, the present invention is not limited to this, and the second supply port 24 may be formed in the middle of the pipe 28.

That is, as shown in FIG. 4, a second supply port 24 that opens laterally is formed in the middle of the pipe 28, and compressed air is passed through the second supply port 24 to the second supply path 22. It may be introduced to. By opening the second supply path 22 sideways, the second supply path 22 is opened in a direction different from the flow path direction of the first supply path 21.

The second supply port 24 according to the present embodiment is open on a surface opposite to the surface facing the first supply port 23. Therefore, since the second supply port 24 is provided at a position deviated from the flow of the first supply path 21, it is possible to effectively prevent the lubricated oil from entering the air duster side.

In this modification 1, it is not necessary to provide the gap 32 as shown in FIG. 3, and the opening on the upstream side of the pipe 28 may be closed by the inner surface of the end cap portion 16.

(Modification 2)
In the above-described embodiment, the upstream end of the pipe 28 is fitted and fixed to the end cap portion 16, but the present invention is not limited to this, and the upstream end of the pipe 28 may not be fixed.

That is, as shown in FIG. 5, the upstream end of the pipe 28 is made to protrude into the first supply path 21, and the opening on the upstream side of the pipe 28 is used to make the second supply port 24. May be formed.

Even in this case, if the first supply port 23 and the second supply port 24 are arranged at positions where they do not overlap each other when projected in the axial direction, the first supply path 21 Since the second supply port 24 can be provided at a position out of the flow, it is possible to prevent the lubricated oil from entering the air duster side.

(Modification example 3)
In the above embodiment, the pipe 28 is used to form the second supply path 22, but the present invention is not limited to this.

For example, as shown in FIG. 6, the second supply path 22 may be formed by providing the partition wall 29 that separates the first supply path 21 and the second supply path 22.

Even in this case, if the first supply port 23 and the second supply port 24 are arranged at positions where they do not overlap each other when projected in the axial direction, the first supply path 21 Since the second supply port 24 can be provided at a position out of the flow, it is possible to prevent the lubricated oil from entering the air duster side.

(Modification example 4)
As shown in FIG. 7, an oil reservoir 30 may be provided in the vicinity of the second supply port 24.

As shown in FIG. 8, the oil reservoir 30 according to this modification is provided near the tip of the pipe 28, and the flange portion 30a protruding in the circumferential direction and the pipe 28 from the end edge of the flange portion 30a. A peripheral wall portion 30b formed so as to rise toward the tip end is provided. With such a configuration, a groove 30c for catching a liquid such as oil is formed between the outer periphery of the pipe 28 and the peripheral wall portion 30b. The groove 30c opens in the same direction as the second supply port 24.

According to such a configuration, even if the oil adheres to the vicinity of the second supply port 24, the oil can be caught in the groove 30c, so that the lubricated oil can be prevented from entering the air duster side.

In order to attract viscous oil, the smaller the width of the groove 30c, the better. Specifically, it is desirable to form the diameter smaller than the diameter of the second supply port 24.

Further, a large amount of oil can be stored by deepening the groove 30c.

(Modification 5)
The oil reservoir 30 according to the above-described fourth modification is provided with a simple circumferential groove 30c, but the groove 30c may be provided with a discharge hole 30d for discharging the liquid.

For example, as shown in FIGS. 9 and 10, the discharge hole 30d may be formed so as to penetrate the flange portion 30a. The discharge hole 30d is formed to penetrate from the upstream to the downstream along the air flow of the first supply path 21.

According to such a configuration, when air flows through the first supply path 21, the liquid accumulated in the groove 30c can be discharged. Since the discharged liquid (oil) flows in the direction of the striking mechanism 19, it is possible to prevent the oil from entering the second supply path 22. Further, since the oil accumulated in the groove 30c becomes mist when discharged from the discharge hole 30d, it easily flows in the direction of the striking mechanism 19 together with the air.

(Modification 6)
In the above embodiment, the straight pipe 28 is used to form the second supply path 22, but the present invention is not limited to this.

For example, as shown in FIG. 11, a substantially J-shaped pipe 28 may be used to form the second supply path 22.

Further, as shown in FIG. 11, the second supply port 24 may be opened in the direction opposite to the end cap portion 16 (leftward in FIG. 11) when viewed in the longitudinal direction of the grip 12. Good.

With this configuration, the second supply port 24 can be provided at a position deviating from the flow of the first supply path 21, so that it is possible to prevent the lubricated oil from entering the air duster side.

(Modification 7)
As shown in FIG. 12, a return shape 31 may be provided in the vicinity of the second supply port 24 to prevent the liquid from entering the second supply port 24.

The return shape 31 according to this modification is formed by attaching a component to the tip of a substantially J-shaped pipe 28. This component includes a bottom plate portion 31a through which the pipe 28 penetrates, and a protrusion portion 31b that protrudes from the outer peripheral portion of the bottom plate portion 31a toward the anti-tip direction (direction of the first supply port 23) of the pipe 28. With such a configuration, a recess 31c is formed around the pipe 28.

According to such a configuration, even if the oil flows along with the flow of the compressed air from the first supply port 23, the oil is captured by the return shape 31 and is difficult to flow toward the second supply port 24. Therefore, it is possible to prevent the lubricated oil from entering the air duster side.

(Modification 8)
As shown in FIGS. 13 to 15, a second supply path 22 and a second supply port 24 may be provided around the exhaust pipe 45. That is, in this modification, as shown in FIG. 14A, the exhaust pipe 45 is arranged inside the first supply path 21. The exhaust pipe 45 is for exhausting the air used for driving the fastener, and is arranged along the longitudinal direction of the grip 12. An exhaust path 45a is formed inside the exhaust pipe 45.

A ring member 46 as shown in FIGS. 14 (b) and 15 is fixed to the outer peripheral portion of the exhaust pipe 45. The ring member 46 is arranged on the downstream side (far side from the end cap portion 16) of the first supply path 21 from the middle when viewed in the longitudinal direction of the exhaust pipe 45.

As shown in FIG. 14B, the ring member 46 is attached so as to form a space between the ring member 46 and the outer periphery of the exhaust pipe 45. The space formed between the inner circumference of the ring member 46 and the outer circumference of the exhaust pipe 45 forms a part of the second supply path 22. Although not particularly shown, the second supply path 22 extends to the upstream side of the on-off valve 18.

Further, the ring member 46 is provided with a second supply port 24 that communicates with the second supply path 22. The second supply port 24 opens laterally inside the first supply path 21. By opening the second supply path 22 sideways, the second supply path 22 is opened in a direction different from the flow path direction of the first supply path 21. In the present embodiment, a plurality of second supply ports 24 are arranged at intervals in the circumferential direction of the ring member 46.

As shown in FIG. 15, flange-shaped ribs are formed on the outer periphery of the ring member 46. The ring member 46 according to the present embodiment includes at least two ribs, a first rib 47 and a second rib 48.

The first rib 47 is for preventing oil from flowing into the second supply port 24. The first rib 47 is provided on the upstream side of the second supply port 24 when viewed in the air supply direction in the first supply path 21.

Further, the second rib 48 is a rib having a second supply port 24 formed on the top thereof. As shown in FIG. 15, the second rib 48 is partially missing in the circumferential direction, whereby a relief groove 48a is formed.

According to such a configuration, even if the oil flows along with the flow of the compressed air from the first supply port 23, the oil cannot reach the second supply port 24 unless it gets over the first rib 47. In other words, it is blocked by the first rib 47, making it difficult for oil to flow into the second supply port 24.

Further, even if the oil gets over the first rib 47, the oil flows downstream from the escape groove 48a, so that it becomes difficult for the oil to flow into the second supply port 24 formed on the top of the second rib 48. ing. Therefore, since it is difficult for the oil to enter the second supply path 22, it is possible to prevent the oil from being ejected together with the air of the air duster.

10 Pneumatic tool 11 Output part 12 Grip 13 Trigger 14 Nose part 14a Injection port 15 Magazine 16 End cap part 17 Operation part 18 On-off valve 19 Strike mechanism 21 First supply path 22 Second supply path 23 First supply port 24 Second supply port 25 Plug connection pipe 25a Connection part 26 Connection pipe 26a Supply port 27 Introduction pipe 28 Pipe 29 Partition 30 Oil reservoir 30a Flange part 30b Peripheral wall part 30c Groove 30d Discharge hole 31 Return shape (protrusion)
31a Bottom plate 31b Protruding part 31c Recessed 32 Gap 33 Recessed part 40 Head valve 41 Air chamber 42 Cylinder 43 Piston 45 Exhaust pipe 45a Exhaust path 46 Ring member 47 First rib (protrusion)
48 2nd rib 48a Relief groove

Claims (8)

A striking mechanism for launching fasteners using compressed air supplied from the outside,
An air duster structure that ejects air from the outlet using compressed air supplied from the outside,
A grip for the operator to grasp and grasp,
An end cap portion provided at the rear end portion of the grip for connecting to a source of compressed air,
With
A first supply path for supplying compressed air to the striking mechanism is provided inside the grip.
A second supply path for supplying compressed air to the air duster structure is provided inside the first supply path .
It is provided with a first supply port for taking compressed air into the first supply path and a second supply port for taking compressed air into the second supply path.
A pneumatic tool with an air duster, wherein the second supply port opens inside the grip and communicates with the first supply path. Wherein a first supply port, said a second supply port, characterized in that it opens in a direction not facing each other, duster with pneumatic tool according to claim 1. The pneumatic tool with an air duster according to claim 1, wherein the second supply port is opened in a direction different from the flow path direction of the first supply path. The pneumatic tool with an air duster according to claim 1, wherein the second supply port opens in a direction opposite to the end cap portion when viewed in the longitudinal direction of the grip. The pneumatic tool with an air duster according to claim 1, wherein the second supply port is open on the end cap portion side of the first supply port when viewed in the longitudinal direction of the grip. The invention according to any one of claims 1 to 5, wherein a protrusion for preventing the liquid from entering the second supply port is provided in the vicinity of the second supply port. Pneumatic tool with air duster. The pneumatic tool with an air duster according to any one of claims 1 to 6, wherein a groove for catching a liquid is provided in the vicinity of the second supply port. An exhaust pipe for exhausting the air used for driving the fastener is arranged inside the first supply path.
The pneumatic tool with an air duster according to any one of claims 1 to 7, wherein the second supply port is formed on an outer peripheral portion of the exhaust pipe.

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