KR20110056736A - Construction equipment having an improved fire barrier - Google Patents

Construction equipment having an improved fire barrier Download PDF

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Publication number
KR20110056736A
KR20110056736A KR1020090113187A KR20090113187A KR20110056736A KR 20110056736 A KR20110056736 A KR 20110056736A KR 1020090113187 A KR1020090113187 A KR 1020090113187A KR 20090113187 A KR20090113187 A KR 20090113187A KR 20110056736 A KR20110056736 A KR 20110056736A
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South Korea
Prior art keywords
firewall
construction equipment
cowl frame
engine
soft
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KR1020090113187A
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Korean (ko)
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KR101161305B1 (en
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김성환
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볼보 컨스트럭션 이큅먼트 에이비
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Priority to KR1020090113187A priority Critical patent/KR101161305B1/en
Publication of KR20110056736A publication Critical patent/KR20110056736A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/24—Safety devices, e.g. for preventing overload
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts

Abstract

PURPOSE: Construction equipment having an improved fire barrier is provided to prevent the ignition of working fluid at an engine by partitioning a cowl frame into an engine room and a pump room. CONSTITUTION: Construction equipment having an improved fire barrier comprises a firewall a diesel particle filter. The firewall is composed of a hard firewall and a soft firewall. The hard firewall is made of a steel material. The soft firewall is made of a silicon material. The soft firewall is installed in a cowl frame(130) using the steel plate. The diesel particle filter is installed in the cowl frame using the filter bracket.

Description

개선된 방화벽을 구비한 건설중장비{CONSTRUCTION EQUIPMENT HAVING AN IMPROVED FIRE BARRIER}CONSTRUCTION EQUIPMENT HAVING AN IMPROVED FIRE BARRIER}

본 발명은 건설중장비에 관한 것으로, 보다 상세하게는 건설중장비의 카울프레임에 설치되어 카울프레임을 엔진실과 펌프실로 구획하며 유압펌프의 고장이나 누유에 의해 작동유체가 엔진에서 발화되는 것을 방지할 뿐만 아니라 조립성을 향상시킨 개선된 방화벽을 구비한 건설중장비에 관한 것이다.The present invention relates to a heavy construction equipment, and more particularly, it is installed in a cowl frame of heavy construction equipment to partition the cowl frame into the engine compartment and the pump chamber, and to prevent the working fluid from being ignited by the engine due to the failure or leakage of the hydraulic pump. A construction heavy equipment with an improved firewall having improved assembly.

일반적으로 굴삭기 등과 같은 건설중장비에는 도 1에 도시된 바와 같이 엔진(110)과 메인펌프(120) 등의 부품들을 고정하기 위한 카울프레임(130)이 상부프레임에 설치되며, 머플러(140)는 엔진(110)의 일단에 4개의 볼트로 지지된 브래킷에 의해서 설치된다. In general, in the construction equipment such as excavators, as shown in Figure 1, the cowl frame 130 for fixing the components such as the engine 110 and the main pump 120 is installed on the upper frame, muffler 140 is the engine One end of the 110 is installed by a bracket supported by four bolts.

상기 카울프레(130)임에는 도 2에 도시된 바와 같이 방화벽(150)이 설치되고, 이 방화벽(150)은 도 1 및 2에 도시된 바와 같이 카울프레임(130)을 엔진실(130a)과 펌프실(130b)로 구획하며 유압유 등의 작동유체 및 연료가 흐르는 호스(160)들이 외부 충격 및 내부 고압으로 인하여 터졌을 경우 비산되는 작동유와 연료가 높은 온도의 열을 방출하는 엔진(110) 및 머플러(140)와 접촉되어 화재가 발생되는 것을 방지하는 역할을 한다.The cowl pre 130 is provided with a firewall 150 as shown in FIG. 2, and the firewall 150 includes the cowl frame 130 as shown in FIGS. 1 and 2. The engine 110 and the muffler 140 are divided into 130b and the hydraulic fluid such as hydraulic oil and the hoses 160 through which fuel flows are blown out due to external shock and internal high pressure. ) To prevent fire from coming into contact with

종래의 선행기술은 머플러가 카울프레임과는 별개로 엔진에 조립되어 있고, 유압 펌프 및 연료 탱크와 연결되어 있는 호스들의 배열이 비교적 단순하기 때문에 도 2에 도시된 바와 같이 스틸 소재로만 이루어진 방화벽(150)이 설치된다.The prior art is a firewall 150 made of steel only as shown in Figure 2 because the muffler is assembled to the engine separately from the cowl frame and the arrangement of hoses connected to the hydraulic pump and fuel tank is relatively simple. ) Is installed.

이 경우 방화벽(150) 설치부의 각종 호스들의 배열이 단순하더라도 호스들의 조립 공차 및 장비 운행 시 맥동(microseism, 수십분의 1초에서 수십 초의 주기로 끊임없이 미약하게 진동하는 현상)이 생길 경우 스틸 방화벽(150)에 의해서 호스가 손상을 입을 가능성이 많다.In this case, even if the arrangement of the various hoses of the firewall 150 is simple, if the assembly tolerances of the hoses and equipment pulsation (microseism, a phenomenon that constantly vibrates in a few tens of seconds to several tens of seconds) occurs if the steel firewall 150 The hose is likely to be damaged.

향후 T4엔진이 적용될 중장비의 경우 도 3에 도시된 바와 같이 기어펌프 또는 정용량형 기어펌프(170)가 기존 엔진의 중앙부에서 메인펌프(120)쪽으로 이동되어 설치된다. 이 때문에 방화벽(150) 설치부에 호스(160)가 추가되는 등 해당 부위의 형상이 복잡해져서 기존 장비와 같이 스틸 소재로만 된 방화벽(150)을 설치 할 경우 호스 및 각종 배선이 방화벽에 간섭 될 가능성이 높고 조립성 또한 매우 나쁘다. 또한, 간섭 방지를 위해 해당 호스들과 방화벽 사이의 간격을 크게 할 경우 유압유 및 연료의 비산 시 방화벽으로서의 역할을 이행하지 못하여 화재 발생의 가능성이 커지게 된다.In the case of heavy equipment to which the T4 engine will be applied in the future, as shown in FIG. 3, the gear pump or the fixed-capacity gear pump 170 is installed by moving toward the main pump 120 from the center of the existing engine. For this reason, the hose 150 is added to the installation portion of the firewall 150, and thus the shape of the corresponding portion is complicated, so when installing the firewall 150 made of steel only like the existing equipment, the hose and various wirings may interfere with the firewall. This is high and the assembly is also very bad. In addition, when the distance between the hoses and the firewall is increased to prevent the interference, the possibility of a fire increases because the hydraulic oil and fuel do not fulfill the role of the firewall.

한편, 앞으로의 중장비 차량에는 기존의 머플러가 아닌 디젤입자필터(DPF,Diesel Particulate Filter)를 장착되는 데, 이 디젤입자필터는 기존 머플러에 비해 무게가 증가되었을 뿐만 아니라 내부에 장착되어 있는 필터 등의 각종 부품은 진동에 매우 취약하므로 현재와 같이 엔진에 조립할 경우 손상될 위험이 큰 문제점이 있다.In the future, heavy-duty vehicles are equipped with a diesel particulate filter (DPF) instead of a conventional muffler. This diesel particle filter not only has an increased weight compared to a conventional muffler, but also has a built-in filter. Since various parts are very vulnerable to vibration, there is a large risk of damage when assembled to the engine as in the present.

본 발명은 상술한 바와 같은 문제점을 해결하기 위해 안출 된 것으로, 본 발명의 일 실시예는 유압펌프의 고장이나 누유에 의해 작동유체가 엔진에서 발화되는 것을 방지할 뿐만 아니라 조립성을 향상시킨 개선된 방화벽을 구비한 건설중장비와 관련된다.The present invention has been made to solve the problems described above, an embodiment of the present invention is to improve the assembly as well as to prevent the working fluid from being ignited in the engine by the failure or leakage of the hydraulic pump Related to heavy construction equipment with a firewall.

본 발명의 바람직한 일 실시예는 건설중장비의 카울프레임에 설치되어 카울프레임을 엔진실과 펌프실로 구획하며 유압펌프의 고장이나 누유에 의해 작동유체가 엔진에서 발화되는 것을 방지하는 방화벽을 구비한 건설중장비에 있어서, 방화벽은 경질방화벽과 연질방화벽으로 구성되는 것을 특징으로 하는 개선된 방화벽을 구비한 건설중장비를 제공한다.One preferred embodiment of the present invention is installed in the cowl frame of the construction equipment to divide the cowl frame into the engine room and the pump room and the construction equipment with a firewall to prevent the working fluid from being ignited in the engine by the failure or leakage of the hydraulic pump The firewall provides heavy equipment with an improved firewall, characterized in that it consists of a hard firewall and a soft firewall.

상술한 바와 같은 본 발명의 일 실시예에 따르면 첫째, 유압펌프의 고장이나 누유에 의해 작동유체가 엔진에서 발화되는 것을 방지할 뿐만 아니라 조립성을 향상시킨 개선된 방화벽을 구비한 건설중장비를 제공할 수 있다.According to one embodiment of the present invention as described above, first, to provide a heavy construction equipment having an improved firewall not only prevents the working fluid from being ignited in the engine due to breakdown or leakage of the hydraulic pump, but also improves the assembly. Can be.

둘째, 방화벽을 경질방화벽과 연질방화벽으로 구분하여 설치함으로써 호스의 조립 공차 및 장비의 운행 시 발생되는 맥동에 의한 호스의 손상을 최소화할 수 있다.Second, by dividing the firewall into a hard firewall and a soft firewall, it is possible to minimize the damage of the hose due to the hose assembly tolerance and the pulsation generated during the operation of the equipment.

셋째, 연질방화벽이 스틸플레이트에 의해서 카울프레임에 설치되므로 조립 및 교체가 용이하여 작업 효율을 향상시킬 수 있다.Third, since the soft firewall is installed on the cowl frame by a steel plate, it is easy to assemble and replace, thereby improving work efficiency.

도 4 는 본 발명의 바람직한 실시예에 따른 개선된 방화벽을 구비한 건설중장비에 채용된 카울프레임과 이 카울프레임에 디젤입자필터가 설치된 상태를 나타낸 사시도이고, 도 5 는 도 4를 수평 방향으로 회전시킨 상태를 도시한 사시도이고, 도 6 은 본 발명의 바람직한 실시예에 따른 개선된 방화벽을 구비한 건설중장비에 채용된 방화벽이 카울프레임에 설치된 상태를 나타낸 평면도이고, 도 7 은 도 6에 도시된 연질방화벽이 스틸플레이트에 의해서 카울프레임에 설치된 상태를 나타낸 평면도이고, 도 8 은 도 4에 도시된 카울프레임에 메인펌프와 기어펌프와 방화벽과 디젤입자필터가 설치된 상태를 나타낸 사시도이다.4 is a perspective view showing a cowl frame employed in a heavy construction equipment with an improved firewall according to a preferred embodiment of the present invention and a diesel particulate filter is installed on the cowl frame, Figure 5 is rotated in Figure 4 in the horizontal direction Figure 6 is a perspective view showing a state, Figure 6 is a plan view showing a state in which the firewall employed in the heavy construction equipment equipped with an improved firewall according to a preferred embodiment of the present invention installed in the cowl frame, Figure 7 is shown in Figure 6 The soft firewall is a plan view showing a state installed in the cowl frame by a steel plate, Figure 8 is a perspective view showing a state in which the main pump, gear pump, firewall and diesel particle filter is installed in the cowl frame shown in FIG.

본 발명의 바람직한 실시예에 따른 개선된 방화벽을 구비한 건설중장비(1)는 카울프레임(10), 방화벽(20), 디젤입자필터(30)를 포함한다.The construction equipment 1 having the improved firewall according to the preferred embodiment of the present invention includes a cowl frame 10, a firewall 20, and a diesel particle filter 30.

카울프레임(cowl frame,10)은 도 4 및 5에 도시된 바와 같이 후술할 방화벽(20)에 의해서 엔진실(11)과 펌프실(12)로 구획되며, 이 카울프레임(10)에는 엔진, 메인펌프(12a), 후술할 디젤입자필터(30) 등이 설치된다.The cowl frame 10 is divided into an engine chamber 11 and a pump chamber 12 by a firewall 20 to be described later as shown in FIGS. 4 and 5, and the cowl frame 10 includes an engine and a main body. The pump 12a, the diesel particle filter 30 mentioned later, etc. are provided.

방화벽(20)은 카울프레임(10)에 설치되어 카울프레임(10)을 엔진실(11)과 펌프실(12)로 구획하며 유압펌프의 고장이나 누유에 의해 작동유체가 엔진에서 발화 되는 것을 방지한다. 이 방화벽(20)은 도 6에 도시된 바와 같이 호스 등의 손상 방지를 위해서 경질방화벽(21)과 연질방화벽(22)으로 구성되는 것이 바람직하며, 메인펌프(12a)가 위치하는 곳은 경질방화벽(21)이 설치되고 기어펌프 또는 정용량형 기어펌프(12b)가 설치되는 곳은 연질방화벽(22)이 설치되는 것이 바람직하다.The firewall 20 is installed in the cowl frame 10 to divide the cowl frame 10 into the engine chamber 11 and the pump chamber 12, and prevents the working fluid from being ignited by the engine due to breakdown or leakage of the hydraulic pump. . As shown in FIG. 6, the firewall 20 is preferably composed of a hard fire wall 21 and a soft fire wall 22 in order to prevent damage to a hose, etc., where the main pump 12a is located. Where the 21 is installed and the gear pump or the fixed capacity gear pump 12b is installed, it is preferable that the soft fire wall 22 is installed.

상기 경질방화벽(21)은 바람직하게는 스틸 소재를 사용하고, 상기 연질방화벽(22)은 실리콘 소재를 사용하는 것이 바람직하다. 이 경우 내화성을 가진 실리콘 소재의 연질방화벽(22)과 스틸 소재의 경질방화벽(21)을 병행하여 사용함으로써 호스 및 펌프와의 밀착이 최대한으로 증가되며, 호스 및 펌프와 방화벽(20) 사이의 간격이 줄어들어 장비의 진동 시 간섭이 발생되더라도 실리콘 소재의 플렉시블(flexible)한 성질로 인해 호스 등의 손상이 방지된다.Preferably, the hard fire wall 21 is made of steel, and the soft fire wall 22 is made of silicon. In this case, by using the soft fire barrier 22 made of silicon material having fire resistance and the hard fire wall 21 made of steel in parallel, the adhesion between the hose and the pump is increased to the maximum, and the gap between the hose and the pump and the firewall 20 is increased. This reduces the damage of the hose due to the flexible nature of the silicone material even if interference occurs during equipment vibration.

상기 연질방화벽(22)은 도 7에 도시된 바와 같이 스틸플레이트(22a)에 의해서 카울프레임(10)에 설치되며, 이 경우 조임 공구를 사용할 수 있을 뿐만 아니라 탈부착이 용이하여 작업 효율이 향상되는 이점이 있다.The soft fire wall 22 is installed on the cowl frame 10 by the steel plate 22a as shown in FIG. 7, in this case, not only a tightening tool can be used but also an easy attachment and detachment, thereby improving work efficiency. There is this.

디젤필터입자(DPF,Diesel Particulate Filter)는 종래의 머플러를 대체하는 것으로서, 이는 기존 머플러에 비해 무게가 증가되었을 뿐만 아니라 내부에 장착되어 있는 필터 등의 각종 부품이 진동에 매우 취약한 면이 있다. 본 발명의 바람직한 실시예에서 디젤입자필터(30)는 전술한 문제점을 극복하기 위해 엔진에 설치되 는 것이 아니라 도 4 및 5에 도시된 바와 같이 필터브래킷(30a)에 의해서 카울프레임(10)에 설치된다.Diesel filter particles (DPF, Diesel Particulate Filter) is to replace the conventional muffler, which is not only increased in weight compared to the existing muffler, but also various components such as the filter mounted therein is very vulnerable to vibration. In the preferred embodiment of the present invention, the diesel particle filter 30 is not installed in the engine to overcome the above-mentioned problems, but is mounted on the cowl frame 10 by the filter bracket 30a as shown in FIGS. 4 and 5. Is installed.

상기 필터브래킷(30a)은 도 5에 도시된 바와 같이 카울프레임(10)의 상측에 설치되며, 펌프실(12)의 개구된 상측을 완전히 밀폐하도록 설치되는 것이 바람직하다. 이 경우 방화벽(20)에 의한 측면이 밀폐되고 필터브래킷(30a)에 의해서 상측이 밀폐되므로 펌프의 고장이나 누유에 의해 작동유체가 엔진으로 전달되어 발화되는 것을 더 효과적으로 방지할 수 있다.The filter bracket 30a is installed above the cowl frame 10 as shown in FIG. 5, and is preferably installed to completely seal the opened upper side of the pump chamber 12. In this case, since the side by the firewall 20 is sealed and the upper side is sealed by the filter bracket 30a, the working fluid is transferred to the engine by the failure or leakage of the pump, and thus it is possible to more effectively prevent the fire.

본 발명은 특허청구범위에서 청구하는 요지를 벗어나지 않고도 당해 기술분야에서 통상의 지식을 가진 자에 의하여 다양하게 변경 실시될 수 있으므로, 본 발명의 기술보호범위는 상술한 특정의 바람직한 실시예에 한정되지 않는다.As the present invention can be variously modified by those skilled in the art without departing from the scope of the claims, the technical protection scope of the present invention is not limited to the specific preferred embodiments described above. Do not.

도 1 은 종래 건설중장비의 카울프레임에 머플러가 장착된 상태를 나타낸 사시도,1 is a perspective view showing a state in which a muffler is mounted on a cowl frame of conventional construction equipment;

도 2 는 도 1에 도시된 건설중장비에 방화벽과 메인펌프가 설치된 상태와 유압 호스 등의 배열 상태를 나타낸 사시도,Figure 2 is a perspective view showing the arrangement state of the hydraulic hose and the state installed with the firewall and the main pump in the heavy construction equipment shown in Figure 1,

도 3 은 도 1에 도시된 건설중장비에 기어펌프와 그에 따른 유압 호스 등이 더 설치된 상태를 나타낸 사시도,3 is a perspective view showing a state in which a gear pump and a hydraulic hose and the like are further installed in the heavy construction equipment shown in FIG. 1;

도 4 는 본 발명의 바람직한 실시예에 따른 개선된 방화벽을 구비한 건설중장비에 채용된 카울프레임과 이 카울프레임에 디젤입자필터가 설치된 상태를 나타낸 사시도,4 is a perspective view showing a cowl frame and a diesel particle filter installed in the cowl frame employed in a heavy construction equipment having an improved firewall according to a preferred embodiment of the present invention,

도 5 는 도 4를 수평 방향으로 회전시킨 상태를 도시한 사시도,5 is a perspective view illustrating a state in which FIG. 4 is rotated in a horizontal direction;

도 6 은 본 발명의 바람직한 실시예에 따른 개선된 방화벽을 구비한 건설중장비에 채용된 방화벽이 카울프레임에 설치된 상태를 나타낸 평면도,6 is a plan view showing a state in which the firewall employed in the heavy construction equipment equipped with an improved firewall according to an embodiment of the present invention installed in the cowl frame,

도 7 은 도 6에 도시된 연질방화벽이 스틸플레이트에 의해서 카울프레임에 설치된 상태를 나타낸 평면도,7 is a plan view showing a state in which the soft firewall shown in Figure 6 is installed on the cowl frame by a steel plate,

도 8 은 도 4에 도시된 카울프레임에 메인펌프와 기어펌프와 방화벽과 디젤입자필터가 설치된 상태를 나타낸 사시도이다.8 is a perspective view showing a state in which a main pump, a gear pump, a firewall, and a diesel particle filter are installed in the cowl frame shown in FIG. 4.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 개선된 방화벽을 구비한 건설중장비 10 : 카울프레임1: Heavy construction equipment with improved firewall 10: Cowl frame

11 : 엔진실 12 : 펌프실11: engine room 12: pump room

12a : 메인펌프 12b : 기어펌프12a: main pump 12b: gear pump

20 : 방화벽 21 : 경질방화벽20: firewall 21: hard firewall

22 : 연질방화벽 22a : 스틸플레이트22: soft firewall 22a: steel plate

30 : 디젤입자필터 30a : 필터브래킷30: diesel particle filter 30a: filter bracket

Claims (5)

건설중장비의 카울프레임에 설치되어 상기 카울프레임을 엔진실과 펌프실로 구획하며 유압펌프의 고장이나 누유에 의해 작동유체가 엔진에서 발화되는 것을 방지하는 방화벽을 구비한 건설중장비에 있어서,In the heavy construction equipment installed in the cowl frame of the heavy construction equipment is divided into the engine chamber and the pump chamber and the firewall to prevent the working fluid from being ignited in the engine by the failure or leakage of the hydraulic pump, 상기 방화벽은 경질방화벽과 연질방화벽으로 구성되는 것을 특징으로 하는 개선된 방화벽을 구비한 건설중장비.The firewall is heavy construction equipment with an improved firewall, characterized in that consisting of a hard and soft firewall. 제 1 항에 있어서,The method of claim 1, 상기 경질방화벽은 스틸 재질로 형성된 것을 특징으로 하는 개선된 방화벽을 구비한 건설중장비.The hard firewall is a construction heavy equipment with an improved firewall, characterized in that formed of a steel material. 제 1 항에 있어서,The method of claim 1, 상기 연질방화벽은 실리콘 재질로 형성된 것을 특징으로 하는 개선된 방화벽을 구비한 건설중장비.The soft firewall is under construction with an improved firewall, characterized in that formed of silicon material. 제 1 항 내지 제 3 항 중 어느 한 항에 있어서,4. The method according to any one of claims 1 to 3, 상기 카울프레임에 설치되는 디젤입자필터를 더 구비하며, 상기 디젤입자필터는 필터브래킷에 의해서 상기 카울프레임에 설치되는 것을 특징으로 하는 개선된 방화벽을 구비한 건설중장비.And a diesel particle filter installed in the cowl frame, wherein the diesel particle filter is installed in the cowl frame by a filter bracket. 제 4 항에 있어서,The method of claim 4, wherein 상기 연질방화벽은 스틸플레이트에 의해서 상기 카울프레임에 설치되는 것을 특징으로 하는 개선된 방화벽을 구비한 건설중장비.The soft firewall is under construction with an improved firewall, characterized in that installed on the cowl frame by a steel plate.
KR1020090113187A 2009-11-23 2009-11-23 Construction equipment having an improved fire barrier KR101161305B1 (en)

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JP2020045658A (en) * 2018-09-18 2020-03-26 日立建機株式会社 Construction machine

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JP4057860B2 (en) * 2002-08-12 2008-03-05 新キャタピラー三菱株式会社 Work machine
JP2005068810A (en) * 2003-08-25 2005-03-17 Hitachi Constr Mach Co Ltd Shielding device for construction machine
JP4394527B2 (en) * 2004-07-12 2010-01-06 日立建機株式会社 Cab equipment for construction machinery

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* Cited by examiner, † Cited by third party
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JP2020045658A (en) * 2018-09-18 2020-03-26 日立建機株式会社 Construction machine

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