JPS6374579A - Gas mixer for internal combustion type piston drive tool - Google Patents
Gas mixer for internal combustion type piston drive toolInfo
- Publication number
- JPS6374579A JPS6374579A JP61216178A JP21617886A JPS6374579A JP S6374579 A JPS6374579 A JP S6374579A JP 61216178 A JP61216178 A JP 61216178A JP 21617886 A JP21617886 A JP 21617886A JP S6374579 A JPS6374579 A JP S6374579A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- housing
- combustion chamber
- internal combustion
- combustion type
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 34
- 239000002737 fuel gas Substances 0.000 claims description 13
- 239000000446 fuel Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000001273 butane Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は燃料ガスを瞬間的に燃焼させ、需圧を発生しピ
ストンを駆動する工具の燃料ガスと空気を混合−１辷る
装置に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a device for mixing fuel gas and air for a tool that instantaneously burns fuel gas to generate demand pressure and drive a piston. be.
従来、釘打機やタッカ等の工具は一般に高圧空気を利用
して作業が行なわれている。しかしこれらの工具はコン
プレッサを用い、工具とコンプレッサの間をホースでつ
ないで操作するため、建築現場等で移動しながら作業す
る時等、ホースが邪魔になり作業性の点で難点があった
。Conventionally, tools such as nailers and tackers generally use high-pressure air to perform work. However, since these tools use a compressor and are operated by connecting a hose between the tool and the compressor, the hose gets in the way when working while moving at a construction site, etc., making it difficult to work.
そこでコンプレッサやホースを用いない工具としてプロ
パンやブタンなどの燃料ガスを瞬間的に燃焼させ、高圧
を発生し、ピストンを駆動する工具を考案し作製したと
ころ、圧力の発生のしかたは燃料ガスと空気の混合の程
度によりて変化し、安定した駆動力が得られ々かった。Therefore, we devised and created a tool that instantly burns fuel gas such as propane or butane to generate high pressure and drive a piston without using a compressor or hose. The driving force varies depending on the degree of mixing, making it difficult to obtain a stable driving force.
例えば釘打機に応用した場合、釘の打込力が安定せず、
釘を打込み過ぎたシ、釘の頭が木材から出るという問題
点があった。For example, when applied to a nail gun, the nail driving force is unstable,
There was a problem with driving the nails in too far and the heads of the nails coming out of the wood.
本発明の目的は、上記したピストンの駆動力の不安定さ
をなくすとともに、高価なコンプレッサを使わなくても
従来と同様の作業をできるようにすることである。An object of the present invention is to eliminate the above-mentioned instability of the driving force of the piston, and to enable the same work as before without using an expensive compressor.
本発明は、内燃式ピストン駆動工具の駆動力が、燃料ガ
スと空気の混合気を均一にすることによシ安定すること
に着目し、燃料ガスの噴射口を燃焼室各所に設け、短時
間に燃料ガスと空気が混合するように、噴射口と燃焼室
の関係を工夫したものである。The present invention focuses on the fact that the driving force of an internal combustion type piston-driven tool is stabilized by making the mixture of fuel gas and air uniform. The relationship between the injection port and the combustion chamber has been devised so that the fuel gas and air can be mixed.
本発明に係る内燃式ピストン駆動工具のガス混合装置の
一実施例を例えば釘打機の図面を用いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas mixing device for an internal combustion type piston-driven tool according to the present invention will be described using a drawing of, for example, a nail gun.
第１図において、１は端部に開口部１ａ？有するハウジ
ング、２はハウジング１の開口部ｌａ側に固定しｆｃ−
ｙリング、３はシリンダ２内部をしゆう動可能なピスト
ン、４はシリンダ２の７・シリンダ１の反対側に固定し
たガイドである。ガイド４の内部はピストン３に固着し
たロッド６が釘５を打つようにしゆう動し、かつガイド
４の側部には釘５をガイド内部に挿入する釘送夛部７を
装着する。In FIG. 1, 1 has an opening 1a at the end. The housing 2 is fixed to the opening la side of the housing 1, and the fc-
Y-ring, 3 is a piston that can move inside the cylinder 2, 4 is a guide fixed to the opposite side of the cylinder 2 and the cylinder 1. Inside the guide 4, a rod 6 fixed to a piston 3 moves to drive a nail 5, and a nail feeding part 7 for inserting the nail 5 into the guide is attached to the side of the guide 4.
ハウジング１には、プロパンやブタン等の燃料ガスを一
定量注入する燃料注入器８、空気を注入する空気注入器
９、空気注入器９と同期して開閉するパルプ１０、圧電
素子等を利用したスノく−ク電圧発生器１１、スパーク
電圧発生器１１で発生した高電圧によシ火花を発生し燃
料混合気を着火する点火プラグ１２、燃料混合気が通過
し着火後の火災が伝播する空間１３がほぼ全面に散在す
る格子１４ａ〜１４ｄ、格子１４ａ〜１４ｄを貫通し各
格子間に燃料ガスを噴出する噴射口１５２１〜１５ｄを
設は噴射口１５ａ〜１５ｄと燃料注入器８を連通ずるガ
ス通路工６を設けたノズル１７を有する。The housing 1 uses a fuel injector 8 for injecting a fixed amount of fuel gas such as propane or butane, an air injector 9 for injecting air, a pulp 10 that opens and closes in synchronization with the air injector 9, a piezoelectric element, etc. A snoke voltage generator 11, a spark plug 12 that generates a spark using the high voltage generated by the spark voltage generator 11 and ignites the fuel mixture, and a space through which the fuel mixture passes and the fire propagates after ignition. 13 are scattered over almost the entire surface, and injection ports 1521 to 15d that penetrate through the grids 14a to 14d and eject fuel gas between each grid are installed. It has a nozzle 17 provided with a passageway 6.
ピストン３のシリンダ２とのしゆう動部分には０リング
１８を装着し気密を保ち、ノ１ウジング１とシリンダ２
とピストン３で閉鎖された空間が燃焼室１９を形成し、
燃焼室１９は格子１４ａ〜１４ｄにより１９ａ〜１９ｅ
に区切られる。An O-ring 18 is attached to the moving part of the piston 3 with the cylinder 2 to maintain airtightness.
The space closed by the piston 3 forms a combustion chamber 19,
The combustion chamber 19 is divided into 19a to 19e by gratings 14a to 14d.
divided into.
点火プラグ１２はハウジング１の閉鎖している端面側に
アシ点火プラグ１２とノ・シリンダ１の開口部１ａの間
に格子１４ａ〜１４ｄを設ける。ハウジング開口部１ａ
の大きさはピストン３の直径よシ小さくピストン３がシ
リンダ２からハウジング１に移動するのを阻止する。格
子１４ａ〜１４ｄは平板の全面に数多くの穴を明けたも
の、又は線材によシ網目を形成したもの等で何れも格子
の全面に空間１３と棧２０が散在するものである。The spark plug 12 is provided with gratings 14a to 14d between the recessed spark plug 12 and the opening 1a of the cylinder 1 on the closed end side of the housing 1. Housing opening 1a
is smaller than the diameter of the piston 3 and prevents the piston 3 from moving from the cylinder 2 to the housing 1. The lattices 14a to 14d are flat plates with many holes drilled on the entire surface, or wire meshes formed with wire rods, and each of them has spaces 13 and lattices 20 scattered over the entire surface of the lattice.
シリンダ２のピストンしゆう動部２ａにおいて、２１は
ピストン停止部でハウジング１側の端部にあ夛他のピス
トンしゆう動部２ａよシ径がいくぶん犬キ＜、ピストン
３がハウジング１側に移動すると０リング１８がピスト
ン停止部２１に移動し０リング１８の弾性力によシピス
トン３をノ）シリンダ１側に停止させる。In the piston sliding part 2a of the cylinder 2, 21 is a piston stop part located at the end on the housing 1 side. When it moves, the O-ring 18 moves to the piston stop portion 21, and the elastic force of the O-ring 18 causes the piston 3 to stop on the cylinder 1 side.
シリンダ２０ガイド４側に弾性体２２を装着する。また
シリンダ２には、ピストン３が移動し弾性体２２に接触
する時ハウジング１とシリンダ２とピストン３でｌｆｆ
１すれた空間と外気を通じる吸排気口２３を有する。An elastic body 22 is attached to the cylinder 20 guide 4 side. Also, in the cylinder 2, when the piston 3 moves and contacts the elastic body 22, the housing 1, the cylinder 2, and the piston 3 have lff.
1 has an intake/exhaust port 23 that communicates with the outside air.
次にこの釘打機の操作について説明すると、始めにピス
トン３は第１図のよりにピストン停止部２１に停止して
いる。そこで空気注入器９よシ空気を注入しパルプ１０
を開いて燃焼室１９内の空気を排出し燃焼室１９内を新
鮮な空気で充満し、その後空気注入器９とパルプ１０を
閉鎖する。次に燃料注入器８よシ一定量の燃料ガスを注
入すると、各噴射口１５ａ〜１５ｄよシ燃料ガスが噴射
され周囲の空気と混合することによシ、短時間に燃焼室
１９全体をほぼ一様の燃料混合気で充満する。この状態
でスパーク電圧発生器工１を動作させ点火プラグ１２で
燃料混合気に着火する。燃焼室１９ａ内での燃焼によシ
燃焼ガスは膨張し、まだ燃焼していない未燃焼ガスが押
されて各格子１４ａ〜１４ｄの空間１３を通って、燃焼
室１９ａの未燃焼ガスは燃焼室１９ｂＫ流入し、燃焼室
１９ｂの未燃焼ガスは燃焼室１９ｃに流入し未燃焼ガス
は次々にピストン３の方向に流れる。この時空間１３を
通過した未燃焼ガスは、棧２０が流れに対し障害物とな
シ棧２０の下流に渦を発生し乱流となる。燃焼室１９ａ
における火炎は層流予混合火炎で燃焼速度が遅いが、火
炎が伝播し格子１４ａの空間１３を通過すると乱流によ
り燃焼室１９ｂにおける火炎は乱流予混合火炎となシで
燃焼速度が速くなる。燃焼速度の増加によシ燃焼ガスの
膨張速度が上昇し、燃焼室１９ｂから燃焼室１９ｃに流
入する未燃焼ガスの流速が上昇すること罠より、格子１
４ｂの障害物である棧２０の下流に発生する渦が更に強
くなシ強い乱流と彦る。Next, the operation of this nail gun will be explained. First, the piston 3 is stopped at the piston stop 21 as shown in FIG. Then, inject air using air injector 9 and pulp 10
is opened to exhaust the air in the combustion chamber 19 and fill the combustion chamber 19 with fresh air, and then the air injector 9 and pulp 10 are closed. Next, when a certain amount of fuel gas is injected through the fuel injector 8, the fuel gas is injected through each injection port 15a to 15d and mixes with the surrounding air, filling almost the entire combustion chamber 19 in a short time. Fill with a uniform fuel mixture. In this state, the spark voltage generator 1 is operated to ignite the fuel mixture with the ignition plug 12. The combustion gas expands due to combustion within the combustion chamber 19a, and the unburned gas that has not yet been combusted is pushed through the spaces 13 of each grid 14a to 14d, and the unburned gas in the combustion chamber 19a flows into the combustion chamber. 19bK flows in, the unburned gas in the combustion chamber 19b flows into the combustion chamber 19c, and the unburned gas flows in the direction of the piston 3 one after another. The unburned gas that has passed through this space-time 13 generates a vortex downstream of the ridge 20 as the ridge 20 becomes an obstacle to the flow, resulting in a turbulent flow. Combustion chamber 19a
The flame in the combustion chamber 19b is a laminar premixed flame and has a slow combustion speed, but when the flame propagates and passes through the space 13 of the grid 14a, the flame in the combustion chamber 19b becomes a turbulent premixed flame and the combustion speed increases due to turbulence. . Due to the increase in the combustion rate, the expansion rate of the combustion gas increases, and the flow rate of the unburned gas flowing from the combustion chamber 19b to the combustion chamber 19c increases.
The vortices generated downstream of the ridge 20, which is an obstacle to the 4b, become even stronger, resulting in a strong turbulent flow.
この強い乱流により火炎が燃焼室１９ｃに伝播すると燃
焼速度が更に速くなる。このように火炎が格子を通過す
る度に加速度的に燃焼速度が上昇し、燃焼速度の上昇に
より燃焼ガスの膨張速度が上昇し、ハウジング内部の圧
力が上昇し、高圧となる。When the flame propagates into the combustion chamber 19c due to this strong turbulence, the combustion speed becomes even faster. In this way, each time the flame passes through the grid, the combustion speed increases at an accelerated rate, and the increase in combustion speed increases the expansion speed of the combustion gas, causing the pressure inside the housing to rise and become high pressure.
この高圧によシピストン３は０リング１８の弾性力に抗
してピストン停止部２１からガイド４の方向に押し出さ
れ駆動行程に入り、木材等の被加工物に釘５を打ち込む
。Due to this high pressure, the piston 3 is pushed out from the piston stop portion 21 toward the guide 4 against the elastic force of the O-ring 18, enters a driving stroke, and drives the nail 5 into a workpiece such as wood.
ピストンが駆動されガイド４＃ｌに移動すると、ピスト
ン３とシリンダ２とガイド４と弾性体２２で囲まれた圧
縮室２４の空気は吸排気口２３から大気に排出される。When the piston is driven and moves to the guide 4 #l, the air in the compression chamber 24 surrounded by the piston 3, cylinder 2, guide 4, and elastic body 22 is discharged to the atmosphere from the intake/exhaust port 23.
ピストン３が吸排気口２３を通過すると、ピストン３は
弾性体２２に衝突し燃焼室１９の高温高圧ガスは吸排気
口２３から大気中に排気され、ピストン３は圧縮室２４
の空気を圧縮する。その後燃焼室１９内の温度は急速に
低下し燃焼室１９は真空になシ、ピストン３が弾性体２
２０弾性力と圧縮室２４の圧縮力によシ押し上げら、れ
吸排気口２３よシハクジング１側に移動すると、ピスト
ン３のハウジング１側は真空でピストン３のガイド４側
は大気圧なので、その差圧によシピストン３はピストン
停止部２１まで戻シハウジング開口部１ａに接触して停
止しＯリング１８の弾性力によシ保持され初期状態に戻
る。When the piston 3 passes through the intake/exhaust port 23 , the piston 3 collides with the elastic body 22 , and the high-temperature, high-pressure gas in the combustion chamber 19 is exhausted from the intake/exhaust port 23 into the atmosphere.
compress the air. After that, the temperature inside the combustion chamber 19 rapidly decreases, the combustion chamber 19 becomes vacuum, and the piston 3 moves to the elastic body 2.
20 is pushed up by the elastic force and the compression force of the compression chamber 24, and when it moves from the intake/exhaust port 23 to the housing 1 side, the housing 1 side of the piston 3 is in vacuum and the guide 4 side of the piston 3 is at atmospheric pressure, so the Due to the differential pressure, the piston 3 returns to the piston stop portion 21, contacts the housing opening 1a and stops, and is held by the elastic force of the O-ring 18 and returns to the initial state.
本発明の変形例を第２図に示す。図において燃料注入器
８と噴射口１５は１対１で対応しておシ、これによシ、
各噴射口１５から確実に一定量の燃料ガスが噴射され、
燃焼室１９の全領域がほぼ均一の燃料混合気で充満する
ことができる。A modification of the invention is shown in FIG. In the figure, the fuel injector 8 and the injection port 15 are in one-to-one correspondence.
A certain amount of fuel gas is reliably injected from each injection port 15,
The entire area of the combustion chamber 19 can be filled with a substantially homogeneous fuel mixture.
本発明によれば、燃料ガスと空気を短時間にほぼ均一に
混合するようにしたので、安定したピストン駆動力の得
られる内燃式ピストン駆動工具とすることができ、高価
なコンプレッサなど他の動力源を必要とせず、ホースや
コードがいらず携帯性が良くなシ、安価なピストン駆動
工具を提供するととができる。According to the present invention, since fuel gas and air are almost uniformly mixed in a short time, it is possible to create an internal combustion type piston-driven tool that provides stable piston driving force, and it is possible to use other power sources such as an expensive compressor. It is possible to provide an inexpensive piston-driven tool that does not require a power source, hoses or cords, and is highly portable.
第１図は本発明になる内燃式ピストン頃動装置の一実施
例を示す釘打機の縦断側面図、第２図は本発明の変形例
を示す釘打機の縦断側面図である。
図において、１はハウジング、１ａは開口部、２はシリ
ンダ、３はピストン、８は燃料注入器、９は空気注入器
、１０はパルプ、１２は点火プレグ、１５は噴射口であ
る。
特許出願人の名称 日立工機株式会社オ１図FIG. 1 is a longitudinal sectional side view of a nailing machine showing an embodiment of the internal combustion type piston rotation device according to the present invention, and FIG. 2 is a longitudinal sectional side view of the nailing machine showing a modification of the invention. In the figure, 1 is a housing, 1a is an opening, 2 is a cylinder, 3 is a piston, 8 is a fuel injector, 9 is an air injector, 10 is pulp, 12 is an ignition preg, and 15 is an injection port. Name of patent applicant Hitachi Koki Co., Ltd. Figure 1
Claims (1)
口部に隣接するシリンダ内を摺動するピストンと、前記
ハウジング内に燃料ガスを注入する燃料注入器と、前記
ハウジング内の空気を入れ替える手段と、前記ハウジン
グ内の点火装置を有し、前記燃料注入器と連通して前記
ハウジング内に燃料ガスを噴出する噴射口を２個以上設
けたことを特徴とする内燃式ピストン駆動工具のガス混
合装置。a housing having an opening at one end; a piston sliding within a cylinder adjacent to the opening of the housing; a fuel injector for injecting fuel gas into the housing; and means for exchanging air within the housing; A gas mixing device for an internal combustion type piston-driven tool, comprising an ignition device in the housing, and two or more injection ports communicating with the fuel injector and ejecting fuel gas into the housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61216178A JPS6374579A (en) | 1986-09-12 | 1986-09-12 | Gas mixer for internal combustion type piston drive tool |
| US07/041,379 US4773581A (en) | 1986-06-13 | 1987-04-23 | Combustion gas powered tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61216178A JPS6374579A (en) | 1986-09-12 | 1986-09-12 | Gas mixer for internal combustion type piston drive tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6374579A true JPS6374579A (en) | 1988-04-05 |
| JPH0555278B2 JPH0555278B2 (en) | 1993-08-16 |
Family
ID=16684508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61216178A Granted JPS6374579A (en) | 1986-06-13 | 1986-09-12 | Gas mixer for internal combustion type piston drive tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6374579A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001157970A (en) * | 1999-10-19 | 2001-06-12 | Hilti Ag | Piston driving method for transportable combustibility actuation device, and transportable combustibility actuation device |
| EP1484138A2 (en) * | 2003-06-02 | 2004-12-08 | Makita Corporation | Combustion power tool |
| JP2006152024A (en) * | 2004-11-25 | 2006-06-15 | Hitachi Koki Co Ltd | Fuel gas, combustion type power tool driven by the same fuel gas and gas cylinder for combustion type power tool |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748354A (en) * | 1980-09-03 | 1982-03-19 | Shin Nippon Pipe Kk | Moving type injection coating method and its apparatus |
-
1986
- 1986-09-12 JP JP61216178A patent/JPS6374579A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5748354A (en) * | 1980-09-03 | 1982-03-19 | Shin Nippon Pipe Kk | Moving type injection coating method and its apparatus |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001157970A (en) * | 1999-10-19 | 2001-06-12 | Hilti Ag | Piston driving method for transportable combustibility actuation device, and transportable combustibility actuation device |
| EP1484138A2 (en) * | 2003-06-02 | 2004-12-08 | Makita Corporation | Combustion power tool |
| EP1484138A3 (en) * | 2003-06-02 | 2006-10-25 | Makita Corporation | Combustion power tool |
| US7243829B2 (en) | 2003-06-02 | 2007-07-17 | Makita Corporation | Combustion power tool |
| JP2006152024A (en) * | 2004-11-25 | 2006-06-15 | Hitachi Koki Co Ltd | Fuel gas, combustion type power tool driven by the same fuel gas and gas cylinder for combustion type power tool |
| JP4492310B2 (en) * | 2004-11-25 | 2010-06-30 | 日立工機株式会社 | Fuel gas, combustion power tool driven by the fuel gas, and gas cylinder for combustion power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0555278B2 (en) | 1993-08-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |