CN103101030B - Driver - Google Patents

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Publication number
CN103101030B
CN103101030B CN201210460349.4A CN201210460349A CN103101030B CN 103101030 B CN103101030 B CN 103101030B CN 201210460349 A CN201210460349 A CN 201210460349A CN 103101030 B CN103101030 B CN 103101030B
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China
Prior art keywords
driver
sealing
main part
top cover
hood
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Active
Application number
CN201210460349.4A
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Chinese (zh)
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CN103101030A (en
Inventor
纸元顺平
西土典之
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Makita Corp
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Makita Corp
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Publication of CN103101030A publication Critical patent/CN103101030A/en
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Publication of CN103101030B publication Critical patent/CN103101030B/en
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  • Portable Nailing Machines And Staplers (AREA)

Abstract

The invention provides driver.In the driver of compressed gas-driven formula, for be arranged at main part rear portion hood for, the part existed beyond the exhaust outlet of existing band noise elimination wave filter produces the situation of Leakage Gas, in the present invention, prevent the portion gas beyond this exhaust outlet from leaking and realize the mute of this driver.Driver is formed as following structure: it is raw-material sealing (32) that the front end along the surrounding wall portion (31a) of hood (30) arranges with soft resin material by insert part forming, and sealing portion (32) is embedded in the sealing recess (16c) of top cover (16), thus prevent the Leakage Gas of the second row air chamber (26) of the part beyond the exhaust outlet (34) of band noise elimination wave filter (34a).

Description

Driver
Technical field
The present invention relates to the drivers such as the nailing machine using Compressed Gas as drive source.
Background technology
This driver possesses: tool body section, and this tool body section is built with the piston moved back and forth as drive source using Compressed Gas; Squeeze into portion, by the action of tool body section, this portion of squeezing into gets and squeezes into part; And handle portion, this handle portion is arranged with the state of stretching out towards side from the sidepiece of tool body section.This driver possesses following structure: by carrying out button pulling process to the switch lever of the base portion being arranged at handle portion, room supplying compressed gas on the piston of tool body section, utilize the thrust of Compressed Gas supplied to make to be arranged at moving down for the driver that impacts driver is instantaneous of piston, utilize the driver impact moved down to be supplied to of the portion of squeezing into and squeeze into part and this squeezed into part and get from the front end (exit wound of bullet) squeezing into portion.
After squeezing into, when removing the button pulling process to switch lever, cut off towards the supply of the Compressed Gas of room on piston, room on piston is communicated with air, thus, piston returns by being supplied to the Compressed Gas (returning gas) of room under piston in advance the end position that moves up, thus terminates a series of inputting.
Be combined with top cover at the rear portion of the body shell of tool body section, be provided with the hood of band noise elimination wave filter at this top cover.Compressed Gas indoor on piston is discharged by towards air via this hood.This hood is installed on top cover in the mode that can rotate, and at random can change discharge directions.
Such as in following patent document, disclose the prior art relevant to above-mentioned driver.According to the technology disclosed in this patent document, the protuberance elasticity with elastic recovery being arranged at hood is made to press on the upper surface of top cover, and with the state of the upper surface covering top cover, this hood is installed, thus, on piston the Compressed Gas of room can not part beyond the exhaust outlet of the hood mode that produces Leakage Gas be discharged.
Patent document 1: the practical new case of Japan logs in No. 2576552 publication
But, in above-mentioned existing structure, if the air pressure of Compressed Gas is normal pressure (about 8kg/cm 2) left and right then no problem, but be high pressure (the about 23kg/cm popularized gradually in recent years at the air pressure of Compressed Gas 2) when, the entirety of resinous hood under high pressure produces distortion etc., only can not guarantee enough sealings (air-tightness) by elasticity pressing protuberance, therefore, part beyond the exhaust outlet of band noise elimination wave filter may produce Leakage Gas, as a result, the problem of noise may be produced because of this Leakage Gas.
Summary of the invention
The object of the invention is to: even if when using the Compressed Gas of high pressure as drive source, also can guarantee the high leakproofness of the hood being with noise elimination wave filter, thus, exhaust is reliably discharged by towards air via noise elimination wave filter.
Above-mentioned problem is solved by following invention.
First technical scheme relates to a kind of driver, and this driver is built with the piston moved back and forth in cylinder body as drive source using Compressed Gas, and this driver possesses: top cover, and this top cover limits the upper room of cylinder body; And hood, this hood is installed along the rear surface of top cover, and has the exhaust outlet of being discharged towards air by the Compressed Gas in the exhaust chamber be formed between the two, and hood possesses: cover main part, and this cover main part has exhaust outlet; And sealing, sealing portion is arranged along the periphery of above-mentioned cover main part, and is at least connected to top cover when being vented by the pressure of Compressed Gas and seals airtightly, above-mentioned sealing with the soft material softer than cover main part for raw material.
According to the first technical scheme, cover main part and sealing with the different material of hardness for raw material are formed, sealing is using soft material as raw material to guarantee high leakproofness, on the other hand, cover main part is using the material of more hard as raw material to guarantee high rigidity relative to the Compressed Gas of high pressure, thereby, it is possible to guarantee the high leakproofness of hood relative to top cover, thus the Leakage Gas of the part beyond exhaust outlet can be prevented.
Like this, even if be not only the driver of driver high drive that normal pressure drives, the Leakage Gas of the part beyond the exhaust outlet that also reliably can prevent exhaust gas, thus can mute be realized.
Second technical scheme relates to a kind of driver, and in the first technical scheme, driver is formed as following structure: sealing is connected to top cover all the time, and plays function as cover main part relative to the positioning unit of top cover.
According to the second technical scheme, hood is kept relative to the position of top cover.Especially when being formed as making hood be arranged to rotate so that when at random can change discharge directions relative to top cover, by the positioning function of sealing, can prevent hood from inadvertently rotating and the situation of its discharge directions skew.
3rd technical scheme relates to a kind of driver, and in the second technical scheme, driver is formed as following structure: make the outer peripheral face of sealing be connected to top cover and seal.
According to the 3rd technical scheme, the sealing arranged by the periphery made along cover main part is because of pressure diametrically direction of expansion (the expanding direction the increased diametrically) elastic deformation and pressed on top cover of Compressed Gas, thus, sealed with high-air-tightness between this hood and top cover.
4th technical scheme relates to a kind of driver, and in the 3rd technical scheme, driver is engaged with cover main part by insert part forming.
According to the 4th technical scheme, by soft material insert part forming in taking hard material as the circumference of raw-material cover main part and integrally formed sealing.Owing to cover main part and sealing can be treated as parts, therefore, it is possible to improve assembleability and the maintainability of this hood and then raising driver.
5th technical scheme relates to a kind of driver, and in the 4th technical scheme, being provided with the soft material identical with sealing at the outer surface of cover main part is raw-material guard section.
According to the 5th technical scheme, being provided with soft elastic material at the outer surface of cover main part is raw-material guard section.By making this guard section play function as padded coaming, the impact such as when this driver drops to ground etc. can be absorbed, thus can alleviate or prevent this hood and then alleviate or prevent the damage of driver.
Accompanying drawing explanation
Fig. 1 is the longitudinal section of the driver entirety involved by present embodiment.
Fig. 2 is the top view that the driver involved by present embodiment is observed in arrow (II) direction from Fig. 1.
Fig. 3 is the inside enlarged drawing of head valve (headvalve) periphery.
Fig. 4 is Fig. 3 (IV) portion enlarged drawing, is the enlarged drawing of the sealing of hood.
Fig. 5 is the figure of other embodiment that sealing is shown.
Label declaration:
W ... squeeze into material; 1 ... driver (compressed air type nailing machine); 2 ... main part; 3 ... squeeze into portion; 4 ... handle portion; 4a ... hose coupling; 5 ... nail kit; 6 ... switch lever; 7 ... trigger valve; 7a ... valve rod; 8 ... pressure accumulating chamber; 10 ... body shell; 11 ... cylinder body; 12 ... piston; 13 ... driver; 14 ... gas supply road; 15 ... top dead centre bolster; 15a ... diaphragm seal; 16 ... top cover; 16a ... exhaust channel; 16b ... boss portion; 16c ... sealing recess; 17 ... Compress Spring; 18 ... lower dead center bolster; 19 ... check-valves; 20 ... head valve; 20a ... flange part; 20b ... sealing protuberance; 20c ... steam vent; 21 ... room on head valve; 22 ... return gas compartment; 22a ... return aperture; 23 ... room on cylinder body; 24 ... room under cylinder body; 25 ... first row air chamber; 26 ... second row air chamber; 30 ... hood; 31 ... cover main part; 31a ... surrounding wall portion; 31b ... sealing wall portion; 32 ... sealing; 33 ... hold-down screw; 34 ... exhaust outlet; 34a ... noise elimination wave filter; 35 ... guard shield; 36 ~ 38 ... sealing.
Detailed description of the invention
Secondly, based on Fig. 1 ~ Fig. 5, embodiments of the present invention are described.Driver 1 shown in Fig. 1 involved by present embodiment.This driver 1 is the nailing machine using Compressed Gas as drive source, possesses main part 2, squeezes into portion 3, handle portion 4 and nail kit 5.
At main part 2 built with columnar cylinder body 11; And the piston 12 utilizing Compressed Gas to move back and forth in this cylinder body 11.Cylinder body 11 with cross in columnar body shell 10 and be combined in body shell 10 top magnesium top cover 16 in mode in-built.Be provided with for impacting the driver 13 squeezing into part at the lower surface center of piston 12.Driver 13 extends downward in cylinder body 11 and the arrival of its front is squeezed in portion 3.
As shown in Figure 3, around the upper side of cylinder body 11, i.e. the inner circumferential side of top cover 16, with can the mode of displacement along the vertical direction built with columnar head valve 20.This head valve 20 has as the top making piston 12 (on the cylinder body room 23) function relative to the open and close valve of pressure accumulating chamber 8 opening and closing.Multiple Compress Spring 17 ~ 17 has been clamped between top cover 16 and the top of head valve 20.The direction that head valve 20 is closed relative to pressure accumulating chamber 8 towards room on cylinder body 23 by this Compress Spring 17 ~ 17 exerts a force.
At the outer peripheral face of head valve 20 in the flange part 20a be provided with stretching out shape for bearing the air pressure of pressure accumulating chamber 8 in the direction moved up (opening direction), at the inner peripheral surface of head valve 20, inner circumferential side complete cycle is provided with sealing protuberance 20b.In the upside of sealing protuberance 20b, around head valve 20, between the top of head valve 20 and flange part 20a, be provided with multiple steam vent 20c ~ 20c.
Room 23 on cylinder body and be provided with top dead centre bolster 15 in the upper inside surface of top cover 16, this top dead centre bolster 15 is for limiting the top dead centre of this piston 12 and absorbing the impact of the end that moves up of piston 12.Around this top dead centre bolster 15, throughout complete cycle, the state of stretching out towards side is provided with diaphragm seal 15a.
The state extended to side from the sidepiece of main part 2 is provided with handle portion 4.The front end of handle portion 4 is provided with hose coupling 4a, and this hose coupling 4a is for connecting the steam hose (omitting diagram) of Compressed Gas supply.The inside of handle portion 4 is provided with pressure accumulating chamber 8, and this pressure accumulating chamber 8 is for storing the Compressed Gas via steam hose supply.
The switch lever 6 of the trigger form of carrying out detaining pulling process for user with finger tip is provided with near the base portion of handle portion 4.Above this switch lever 6 and be that the base portion of handle portion 4 is provided with trigger valve 7, when when the button pulling process by switch lever 6, the valve rod 7a of trigger valve 7 is pressed into upward, trigger valve 7 is connected.When the button pulling process of cancel switch bar 6 and valve rod 7a returns downward time, trigger valve 7 disconnects.
When trigger valve 7 is connected, the gas supply road 14 being arranged at main part 2 is cut off from pressure accumulating chamber 8 and is communicated with air.Gas supply road 14 is communicated with the upper surface (on head valve room 21) of head valve 20.Thus, when trigger valve 7 is connected, on head valve, room 21 is communicated with air.On the contrary, when trigger valve 7 disconnects, gas supply road 14 is communicated with pressure accumulating chamber 8 thus Compressed Gas is supplied to gas supplies in road 14, thus, compresses air feed and is supplied to room 21 on head valve.
Like this, the operation of the on-off to trigger valve 7 undertaken by utilizing the operation of switch lever 6, carries out making Compressed Gas act on the state of the upper surface of head valve 20 and the switching between the state that the upper surface of head valve 20 is communicated with air.On the other hand, the Compressed Gas in pressure accumulating chamber 8 is acted on all the time at the lower surface of the flange part 20a of head valve 20.
Therefore, under the off-state of trigger valve 7, become and to supply road 14 and head valve supplying compressed gas in room 21 from pressure accumulating chamber 8 towards gas thus the state having air pressure in the upper surface effect of head valve 20.When under the state that the upper surface effect at head valve 20 has air pressure, head valve 20 by Compress Spring 17 active force and become closed condition.
On the other hand, when trigger valve 7 is connected and gas supply road 14 and head valve is communicated with air in room 21, the air pressure acting on the pressure accumulating chamber 8 of the lower face side of the flange part 20a of head valve 20 is greater than making a concerted effort of the Compress Spring 17 ~ 17 of the upper surface side acting on head valve 20, thus head valve 20 displacement upward.When head valve 20 displacement and when opening upward, from pressure accumulating chamber 8 via the side, bottom of head valve 20 and inner circumferential side thereof towards supplying compressed gas in room cylinder body 23.On present dynasty's cylinder body in room 23 during supplying compressed gas, piston 12 by Compressed Gas thrust and move down.Moved down by piston 12, driver 13 moves down integratedly, utilizes the leading section of driver 13 (bottom) to impact one and squeezes into part (omitting diagram).Squeeze into part and impacted by driver 13 and got from the front end (exit wound of bullet) squeezing into portion 3 for one that is supplied in the portion of squeezing into 3 from nail kit 5, and be driven into and squeeze into material W.
The lower dead center of piston 12 is limited by the lower dead center bolster 18 of the bottom being arranged at cylinder body 11, and this lower dead center bolster 18 absorbs the impact moving down end of piston 12.
The midway of cylinder body 11 is provided with check-valves 19 ~ 19.When piston 12 in the midway moved down by this check-valves 19 ~ 19 time, a part for the Compressed Gas on cylinder body in room 23 flow into returning in gas compartment 22 of the outer circumferential side being arranged at cylinder body 11 via this check-valves 19 ~ 19.Flow into the Compressed Gas returned in gas compartment 22 flow into piston 12 below (under cylinder body room 24) via return aperture 22a ~ 22a.
Piston 12 arrive lower dead center and squeeze into part squeeze into end after, when to the button pulling process of switch lever 6, trigger valve 7 disconnects in releasing, as mentioned above, towards supplying compressed gas in room 21 on gas supply road 14 and head valve, head valve 20 is closed, further, on cylinder body, room 23 is communicated with air.Be communicated with air by room on cylinder body 23, piston 12 moves up by the Compressed Gas (returning gas) flow under cylinder body in room 24, and thus, piston 12 turns back to top dead centre.
Herein, to move up at head valve 20 and under the state opened, the sealing protuberance 20b being arranged at its inner circumferential side becomes the state being resisted against the diaphragm seal 15a being arranged on top dead centre bolster 15, and the steam vent 20c ~ 20c being arranged at head valve 20 and the first row air chamber 25 being arranged on its outer circumferential side become by the state hermetic cut off from room on cylinder body 23.On the other hand, as shown in Figure 3, when head valve 20 moves down and closes, its sealing protuberance 20b becomes the state left from the diaphragm seal 15a of top dead centre bolster 15, and on cylinder body, room 23 becomes the state that the steam vent 20c ~ 20c via head valve 20 is communicated with first row air chamber 25.
First row air chamber 25 is via the ft connection of the exhaust channel 16a ~ 16a and top cover 16 that are arranged at top cover 16.At the upper surface of top cover 16, hood 30 is installed.Second row air chamber 26 is provided with between top cover 16 and hood 30.Second row air chamber 26 is communicated with first row air chamber 25 all the time via exhaust channel 16a ~ 16a.Compressed Gas is discharged from trigger valve 7 towards second row air chamber 26 via exhaust channel 27.
Hood 30 possesses cover main body 31 and the sealing 32 of hard resin.Cover main part 31 is in bowl-type, and its center is screwed on the upper surface of top cover 16 by hold-down screw 33.Cover main part 31 via be arranged at top cover 16 upper surface center boss portion 16b and install in rotatable mode.At the surrounding wall portion 31a of cover main body 31, multiple positions of its circumferential direction are provided with exhaust outlet 34 ~ 34.As shown in Figure 2, exhaust outlet 34 ~ 34 is roughly arranged throughout the scope of about 180 ° ~ 200 ° along the surrounding wall portion 31a of cover main body 31.The wave filter 34a of noise elimination is installed at each exhaust outlet 34.By making cover main part 31 rotate centered by boss portion 16b, discharge directions (blow-off direction of the Compressed Gas) change be vented via exhaust outlet 34 ~ 34 can be made.
The hood 30 of present embodiment has feature on the seal construction relative to top cover 16.Front-end edge along the surrounding wall portion 31a of cover main part 31 is provided with sealing 32.Sealing portion 32 for raw material, and is arranged at cover main part 31 by insert part forming with soft resin material.In the present embodiment, adopt elastic resin as the raw material of sealing 32.As shown in Figure 4, sealing 32 has the parts that cross section is the ring-type of U-shaped, and integrated with sealing wall portion 31b with the state of the sealing wall portion 31b of the coated front end face complete cycle throughout surrounding wall portion 31a.
On the other hand, at the upper surface periphery of top cover 16, the circumferential direction complete cycle centered by boss portion 16b is provided with sealing recess 16c.Hood 30 is with the upper surface making sealing 32 state be flexibly embedded in sealing recess 16c be installed on top cover 16.Be raw-material sealing 32 with soft resin to embed along sealing recess 16c.Flexibly be embedded in sealing recess 16c by sealing portion 32, prevent the Leakage Gas between this hood 30 and upper surface of top cover 16, thus, guarantee the high-air-tightness of the second row air chamber 26 beyond exhaust outlet 34 ~ 34.
Especially, the sealing 32 of soft elastic material is pressed against mainly outer circumferential side wall and the bottom surface of sealing recess 16c by the exhaust air pressure produced in second row air chamber 26, thus, reliably prevent the Leakage Gas of the part beyond exhaust outlet 34 ~ 34 of second row air chamber 26, and then, whole exhausts is all discharged via the exhaust outlet 34 of band noise elimination wave filter 34a, thus can realize the mute of this driver 1.
Being provided with at the upper surface of cover main part 31 with elastic resin material is the guard shield 35 of raw material.Utilize this guard shield 35 to absorb impact when this driver 1 falls etc., thus can alleviate or prevent the damage of driver 1.In the present embodiment, this guard shield 35 is identical with sealing 32 take elastic resin as raw material, and same insert part forming is integrated in the upper surface of cover main part 31.
As described above, driver 1 according to the present embodiment, because the Compressed Gas in room on cylinder body 23 can not produce Leakage Gas at second row air chamber 26 but exhaust outlet 34 via hood 30 is discharged, therefore, it is possible to promote the mute of this driver 1.
And, owing to utilizing with soft elastic resin material as raw material and the high sealing 32 of elastic performance, the air-tightness of second row air chamber 26 improves, for cover main part 31, rigidity can be improved for raw material with hard resin material, therefore, it is possible to suppress the distortion that the pressure at expulsion because of second row air chamber 26 causes.Even if also can suppress or eliminate existing Leakage Gas in this.
And, all the time the structure that abuts of elasticity with it in the sealing recess 16c embedding top cover 16 owing to being formed as the high sealing of elasticity 32, therefore, it is possible to give suitable resistance in the direction of rotation of this hood 30, the abnormal rotation position of the discharge directions (skew) of the hood 30 caused because of vibration etc. can be prevented thus, therefore, it is possible to make sealing portion 32 have the positioning function of hood 30 concurrently.
In addition, the upper surface (rear surface) of the hood 30 shown in citing is provided with the guard shield 35 of elastic resin, therefore, it is possible to alleviate or prevent the damage or damage etc. on this driver 1 when this driver 1 drops to ground from hood 30 side and ground.
Various change can be applied to the embodiment be explained above.Such as, for sealing 32, citing shows and arranges sealing wall portion 31b and with the structure of the sealing 32 of the mode insert part forming cross section U-shaped of coated sealing wall portion 31b at the surrounding wall portion 31a of cover main part 31, but also can be formed as the structure arranging sealing by the mode shown in Fig. 5.
The sealing 36 shown in (A) on the top of Fig. 5 is formed as the structure of the front end outer circumferential side insert part forming of the surrounding wall portion 31a along cover main part 31.In this case, because of the exhaust air pressure of second row air chamber 26, as shown in figure open arrow, surrounding wall portion 31a is towards direction (expanding direction) displacement slightly expanded, thus, sealing 36 is elastically stressed the outer circumferential side internal face in the sealing recess 16c being arranged on top cover 16, prevents the Leakage Gas of this second row air chamber 26 thus.
It is the L-shaped ground structure of insert part forming that the sealing 37 shown in middle part (B) of Fig. 5 is formed as the periphery, front end of the surrounding wall portion 31a crossing over cover main part 31 and end face.In this case, because of the exhaust air pressure of second row air chamber 26, as shown in figure open arrow, surrounding wall portion 31a is towards the displacement slightly of expanding direction, thus, sealing 36 is elastically stressed outer circumferential side internal face in the sealing recess 16c of top cover 16 and bottom surface, prevents the Leakage Gas of second row air chamber 26 thus more reliably.
The sealing 38 shown in bottom (C) of Fig. 5 is formed as with in extending out to the structure comparing the above-mentioned sealing 37 more mode insert part forming of the L-shaped of the position of inner circumferential side side.According to sealing portion 38, the inner circumferential side extension 38a of sealing 38 except the displacement in expanding direction, because of the exhaust air pressure of second row air chamber 26 except surrounding wall portion 31a is elastically stressed the bottom surface in sealing recess 16c, all the more reliably prevents the Leakage Gas of second row air chamber 26 thus.

Claims (5)

1. a driver, this driver built with the piston moved back and forth in cylinder body as drive source using Compressed Gas,
The feature of described driver is,
Described driver possesses:
Top cover, this top cover limits the upper room of described cylinder body; And
Hood, this hood is installed along the rear surface of described top cover, and has the exhaust outlet of being discharged towards air by the Compressed Gas in the exhaust chamber be formed at therebetween,
Described hood possesses:
Cover main part, this cover main part has described exhaust outlet; And
Sealing, sealing portion is arranged along the periphery of described cover main part, and is at least connected to described top cover when being vented by the pressure of Compressed Gas and seals airtightly,
Described sealing with the soft material softer than described cover main part for raw material.
2. driver according to claim 1, is characterized in that,
Described driver is formed as following structure: described sealing is connected to described top cover all the time, and plays function as described cover main part relative to the positioning unit of described top cover.
3. driver according to claim 2, is characterized in that,
Described driver is formed as following structure: make the outer peripheral face of described sealing be connected to described top cover and seal.
4. driver according to claim 3, is characterized in that,
Described sealing is engaged with cover main part by insert part forming.
5. driver according to claim 4, is characterized in that,
It is raw-material guard section that the outer surface of described cover main part is provided with the soft material identical with described sealing.
CN201210460349.4A 2011-11-15 2012-11-15 Driver Active CN103101030B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011249559A JP5758273B2 (en) 2011-11-15 2011-11-15 Driving tool
JP2011-249559 2011-11-15

Publications (2)

Publication Number Publication Date
CN103101030A CN103101030A (en) 2013-05-15
CN103101030B true CN103101030B (en) 2016-01-20

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CN (1) CN103101030B (en)
TW (1) TWI584917B (en)

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JP6938256B2 (en) * 2017-07-19 2021-09-22 株式会社マキタ Driving tool

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US5725142A (en) * 1995-09-14 1998-03-10 Hitachi Koki Co., Ltd. Pneumatic fastener driving tool having air exhaust arrangement
CN2261316Y (en) * 1996-08-21 1997-09-03 重庆市沙坪坝区红旗铸造厂 Aerating nail shooter with stored nails
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Publication number Publication date
CN103101030A (en) 2013-05-15
JP5758273B2 (en) 2015-08-05
TWI584917B (en) 2017-06-01
JP2013103309A (en) 2013-05-30
TW201323162A (en) 2013-06-16

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