WO2008029687A1 - Mécanisme d'ouverture / fermeture d'une chambre de combustion d'un refouloir de combustion de gaz - Google Patents

Mécanisme d'ouverture / fermeture d'une chambre de combustion d'un refouloir de combustion de gaz Download PDF

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Publication number
WO2008029687A1
WO2008029687A1 PCT/JP2007/066762 JP2007066762W WO2008029687A1 WO 2008029687 A1 WO2008029687 A1 WO 2008029687A1 JP 2007066762 W JP2007066762 W JP 2007066762W WO 2008029687 A1 WO2008029687 A1 WO 2008029687A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
opening
combustion chamber
gas
driving tool
Prior art date
Application number
PCT/JP2007/066762
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Tanaka
Hajime Takemura
Jyunichi Tamura
Katsuhiko Murayama
Original Assignee
Max Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Max Co., Ltd. filed Critical Max Co., Ltd.
Publication of WO2008029687A1 publication Critical patent/WO2008029687A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure

Definitions

  • the present invention relates to an opening / closing mechanism for opening and closing a fixed combustion chamber in a gas combustion type driving tool that is powered by combustion and drives a fastener such as a nail or a driving screw.
  • a gas combustion type driving tool ignites a mixed gas obtained by stirring and mixing a combustible gas and air with a fan in a combustion chamber, and explosively burns the gas. To drive the striking piston (see Patent Document 1).
  • the combustion chamber has an annular shape disposed between the upper portion of the striking cylinder that slidably accommodates the striking piston and the lower wall of the body housing. Formed by a movable sleeve. By moving the movable sleeve upward until it hits the lower wall, a sealed combustion chamber is formed, and by moving it downward, the upper and lower portions of the combustion chamber are opened to communicate with the atmosphere.
  • the lower end of the movable sleeve is connected to the upper end of the contact arm.
  • the contact arm is slidable up and down along the nail injection nose portion provided below the striking cylinder, and its lower end protrudes from the tip of the nose portion and presses the lower end against the workpiece.
  • the contact arm constitutes a safety device.
  • the tip of the contact arm protrudes downward from the nose part, the trigger lever cannot be pulled, and the contact arm is pushed upward against the workpiece. Then, the movable sleeve is moved upward to form a sealed combustion chamber so that the trigger lever can be pulled.
  • Patent Document 1 JP 2005-22069 A
  • the conventional gas combustion type driving tool has the following problems.
  • One or more embodiments of the present invention provide driving by removing the operative connection between the combustion chamber and the contact arm, fixing the combustion chamber, and opening and closing an opening formed in the combustion chamber.
  • a mechanism for opening and closing a combustion chamber of a gas combustion type driving tool that makes it easy to operate the tool and finely controls the opening and closing of the combustion chamber.
  • the striking piston is provided in the striking cylinder disposed in the tool body so as to be slidable in the vertical direction.
  • a combustion chamber is provided in the upper part of the impact cylinder.
  • a mixed gas of combustible gas and air is ignited by an ignition plug disposed in the cylinder head and burned explosively, and this high gas pressure is applied to the striking piston to make an impact.
  • a fastener is driven out from a nose portion provided at the bottom of the tool body by a driver coupled to the striking piston.
  • the combustion chamber is disposed and fixed on the upper portion of the impact cylinder.
  • An opening for air supply / exhaust is formed in the combustion chamber. The open / close valve that opens and closes the opening is electrically operated.
  • the opening of the combustion chamber is formed on the upper and lower walls of the combustion chamber, and the valve is moved up and down relative to the opening so as to be opened and closed.
  • the opening of the combustion chamber may be opened and closed by electrically operating the valve in the vertical direction.
  • the opening of the combustion chamber is formed on a side wall of the combustion chamber, the valve is disposed so as to be movable up and down along the outside of the side wall, Is the above A valve opening corresponding to the opening of the combustion chamber is formed, and the valve is electrically operated upward and downward to open and close the opening by overlapping the opening of the combustion chamber and the valve opening. Good.
  • the opening of the combustion chamber is formed in the upper and lower walls of the combustion chamber, the valve is provided rotatably around the center of the combustion chamber, and the valve A valve opening corresponding to the opening of the combustion chamber is formed in the chamber, and the valve is electrically rotated to open and close the opening by the overlapping state of the opening of the combustion chamber and the valve opening. Also good.
  • the combustion chamber is disposed and fixed on the upper portion of the impact cylinder, and an opening for supplying and exhausting the combustion chamber is formed, and an open / close valve that opens and closes the opening is electrically connected. Since the contact arm can be operated as required by the safety device, the stroke can be shortened as long as it is necessary for the safety device, which makes the operation of the driving tool very easy.
  • combustion chamber can be opened and closed independently of the operation of the contact arm, the driving operation can be performed efficiently.
  • combustion chamber is electrically opened and closed by a valve, no labor is required and the force is accurate.
  • the valve since the valve only needs to be moved up and down with respect to the opening of the combustion chamber, the space of the valve can be reduced.
  • the opening of the combustion chamber is formed on the upper and lower walls, and the exhaust and intake are separated from each other.
  • the opening of the combustion chamber is formed in the upper and lower walls, and the exhaust and intake air are separated from each other, and the opening can be made large.
  • FIG. 1 is a longitudinal sectional view of a gas-fired nail driver according to a first exemplary embodiment.
  • FIG. 2 A longitudinal sectional view of the main part showing a state in which the opening of the combustion chamber is opened.
  • FIG. 3 is a longitudinal sectional view showing a combustion chamber opening / closing mechanism of a gas combustion type driving tool according to a second exemplary embodiment.
  • FIG. 6 is a longitudinal sectional view showing the operation mode of the opening / closing mechanism.
  • FIG. 7 is a longitudinal sectional view of a main part showing an opening / closing mechanism of a gas combustion type driving tool according to a third typical embodiment.
  • FIG. 9 is a cross-sectional view showing the operation mode of the opening / closing mechanism.
  • Fig. 1,! / Indicates the tool body of the gas combustion type driving tool (nailing machine).
  • the tool body 1 is provided with a grip 2 and a magazine 3, and a striking piston-cylinder mechanism is provided inside. Below the tool body 1, there is provided a nose portion 4 for punching fasteners.
  • the striking piston / cylinder mechanism is configured such that a striking piston 6 is slidably accommodated in a striking cylinder 5 and a driver 7 is integrally coupled to the bottom of the striking piston 6.
  • the cylinder head 8 is provided with an injection nozzle 12 communicating with the gas container 11, and an ignition plug 13 for igniting and burning the mixed gas. Further, on the upper part of the tool body 1, a combustible gas injected into the combustion chamber 10 is agitated with the air in the combustion chamber 10 to generate a mixed gas having a predetermined air-fuel ratio in the combustion chamber 10.
  • a rotating fan 14 is provided. 15 is a fan motor.
  • openings 16a and 16b are formed in the upper and lower walls of the combustion chamber 10, respectively.
  • the upper opening 16a and the lower opening 16b are formed at corresponding positions on the upper and lower walls, respectively.
  • an upper valve 17 and a lower valve 18 are arranged to be movable up and down at the upper part of the upper opening 16a and the lower part of the lower opening 16b, respectively.
  • Guide rods 20 are formed below the upper valve 17 and above the lower valve 18, and these guide rods 20 are configured to be guided in the vertical direction by a guide portion 21 inside the combustion chamber 10.
  • O-rings 22 are arranged on the lower and upper surfaces of the upper and lower valves 17 and 18, respectively.
  • a compression spring 23 is disposed between the interior 21 and the upper and lower valves 17 and 18, and the upper and lower valves 17 and 18 are separated from the corresponding upper and lower openings 16 a and 16 b by the spring force of the compression spring 23. It is energized to do.
  • an upper cam 24 and a lower cam 25 are rotatably disposed at the upper part of the upper valve 17 and the lower part of the lower valve 18.
  • the upper and lower cams 24 and 25 are formed in a substantially elliptical shape, and a rotating shaft 26 is provided at an eccentric position thereof. These rotating shafts 26 are operatively connected to the electric rotary motor 100 and simultaneously rotate in the opposite direction by the same amount. It is configured as follows.
  • the combustion chamber 10 is disposed and fixed on the upper portion of the impact cylinder 5, and the combustion chamber 10 is provided with openings 16a and 16b for supply and exhaust, and the openings 16a and 16b are formed. Since the opening and closing valves (upper and lower valves 17 and 18) that are opened and closed are electrically operated, the combustion chamber 10 can be opened and closed independently of the operation of the contact arm constituting the safety device. Therefore, if the contact arm load is only as much as necessary as a safety device, the stroke can be shortened and the operation of the driving tool becomes very easy.
  • FIG. 3 to 6 show the combustion chamber opening / closing mechanism for the combustion chamber 10 of the gas combustion type driving tool according to the second exemplary embodiment.
  • the basic structure of the nailing machine is the same as that of the first exemplary embodiment. It is.
  • a plurality of openings 16 a and 16 b are formed in the side wall 10 c of the combustion chamber 10.
  • the same number of openings 16a and 16b are formed in the upper and lower portions of the side wall.
  • An O-ring 22 is provided at the periphery of the openings 16a and 16b.
  • the side valve 28 is disposed along the outside of the side wall 10c so as to be operable only in the vertical direction.
  • the side valve 28 is formed in a cylindrical shape, and as shown in FIG.
  • the lower surface of the plate is formed so as to be gently inclined so that one side 30 is high and the opposite side 31 is gradually lower (projects downward).
  • the side valve 28 is formed with valve openings 32 and 33 corresponding to the openings 16a and 16b of the combustion chamber 10, respectively. These valve opening portions 32 and 33 are formed at the upper and lower portions of the side valve 28, and are formed in the same size as the openings 16 a and 16 b of the combustion chamber 10.
  • a spring 29 is disposed on the upper side of the side valve 28. The spring 29 constantly moves the side valve 28 downward so that the valve openings 32 and 33 are aligned with the openings 16a and 16b of the combustion chamber 10. Overlapping and biased to open the valve opening 32, the valve opens.
  • the side valve 28 is configured to electrically operate in the vertical direction.
  • the cam gear 34 is disposed below the side valve 28.
  • This cam gear 3 4 is a circular cam that is inclined at the top of a ring-shaped gear 35 with teeth on the outer periphery so that one side 36 is low and the other side 37 is gradually higher as shown in FIG.
  • a portion 38 is formed and is rotatably arranged around the upper part of the hitting cylinder 5.
  • the inner diameter of the cam portion 38 is the same as the inner diameter of the side valve 28, and the inclined lower surface of the side valve 28 can be engaged with the inclined upper surface of the cam portion 38.
  • An electric rotary motor 41 is disposed on the side of the side valve 28, and the gear is meshed with a reduction gear 40 fixed to the output shaft of the motor 41.
  • the electric rotary motor 41 is actuated to rotate the cam gear 34, the engagement state between the upper surface of the cam gear 34 and the lower surface of the side valve 28 changes, so that the side valve 28 moves up and down as shown in FIG.
  • the highest portion 37 and the lowest portion 36 of the cam gear 34 are engaged with the highest portion 30 and the lowest portion 31 of the side valve 28.
  • the side valve 28 is set to be the lowest as a whole.
  • the openings 16a and 16b of the combustion chamber 10 overlap with the openings 16a and 16b of the side valve 28 in an aligned state to be in an open state.
  • the combustion chamber 10 is disposed and fixed on the upper portion of the impact cylinder 5, and the supply and exhaust openings 16a and 16b are formed in the combustion chamber 10, and the openings 16a and 16b are formed. Since the opening / closing valve (side valve 28) to be opened / closed is electrically operated, the combustion chamber 10 can be opened / closed independently of the operation of the contact arm. Therefore, the stroke of the contact arm can be shortened if the load of the contact arm is as much as necessary for the safety device, so that the operation of the driving tool becomes very easy.
  • combustion chamber 10 can be opened and closed independently of the operation of the contact arm, the efficiency can be improved! And the driving operation can be performed.
  • cam portion and the side valve of the embodiment have inclined surfaces every 180 degrees, a force S rotating 180 degrees and an inclined surface every 90 degrees are provided and rotated 90 degrees.
  • Side valve up It may be configured to move downward. In this case, the high part of the cam part and the low part of the side valve are supported in two places, so it is stable.
  • FIG. 7 to 9 show a combustion chamber opening / closing mechanism with respect to the combustion chamber 10 of the gas combustion type driving tool according to the third typical embodiment.
  • the basic structure of the nailing machine of the third exemplary embodiment is the same as that of the first exemplary embodiment.
  • the upper and lower walls of the combustion chamber 10 are formed with individual openings 16a and 16b.
  • an upper shutter valve 42 and a lower shirt valve 43 are disposed around the center of the combustion chamber 10 along the outside of the upper and lower walls, respectively.
  • the upper and lower shutter valves 42 and 43 are both formed in a donut plate.
  • the central hole of the upper shutter valve 42 engages with the circular support edge 44 at the upper part of the combustion chamber 10, and the central hole of the lower shutter valve 43 is blown. It is engaged with the outer peripheral surface of the cylinder 5 and supported by the annular projecting edge 45.
  • valve openings 32 and 33 having substantially the same shape and the same size as the openings 16a and 16b are formed on opposite sides. When the shutter valves 42 and 43 are rotated 90 degrees, the valve openings 32 and 33 are aligned with the openings 16a and 16b of the combustion chamber 10 so that they overlap or do not overlap at all! /!
  • the upper and lower shutter valves 42, 43 are configured to rotate electrically.
  • an arcuate swivel gear 46 is formed in about a quarter of the outer peripheral edges of the upper and lower shutter valves 42 and 43.
  • a motor 41 is disposed on the side of the combustion chamber 10, and the swivel gear 46 is meshed with a reduction gear 40 fixed to the output shaft at the upper and lower portions of the electric rotary motor 41.
  • the upper and lower shutter valves 42, 43 When rotating in one direction, the upper and lower shutter valves 42, 43 simultaneously close the upper and lower openings 16a, 16b of the combustion chamber 10, and when rotating in the other direction, the shutter valve valve openings 32, 33 However, the upper and lower openings 16a and 16b of the combustion chamber 10 are set so as to overlap with each other in an aligned state and rotate so as to open the combustion chamber 10.
  • an electric rotary motor When 41 is operated and rotated in one direction, the shutter valves 42 and 43 are also rotated to close the openings 16a and 16b of the combustion chamber 10 and seal the combustion chamber 10.
  • the combustible gas is injected from the injection nozzle 12 into the sealed combustion chamber 10 and the rotary fan 14 rotates to stir and mix the combustible gas and air
  • the trigger is pulled and the spark plug 13 ignites. Burn explosively.
  • the internal pressure in the combustion chamber 10 suddenly increases, so that a high gas pressure is supplied into the striking cylinder 5, the striking piston 6 is driven, and the driver 7 coupled to the lower surface side of the striking piston 6.
  • the nail is driven out from the nose 4 (see FIG. 1) provided at the lower part of the tool body 1.
  • the combustion chamber 10 is disposed and fixed on the upper portion of the impact cylinder 5, and the supply and exhaust openings 16a and 16b are formed in the combustion chamber 10, and the openings 16a and 16b are formed. Since the opening / closing valve (shutter valve) that opens and closes is electrically operated, the combustion chamber 10 can be opened and closed independently of the operation of the contact arm. Therefore, if the contact arm load is as much as necessary for the safety device, the stroke can be shortened, and the operation of the driving tool becomes very easy.
  • the opening and closing of the combustion chamber 10 is electrically performed by a valve, it does not require labor, and is accurate and can be finely controlled to achieve the best combustion efficiency.
  • a force that uses an electric rotary motor as an actuator for electrically operating the opening / closing valve is an electric rotary motor.
  • This electric motor is an electric rotary motor.
  • an electromagnetic solenoid or piezoelectric element Even when used as an eta, the open / close valve can be electrically operated.
  • the present invention is applicable to a gas combustion type driving tool that is powered by combustion and drives a fastener such as a nail or a driving screw.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

L'invention concerne un cylindre de martelage (5) placé dans le corps d'outil (1) qui est muni d'un piston percuteur (6) coulissant en direction verticale. Une chambre de combustion (10) est placée au dessus du cylindre de martelage (5). Un mélange de gaz composé de gaz inflammable et d'air est allumé par une bougie d'allumage (13) et brûlé avec détonation dans la chambre de combustion (10), et le piston percuteur (6) est actionné par impulsion en y faisant agir du gaz haute pression et ensuite une pièce de fixation est actionnée à partir d'une partie nez (4) placée au niveau d'une partie inférieure d'un corps d'outil (1) à l'aide d'un organe d'entraînement (7) couplé au côté de la surface inférieure du piston percuteur (6). La chambre de combustion (10) est fermement fixée sur une partie supérieure du cylindre de martelage (5). Des ouvertures d'admission et d'échappement (16a, 16b) sont formées dans la chambre de combustion (10). Une soupape permettant d'ouvrir / fermer les ouvertures (16a, 16b) est opérée électriquement.
PCT/JP2007/066762 2006-09-07 2007-08-29 Mécanisme d'ouverture / fermeture d'une chambre de combustion d'un refouloir de combustion de gaz WO2008029687A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006242891A JP5011900B2 (ja) 2006-09-07 2006-09-07 ガス燃焼式打込み工具の燃焼室の開閉機構
JP2006-242891 2006-09-07

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WO2008029687A1 true WO2008029687A1 (fr) 2008-03-13

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WO (1) WO2008029687A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105682861A (zh) * 2013-07-16 2016-06-15 喜利得股份公司 控制方法和手持工具机
EP3184248A1 (fr) * 2015-12-22 2017-06-28 HILTI Aktiengesellschaft Outil de scellement a moteur thermique et procede de fonctionnement d'un outil de scellement
US10898996B2 (en) 2015-12-22 2021-01-26 Hilti Aktiengesellschaft Combustion-powered placing tool and method for operating such a placing tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741183A (en) * 1980-08-26 1982-03-08 Max Co Ltd Impact tool
JPS63207569A (ja) * 1987-02-20 1988-08-26 日立工機株式会社 内燃式ピストン駆動装置
JP2004034288A (ja) * 2002-07-16 2004-02-05 Hilti Ag 燃焼力作動型打ち込み装置
JP2004116404A (ja) * 2002-09-26 2004-04-15 Toyota Motor Corp 可変動弁機構の制御装置
JP2004245120A (ja) * 2003-02-13 2004-09-02 Toyota Motor Corp 内燃機関の始動制御システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741183A (en) * 1980-08-26 1982-03-08 Max Co Ltd Impact tool
JPS63207569A (ja) * 1987-02-20 1988-08-26 日立工機株式会社 内燃式ピストン駆動装置
JP2004034288A (ja) * 2002-07-16 2004-02-05 Hilti Ag 燃焼力作動型打ち込み装置
JP2004116404A (ja) * 2002-09-26 2004-04-15 Toyota Motor Corp 可変動弁機構の制御装置
JP2004245120A (ja) * 2003-02-13 2004-09-02 Toyota Motor Corp 内燃機関の始動制御システム

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105682861A (zh) * 2013-07-16 2016-06-15 喜利得股份公司 控制方法和手持工具机
TWI610770B (zh) * 2013-07-16 2018-01-11 希爾悌股份有限公司 控制方法與手工具機（三）
US10058985B2 (en) 2013-07-16 2018-08-28 Hilti Aktiengesellschaft Control method for hand-held machine tool
EP3184248A1 (fr) * 2015-12-22 2017-06-28 HILTI Aktiengesellschaft Outil de scellement a moteur thermique et procede de fonctionnement d'un outil de scellement
WO2017108751A1 (fr) * 2015-12-22 2017-06-29 Hilti Aktiengesellschaft Appareil de pose à commande par un moteur à combustion interne et procédé de fonctionnment d'un tel appareil de pose
US10898996B2 (en) 2015-12-22 2021-01-26 Hilti Aktiengesellschaft Combustion-powered placing tool and method for operating such a placing tool
US10926388B2 (en) 2015-12-22 2021-02-23 Hilti Aktiengesellschaft Fuel-powered setting device and method for operating such a setting device

Also Published As

Publication number Publication date
JP2008062339A (ja) 2008-03-21
JP5011900B2 (ja) 2012-08-29

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