JP4481471B2

JP4481471B2 - Intake duct structure of soundproof structure casing

Info

Publication number: JP4481471B2
Application number: JP2000309129A
Authority: JP
Inventors: 三雄永田; 清見小林
Original assignee: Nippon Sharyo Ltd
Current assignee: Nippon Sharyo Ltd
Priority date: 2000-10-10
Filing date: 2000-10-10
Publication date: 2010-06-16
Anticipated expiration: 2020-10-10
Also published as: JP2002115561A

Description

【０００１】
【発明の属する技術分野】
本発明は、内部に、エンジンと、該エンジンにより駆動される発電機、コンプレッサ、油圧ポンプ等の動力供給源を収納したエンジン作業機の防音構造ケーシングの吸気ダクト構造に関する。
【０００２】
【従来の技術】
例えば、特許第２７１１９８９号掲載公報及び同第３０１８２２６号掲載公報に示されるように、エンジン作業機は、防音構造のケーシング内に、エンジンと、該エンジンにより駆動される発電機を収納し、エンジンの吸気用やエンジン及び発電機を冷却するために、ケーシング内に空気を導入する吸気ダクトを、ケーシング内部の収納機器点検用のドアに開口する吸気口と、該吸気口からドア内壁面に沿って設けた吸気案内板にて形成される空気通路とで構成している。また、機種によっては、ケーシング天井壁内面に沿って空気通路を形成し、側壁に吸気口を開口するものもある。
【０００３】
【発明が解決しようとする課題】
ところが、ドア壁面に吸気口を開口するダクトは、空気通路の長さを十分にとれないため、騒音の減衰量が少ない。また、側壁に吸気口を開口するダクトは、天井壁内面の空気通路の長さをある程度とれるが、吸気口の位置が人の耳元高さに近く、騒音値が大きく感じられる。さらに、ルーフ部開口から雨水を吸い込んだ場合、ケーシング内に上部から水が垂れることがある。
【０００４】
そこで本発明は、ドア壁面に吸気口を開口しても、空気通路の長さを十分にとれて騒音を減衰させることができる防音構造ケーシングの吸気ダクト構造を提供することを目的としている。
【０００５】
【課題を解決するための手段】
上記した目的を達成するため、本発明は、内部収納機器点検用のドアに開口する吸気口と、該吸気口からドア内壁面に沿って設けた吸気案内板にて形成される空気通路とを有する防音構造ケーシングの吸気ダクト構造において、前記空気通路は、前記吸気口裏側のドア内壁面に設けられたドア部空気通路と前記ドア上部の前側壁内面から天井壁内面に沿って設けられた天井部空気通路とで構成され、前記ドア部空気通路は、上部、下部及び左右両側部の吸気案内板にて箱形に形成され、上部の吸気案内板に吸気出口が開口されており、前記天井部空気通路は、前記ドア上部の前側壁内面に設けられた前側壁吸気案内板と、天井壁内面の機器上部に設けられた天井壁側吸気案内板と、該天井壁側吸気案内板と前側壁吸気案内板との間に設けられた内部吸気案内板とで形成され、前記天井部空気通路内に突出する前記内部吸気案内板の上部に仕切板を設けて、前記天井部空気通路をラビリンス状に形成して、前記天井部空気通路の長さを長く設定し、前側壁吸気案内板に、ドア閉塞時のドア部空気通路の前記吸気出口と合致する位置に吸気入口を形成し、ドアを閉じた状態で前記吸気出口と前記吸気入口とが連通して、前記ドア部空気通路と前記天井部空気通路と連続する前記空気通路が形成され、前記天井壁側吸気案内板に、前記吸気出口とは別の吸気出口を開口したことを特徴としている。
【０００６】
【発明の実施の形態】
以下、本発明を図面に示される実施形態例に基づいて説明する。ケーシング１は、天井壁２及び前側壁３を含む４面の側壁内面と、前側壁３に設けられた内部収納機器点検用の観音開きのドア４，４の内面にそれぞれ吸音材を貼着して、防音構造に形成されている。開閉用のラッチ５を備えた一方のドア４には、ケーシング１内に収納したエンジン等の機器６冷却用の吸気ダクト７の吸気口８が開口している。
【０００７】
吸気ダクト７の空気通路９は、吸気口８裏側のドア４内壁面に設けられた箱形のドア部空気通路１０と、ドア４の上部の前側壁３内面から天井壁２内面に沿って設けられた天井部空気通路１１とで構成されている。ドア部空気通路１０は、下部吸気案内板１０ａ、左右の吸気案内板１０ｂ、上部吸気案内板１０ｃ及び内部吸気案内板１０ｄとから形成され、上部吸気案内板１０ｃに吸気出口１０ｅを開口している。
【０００８】
天井部空気通路１１は、ドア４上部の前側壁３内面に設けられた前側壁吸気案内板１１ａと、天井壁２内面の機器６上部に設けられた天井壁側吸気案内板１１ｂと、該天井壁側吸気案内板１１ｂと前側壁吸気案内板１１ａとの間に設けられた内部吸気案内板１１ｃとで形成され、天井部空気通路１１内に突出する内部吸気案内板１１ｃの上部に仕切板１１ｄを設けて、天井部空気通路１１をラビリンス状に形成して、天井部空気通路１１の長さを長くしている。
【０００９】
また、前側壁吸気案内板１１ａに吸気入口１１ｅを、天井壁側吸気案内板１１ｂに吸気出口１１ｆをそれぞれ開口し、吸気入口１１ｅは、ドア４閉塞時のドア部空気通路１０の吸気出口１０ｅと接続する位置に合致するよう形成されている。吸気入口１１ｅ周囲には、ドア４閉塞時に、ドア４の上部吸気案内板１０ｃが密着するパッキン１２が設けられている。これにより、ドア４を閉じた状態でドア部空気通路１０に天井部空気通路１１が連続する空気通路９が形成される。ドア側空気通路１０及び天井部空気通路１１のそれぞれの吸気案内板には吸音材が貼着されている。
【００１０】
このように構成することにより、ドア４を閉じた状態では、ドア部空気通路１０と天井部空気通路１１とが連続した空気通路９となり、空気通路９の長さが従来よりもはるかに長くなるから、図１に矢印で示されるように、エンジン等の機器６から発生する騒音は、天井部空気通路１１の吸気出口１１ｆから天井部空気通路１１の仕切板１１ｄにて屈曲されて、吸気入口１１ｅからドア部空気通路１０の吸気出口１０ｅを通過して吸気口８から外部に排出されるので、騒音の通過距離が長くなり、各空気通路の吸気案内板に貼着された吸音材に減衰される量が多くなって、騒音を減少させることができる。また、ドア４に吸気口８を開口することにより、開口面積を大きくとれ、適正風量を確保できる。さらに、吸気口８がドア４に開口することにより、吸気口の位置が下方になり耳元騒音を減少できる。
【００１１】
【発明の効果】
以上説明したように、本発明の防音構造ケーシングの吸気ダクト構造は、吸気口を開口した内部収納機器点検用のドア内壁面に沿って設けたドア部空気通路とドア上部の天井壁内面に沿って設けた吸気案内板にて形成した天井部空気通路とで空気通路を構成し、天井部空気通路の吸気入口を、ドア閉塞時のドア部空気通路の吸気出口と接続する位置に合致するよう形成したので、ドアを閉じた状態では、ドア部空気通路と天井部空気通路とが連続して空気通路の長さを十分にとれるから、内部収納機器から発生する騒音の通過距離が長くなり、騒音の減衰量が多くなって騒音を減少させることができる。また、吸気口の位置が下方になり耳元騒音を減少できる。さらに、ドアに吸気口を開口することにより、開口面積を大きくとれ、適正風量を確保できる。
【図面の簡単な説明】
【図１】図２のＩ−Ｉ断面図
【図２】ケーシングの正面図
【符号の説明】
１…ケーシング、２…天井壁、３…前側壁、４…ドア、７…吸気ダクト、８…吸気口、９…空気通路、１０…ドア部空気通路、１０ｅ…ドア部空気通路の吸気出口、１１…天井部空気通路、１１ｅ…天井部空気通路の吸気入口[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an intake duct structure of a soundproof structure casing of an engine working machine that houses therein an engine and a power supply source such as a generator driven by the engine, a compressor, and a hydraulic pump.
[0002]
[Prior art]
For example, as shown in Japanese Patent Nos. 2711989 and 3018226, an engine working machine houses an engine and a generator driven by the engine in a soundproof casing. An intake duct that introduces air into the casing for cooling the intake and the engine and the generator is provided with an intake opening that opens to a door for checking storage equipment inside the casing, and from the intake opening along the inner wall surface of the door. And an air passage formed by the provided air intake guide plate. Also, depending on the model, there is an air passage that is formed along the inner surface of the casing ceiling wall and an air inlet is opened in the side wall.
[0003]
[Problems to be solved by the invention]
However, the duct that opens the air inlet to the door wall surface has a small amount of noise attenuation because the length of the air passage cannot be taken sufficiently. In addition, the duct that opens the air inlet to the side wall can take a certain length of the air passage on the inner surface of the ceiling wall, but the position of the air inlet is close to the height of the ears of the person, and the noise level is felt large. Furthermore, when rainwater is sucked in from the opening of the roof part, water may droop from the upper part in the casing.
[0004]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an intake duct structure for a soundproof structure casing that can sufficiently reduce the length of an air passage even when an intake port is opened on a door wall surface.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention includes an intake opening that opens to a door for checking internal storage equipment, and an air passage formed by an intake guide plate provided along the inner wall surface of the door from the intake opening. In the air intake duct structure of the soundproof structure casing, the air passage includes a door portion air passage provided on the inner wall surface of the door on the back side of the air inlet and a ceiling provided along the ceiling wall inner surface from the inner surface of the front side wall of the upper portion of the door. The door air passage is formed in a box shape with upper, lower and left and right intake guide plates, and an intake outlet is opened in the upper intake guide plate. The front air intake guide plate provided on the inner surface of the front side wall of the upper portion of the door, the air intake guide plate on the ceiling wall side provided on the upper portion of the equipment on the inner surface of the ceiling wall, Provided between the side wall intake guide plate The ceiling air passage is formed with an internal air intake guide plate, and a partition plate is provided on an upper portion of the internal air intake guide plate protruding into the ceiling air passage, and the ceiling air passage is formed in a labyrinth shape. The intake inlet plate is formed in the front side wall intake guide plate at a position that matches the intake outlet of the door air passage when the door is closed, and the intake outlet and the intake air are closed when the door is closed. The inlet is in communication, the air passage continuing to the door air passage and the ceiling air passage is formed, and an air intake outlet different from the air intake outlet is opened in the ceiling wall side air intake guide plate. It is characterized by.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on an embodiment shown in the drawings. The casing 1 has sound absorbing materials attached to the inner surfaces of the four side walls including the ceiling wall 2 and the front side wall 3 and the inner surfaces of the double doors 4 and 4 for checking the internal storage equipment provided on the front side wall 3. It is formed in a soundproof structure. An intake port 8 of an intake duct 7 for cooling a device 6 such as an engine housed in the casing 1 is opened in one door 4 provided with a latch 5 for opening and closing.
[0007]
The air passage 9 of the intake duct 7 is provided along the inner surface of the ceiling wall 2 from the inner surface of the front side wall 3 on the upper side of the door 4 and the box-shaped door portion air passage 10 provided on the inner wall surface of the door 4 on the back side of the intake port 8. The ceiling air passage 11 is formed. The door air passage 10 is formed by a lower intake guide plate 10a, left and right intake guide plates 10b, an upper intake guide plate 10c, and an internal intake guide plate 10d, and an intake outlet 10e is opened in the upper intake guide plate 10c. .
[0008]
The ceiling air passage 11 includes a front side wall intake guide plate 11a provided on the inner surface of the front side wall 3 above the door 4, a ceiling wall side intake guide plate 11b provided on the upper side of the device 6 on the inner surface of the ceiling wall 2, and the ceiling. A partition plate 11d is formed on the upper side of the internal intake guide plate 11c which is formed by an internal intake guide plate 11c provided between the wall side intake guide plate 11b and the front side wall intake guide plate 11a and protrudes into the ceiling air passage 11. The ceiling air passage 11 is formed in a labyrinth shape so that the length of the ceiling air passage 11 is increased.
[0009]
Further, an intake inlet 11e is opened in the front side wall intake guide plate 11a, and an intake outlet 11f is opened in the ceiling wall side intake guide plate 11b. The intake inlet 11e is connected to the intake outlet 10e of the door air passage 10 when the door 4 is closed. It is formed so as to match the connecting position. A packing 12 is provided around the intake inlet 11e so that the upper intake guide plate 10c of the door 4 is in close contact with the door 4 when the door 4 is closed. As a result, an air passage 9 is formed in which the ceiling portion air passage 11 continues to the door portion air passage 10 with the door 4 closed. A sound absorbing material is attached to each of the intake guide plates of the door side air passage 10 and the ceiling air passage 11.
[0010]
With this configuration, when the door 4 is closed, the door air passage 10 and the ceiling air passage 11 become a continuous air passage 9, and the length of the air passage 9 is much longer than before. 1, the noise generated from the engine 6 or the like is bent by the partition plate 11d of the ceiling air passage 11 from the intake air outlet 11f of the ceiling air passage 11 to the intake air inlet. 11e passes through the intake outlet 10e of the door air passage 10 and is discharged to the outside from the intake port 8, so that the noise passing distance becomes longer and is attenuated by the sound absorbing material attached to the intake guide plate of each air passage. The amount to be increased can reduce the noise. Further, by opening the intake port 8 in the door 4, the opening area can be increased and an appropriate air volume can be secured. Furthermore, when the intake port 8 opens in the door 4, the position of the intake port is lowered, and ear noise can be reduced.
[0011]
【The invention's effect】
As described above, the air intake duct structure of the soundproof structure casing according to the present invention is provided along the door portion air passage provided along the inner wall surface of the door for inspecting the internal storage device having the air intake opening and the inner surface of the ceiling wall above the door. The air passage is composed of a ceiling air passage formed by the air intake guide plate provided to match the position where the air inlet of the ceiling air passage is connected to the air outlet of the door air passage when the door is closed. Since it is formed, when the door is closed, the door air passage and the ceiling air passage are continuous and the length of the air passage can be taken sufficiently, so the passage distance of noise generated from the internal storage device becomes long, Noise attenuation can be increased and noise can be reduced. In addition, the position of the intake port is lowered and the ear noise can be reduced. Furthermore, by opening the intake port in the door, the opening area can be increased and an appropriate air volume can be secured.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view taken along the line II in FIG. 2. FIG. 2 is a front view of a casing.
DESCRIPTION OF SYMBOLS 1 ... Casing, 2 ... Ceiling wall, 3 ... Front side wall, 4 ... Door, 7 ... Intake duct, 8 ... Intake port, 9 ... Air passage, 10 ... Door part air passage, 10e ... Intake outlet of door part air passage, 11: Ceiling air passage, 11e: Inlet inlet of the ceiling air passage

Claims

In an air intake duct structure of a soundproof structure casing having an air inlet opening to a door for checking internal storage equipment and an air passage formed by an air intake guide plate provided along the inner wall surface of the door from the air inlet. The passage is composed of a door portion air passage provided on the inner wall surface of the door on the back side of the intake port and a ceiling portion air passage provided along the inner surface of the front wall from the front side wall of the upper portion of the door. The passage is formed in a box shape with intake guide plates on the upper, lower and left and right sides, an intake outlet is opened in the upper intake guide plate, and the ceiling air passage is formed on the inner surface of the front side wall of the upper portion of the door A front wall intake guide plate provided on the ceiling wall, a ceiling wall side intake guide plate provided on the upper part of the device on the inner surface of the ceiling wall, and an interior provided between the ceiling wall side intake guide plate and the front wall intake guide plate The ceiling formed with an air intake guide plate A partition plate is provided on an upper portion of the internal intake guide plate protruding into the air passage, the ceiling air passage is formed in a labyrinth shape, the length of the ceiling air passage is set long, and the front side air intake guide An intake inlet is formed in the plate at a position that matches the intake outlet of the door air passage when the door is closed, and the intake outlet and the intake inlet communicate with each other when the door is closed. An air intake duct structure of a soundproof structure casing, wherein the air passage continuing to the ceiling air passage is formed, and an air intake outlet different from the air intake outlet is opened in the air intake guide plate on the ceiling wall side .