Construction machinery

Abstract

To provide a construction machine capable of elongating a total operation time and improving mountability (easiness to mount) of a gas container.SOLUTION: A hydraulic shovel 1 comprises: a travelable lower traveling body 2 and a superstructure 3; and an operation device 4 attached on the superstructure 3. On the superstructure 3. a gas engine 13 is mounted. On the superstructure 3, a plurality (two) of gas containers 41, 42 for storing gas fuel of the gas engine 13 are mounted. In this case, the superstructure 3 comprises: a first gas container mounting part 22 on which the first gas container 41 is mounted; and a second gas container mounting part 23 which is arranged inside the superstructure 3 than the first gas container mounting part 22, and on which the second gas container 42 different from the first gas container 41 is mounted at a higher position than that of the first gas container 41 mounted on the first gas container mounting part 22.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to construction machinery such as hydraulic excavators and wheel loaders equipped with a gas engine as a prime mover. [Background technology]

[0002] For example, a hydraulic excavator, a typical example of construction machinery, comprises a self-propelled lower traveling body, an upper rotating body rotatably mounted on the lower traveling body via a rotating device, and a work device provided on the front side of the upper rotating body. The upper rotating body has a rotating frame serving as a base, and on the rotating frame are mounted a prime mover such as a diesel engine, a hydraulic pump driven by the prime mover, a hydraulic oil tank for storing hydraulic oil, and an exterior cover (building cover) that covers the prime mover, hydraulic pump, hydraulic oil tank, etc.

[0003] In recent years, gas engines that produce clean exhaust gas and have excellent cost performance, such as gas engines that use liquefied petroleum gas (LPG) as fuel, have been attracting attention. For example, Patent Document 1 describes a slewing work vehicle equipped with a gas engine that uses liquefied gas as fuel and a gas container (gas cylinder). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 06-320968 Summary of the Invention [Problem to be solved by the invention]

[0005] Gas containers store LPG liquid, which is condensed by applying high pressure to gaseous LPG. For this reason, gas containers are made of high-strength metal and are cylindrical in shape to allow pressure to escape easily. The gas flow rate discharged from such gas containers is always supplied to the engine at a constant pressure, regardless of the engine load.

[0006] On the other hand, in the case of the rotating work vehicle of Patent Document 1, considering the standards of currently available gas cylinders, the fuel capacity of the gas cylinder is small relative to the fuel consumption, and the total operating time is shorter compared to construction machinery with diesel engines that use light oil. Furthermore, gas cylinders are heavy due to their structure. Therefore, considering that gas cylinders will be loaded onto construction machinery by hand, it is preferable that the construction machinery be designed to make it easy to load gas cylinders.

[0007] An object of the present invention is to provide a construction machine that can extend the total operating time and improve the mountability (ease of mounting) of a gas container. [Means for solving the problem]

[0008] The present invention relates to a construction machine including a vehicle body on which a gas engine is mounted and a working device attached to the vehicle body, wherein the vehicle body includes a first gas container mounting portion on which a first gas container for storing gas fuel for the gas engine is mounted. The bottom part and the above bottom and Raised a second gas container mounting portion on which a second gas container different from the first gas container is mounted at a position higher than the first gas container mounted on the first gas container mounting portion; The raised bottom and, a support portion having a first support hole into which the first gas container is inserted and a second support hole into which the second gas container is inserted, the support portion being disposed above the bottom portion and the raised bottom portion; and a fixing mechanism for holding the first gas container and the second gas container from above. Equipped with The fixing mechanism includes: a rising member extending upward from the support portion; a holding member whose base end side is cantilevered on the upper end side of the rising member as a swing center and whose tip end side is swingable in the vertical direction above the first gas container and the second gas container; and a connecting member that is attachable to and detachable from the tip end side of the holding member and the support portion and connects the tip end side of the holding member and the support portion. are. [Effects of the Invention]

[0009] According to the present invention, the total operating time can be increased and the mountability of heavy gas containers can be improved. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a right side view showing a hydraulic excavator according to an embodiment. [Figure 2] FIG. 2 is a perspective view showing a revolving frame, a gas engine, a cab, a gas container fixing device, a first gas container, a second gas container, etc. [Figure 3] FIG. 3 is a perspective view showing a state in which the gas engine is removed from FIG. 2. [Figure 4] 4 is a perspective view taken from the same position as FIG. 3, illustrating a state in which the stopper members (retaining members) are released from pressing down on the first gas container and the second gas container. FIG. [Figure 5] 4 is a perspective view showing a state in which the first gas container, the second gas container, and the gas container fixing device are removed from FIG. 3. FIG. [Figure 6] 4 is a front view (viewed from the right side of FIG. 3) showing the revolving frame, the cab, the gas container fixing device, the first gas container, the second gas container, etc. FIG. [Figure 7] FIG. 2 is a cross-sectional view showing a swivel frame, a gas container fixing device, a first gas container, a second gas container, etc. [Figure 8] FIG. 2 is a perspective view showing a gas container fixing device, a first gas container, and a second gas container. [Figure 9] 10 is a perspective view showing the gas container fixing device when the first gas container and the second gas container are replaced. FIG. [Figure 10] FIG. 10 is a perspective view of FIG. 9 as seen from the left side. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings, taking as an example a case where the embodiment is applied to a hydraulic excavator, which is a typical construction machine (work machine), and more specifically, to a small hydraulic excavator.

[0012] In the following description, the front side of the hydraulic excavator 1 is the side of the working implement 4, and the rear side is the side of the counterweight 12, which is opposite the working implement 4. The left and right direction of the hydraulic excavator 1 is a direction perpendicular to the front and back direction. For example, in FIG. 1, the left and right direction on the paper surface corresponds to the front and back direction of the hydraulic excavator 1 (X direction), the front and back direction of the paper surface corresponds to the left and right direction of the hydraulic excavator 1 (Y direction), and the up and down direction of the paper surface corresponds to the up and down direction of the hydraulic excavator 1 (Z direction).

[0013] A hydraulic excavator 1 as a construction machine (work machine) is used, for example, at work sites such as civil engineering, demolition, and underground construction sites. The hydraulic excavator 1 of the embodiment is configured as a small hydraulic excavator (mini excavator, small hydraulic excavator) (for example, machine weight of about 1 to 6 tons) suitable for work in a narrow work site. The hydraulic excavator 1 of the embodiment is also configured as a cab-equipped hydraulic excavator 1.

[0014] The hydraulic excavator 1 comprises a self-propelled crawler-type lower traveling body 2, an upper rotating body 3 rotatably mounted on the lower traveling body 2, and a working device 4 provided on the upper rotating body 3. The lower traveling body 2 and the upper rotating body 3 constitute the vehicle body of the hydraulic excavator 1. The vehicle body is capable of traveling and rotating. A swing-type working device 4 is attached to the front side of the upper rotating body 3 so that it can swing. The hydraulic excavator 1 performs work such as excavating earth and sand using the working device 4.

[0015] The lower traveling body 2 is configured to include, for example, crawler tracks 2A each having a plurality of shoes attached to an endless track link, and left and right traveling hydraulic motors (not shown) that rotate the crawler tracks 2A to travel (self-propel) the hydraulic excavator 1. A swing device configured to include a swing bearing and a swing hydraulic motor is provided between the lower traveling body 2 and the upper rotating body 3.

[0016] The work device 4, also called a front device or work machine, has a swing post 4A mounted on the front side of a revolving frame 5 so that it can swing left and right. A boom 4B is rotatably attached to the swing post 4A, and an arm 4C is rotatably attached to the tip of the boom 4B, and a bucket 4D serving as a work tool is rotatably attached to the tip of the arm 4C. The work device 4 also has a swing cylinder (not shown) that swings the swing post 4A, a boom cylinder 4E that rotates the boom 4B, an arm cylinder 4F that rotates the arm 4C, and a bucket cylinder 4G serving as a work tool cylinder that rotates the bucket 4D.

[0017] The upper rotating body 3 is mounted on the lower traveling body 2 so as to be able to rotate. The upper rotating body 3 rotates on the lower traveling body 2 by being driven by a hydraulic motor for rotation of the rotation device. Here, the width dimension in the left-right direction of the upper rotating body 3 is set to be equal to the vehicle width of the lower traveling body 2. As a result, the hydraulic excavator 1 is configured as an ultra-tight rear swing hydraulic excavator in which, when the upper rotating body 3 rotates on the lower traveling body 2, the rear surface 12A of the counterweight 12 is within 120% of the vehicle width of the lower traveling body 2.

[0018] The upper rotating body 3 includes, for example, a rotating frame 5 as a vehicle body frame, a gas engine 13 (FIG. 2) that serves as the prime mover of the hydraulic excavator 1, and a cab box 9 having an operator's seat 7 (shown only in FIG. 1) inside. The operator's seat 7 and cab box 9 are provided on a floor member 8 (FIGS. 5 and 6) that is supported on the left front side of the rotating frame 5 so as to be tiltable around the front side of the floor member 8 as the tilt center. The floor member 8, the operator's seat 7, and the cab box 9 are provided on the left front side of the rotating frame 5. The cab box 9 is formed as a box that covers the periphery and the top of the operator's seat 7.

[0019] That is, the cab box 9 is formed in a box shape surrounded by a front 9A, a rear 9B, a left side 9C (FIG. 6), a right side 9D, and a top 9E, and the inside serves as an operator's cab. The right side 9D of the cab box 9 has a sliding driver's seat window 9D1 that can be opened and closed by moving it in the front-to-rear direction. As will be described later, by opening the driver's seat window 9D1, it is possible to perform the task of reconnecting the hose 43A connected to the cock 41B (42B) of one gas container 41 (42) from inside the cab box 9 to the cock 42B (41B) of the other gas container 42 (41).

[0020] Inside the cab box 9, there is provided a driver's seat 7 where the operator sits, and travel levers and pedals (not shown) and working levers (not shown) for operating the hydraulic excavator 1. By operating the travel levers and pedals and working levers, the operator can perform operations such as traveling using the lower traveling body 2, rotating the upper rotating body 3, and excavating using the working device 4.

[0021] The rotating frame 5 constitutes a support structure (base frame) for the upper rotating body 3. As shown in FIGS. 2 to 6, the rotating frame 5 includes a bottom plate 5A, a left vertical plate 5B (FIG. 6), a right vertical plate 5C, a horizontal plate 5D (FIGS. 5 and 7), an upper plate 5E, a left side frame 5F, and a right side frame 5G. The bottom plate 5A is formed using a thick steel plate and extends in the front-to-rear direction. The left vertical plate 5B and the right vertical plate 5C are erected on the bottom plate 5A and extend in the front-to-rear direction so that the left-to-right spacing between them increases from the front to the rear. The horizontal plate 5D is erected on the bottom plate 5A and extends in the left-to-right direction, connecting the left vertical plate 5B and the right vertical plate 5C. The upper plate 5E is provided on top of the left vertical plate 5B and the right vertical plate 5C and extends forward from the midpoint of the left vertical plate 5B and the right vertical plate 5C in the front-to-rear direction.

[0022] The left side frame 5F extends leftward from the front end of the bottom plate 5A, then bends and extends rearward. The right side frame 5G extends rightward from the front end of the bottom plate 5A, then bends and extends rearward. The front ends of the bottom plate 5A, left vertical plate 5B, right vertical plate 5C, and top plate 5E form a working device support portion 5H that protrudes forward. A swing post 4A of the working device 4 is attached to this working device support portion 5H so that it can swing left and right.

[0023] A left front beam 5J is provided at the front position of the revolving frame 5, extending laterally above the left side frame 5F. A floor member 8, to which a cab box 9 is attached, is supported by a tilt support member to be tiltable (tilt up, tilt down) on the left front beam 5J and upper plate 5E, which are located at the front position of the revolving frame 5. Also, as shown in FIG. 5, a gas container bracket 5K is provided above the right vertical plate 5C at the front position of the revolving frame 5. A gas container fixing device 21, which will be described later, is attached to the gas container bracket 5K. The gas container bracket 5K is adjacent to the right side surface 9D of the cab box 9 and is disposed to the side (right side in the left-right direction) of this right side surface 9D. As shown in FIGS. 6 and 7, the gas container fixing device 21 is fixed to the upper surface of the gas container bracket 5K.

[0024] In addition, a counterweight 12, a gas engine 13 (Fig. 2), a hydraulic pump (not shown), a hydraulic oil tank 15 (Fig. 1), and a control valve device (not shown) are mounted on the revolving frame 5. In this case, the working device 4 is attached to the front side of the revolving frame 5, and the counterweight 12 is attached to the rear side of the revolving frame 5. In addition, an exterior cover 16 (Fig. 1) is provided on the revolving frame 5 to cover the various devices mounted on the revolving frame 5.

[0025] The counterweight 12 is provided on the rear end side of the upper rotating body 3. That is, the counterweight 12 is provided at the rear end of the rotating frame 5, located rearward of the cab box 9, in order to balance the weight with the working implement 4. The counterweight 12 is formed as an arc-shaped heavy object that extends in the left-right direction, with the center in the left-right direction protruding rearward. As a result, the rear surface 12A of the counterweight 12 is formed as an arc-shaped surface that fits within an imaginary circle with a certain turning radius when the upper rotating body 3 turns. In addition, the rear end side of the floor member 8 is supported on the front side of the counterweight 12 in a manner that allows it to be attached and detached.

[0026] The gas engine 13 is mounted on the revolving frame 5, positioned in front of the counterweight 12. The gas engine 13 is supported via a plurality of mount members 13A (FIG. 2) on the rear side of the horizontal plate 5D of the revolving frame 5. The gas engine 13 is a prime mover that serves as the power source (driving source) of the hydraulic excavator 1. The gas engine 13 is driven by, for example, liquefied petroleum gas (LPG) as gas fuel. As shown in FIG. 2, the gas engine 13 is mounted on the revolving frame 5 in a horizontal position extending in the left-right direction.

[0027] The gas engine 13 is supplied with gas fuel from gas containers 41, 42, also called gas cylinders. That is, the gas containers 41, 42 are connected to the gas engine 13 via a fuel supply line 43. In this case, a hose 43A constituting the fuel supply line 43 is connected to a cock 41B of at least one of the two gas containers 41, 42, for example, the gas container 41 located at the front in the fore-and-aft direction of the upper rotating body 3. The gas containers 41, 42 are filled with liquid gas fuel. Although not shown, a vaporizer that vaporizes the gas fuel is provided in the fuel supply line 43 between the gas containers 41, 42 and the gas engine 13. The vaporizer is disposed, for example, at the rear end of the rotating frame 5.

[0028] Although not shown, a hydraulic pump is attached to the left side, which is one end of the gas engine 13. The hydraulic pump is driven by the gas engine 13. The hydraulic pump draws hydraulic oil stored in a hydraulic oil tank 15 and discharges (supplies) the pressurized oil toward a control valve device. The hydraulic pump supplies pressurized oil to various hydraulic actuators (hydraulic cylinders, hydraulic motors) such as the boom cylinder 4E via a control valve device. The control valve device is a control valve group consisting of multiple directional control valves. The control valve device distributes the pressurized oil discharged from the hydraulic pump to multiple hydraulic actuators (hydraulic cylinders, hydraulic motors) such as the boom cylinder 4E in response to the operation of the travel lever / pedal and the work lever. This allows the hydraulic excavator 1 to travel, swing, excavate, etc.

[0029] As shown in Figure 1, the hydraulic oil tank 15 is provided on the front right side of the revolving frame 5. The hydraulic oil tank 15 is located to the right of a gas container fixing device 21 (described later) and is disposed between the right vertical plate 5C and the right side frame 5G. The hydraulic oil tank 15 is, for example, a rectangular parallelepiped container extending in the vertical direction, and stores hydraulic oil to be supplied to various hydraulic actuators mounted on the hydraulic excavator 1.

[0030] The exterior cover 16 is located around the cab box 9 and is mounted on the revolving frame 5. The exterior cover 16 covers devices mounted on the revolving frame 5, such as a heat exchanger and a hydraulic oil tank 15. The exterior cover 16 includes a rear cover 16A that covers devices such as a heat exchanger mounted on the right side of the gas engine 13 and to the right of the right side 9D of the cab box 9, and a front cover 16B that is located forward of the rear cover 16A and covers devices such as the hydraulic oil tank 15. As shown in FIG. 1 , the gas containers 41 and 42 are exposed from the exterior cover 16. That is, the gas containers 41 and 42 are not covered by the exterior cover 16. The gas containers 41 and 42 are disposed in a substantially rectangular parallelepiped space (gas container mounting space) between the right side 9D of the cab box 9 and the front cover 16B of the exterior cover 16, and are exposed to the outside. Note that a gas container cover may be provided to cover the gas containers 41 and 42.

[0031] However, considering the standards for gas bottles currently in circulation, the rotating work vehicle of the aforementioned Patent Document 1 has a small fuel capacity for the gas bottle relative to the fuel consumption, resulting in a shorter total operating time compared to construction machinery with diesel engines that use light oil. Furthermore, gas bottles are heavy due to their structure. Therefore, considering that gas bottles will be manually loaded onto the construction machinery, it is preferable that the construction machinery be structured to facilitate the loading of gas bottles. Furthermore, because construction machinery is subject to large vibrations during operation, it is also necessary to provide a mechanism to secure the gas bottle to prevent it from flying out due to this vibration.

[0032] Therefore, in the embodiment, the vehicle body is configured to be able to mount multiple (e.g., two) gas containers and to allow easy replacement of the gas containers. Furthermore, the vehicle is configured to be able to prevent the gas containers from floating up regardless of vibrations during operation. These configurations will be described in detail below.

[0033] As shown in Fig. 1, a hydraulic excavator 1 serving as a construction machine includes a lower traveling body 2 and an upper rotating body 3 as a travelable vehicle body, and a working device 4 attached to the upper rotating body 3. A gas engine 13 is mounted on the upper rotating body 3. In addition, a gas container fixing device 21 is provided on the upper rotating body 3. That is, the upper rotating body 3 includes a rotating frame 5 as a vehicle frame to which the working device 4 is attached, and the gas engine 13 is mounted on this rotating frame 5. In addition, the gas container fixing device 21 is attached to the rotating frame 5.

[0034] Gas containers 41, 42 that store gas fuel for the gas engine 13 are supported (fixed) in a manner that allows them to be attached and detached to the gas container fixing device 21. The gas container fixing device 21 is capable of supporting a plurality of gas containers 41, 42, specifically, two gas containers 41, 42. This allows a plurality of gas containers (specifically, two) 41, 42 to be mounted on the upper rotating body 3. The two gas containers 41, 42, i.e., the first gas container 41 and the second gas container 42, are gas containers of the same standard (same shape, same structure).

[0035] Here, the gas containers 41, 42 are made of sealed containers that can be carried by hand, and store gas fuel such as LPG to be supplied to the gas engine 13. As shown in Figures 7 and 8, the gas containers 41, 42 are made up of sealed cylindrical container bodies 41A, 42A, cocks 41B, 42B provided at the center of one end side in the longitudinal direction of the container bodies 41A, 42A, a pair of semi-cylindrical protectors 41C, 42C provided on the container bodies 41A, 42A so as to surround the peripheries of the cocks 41B, 42B, and ring members 41D, 42D provided at the tips of the protectors 41C, 42C.

[0036] A hose 43A constituting the fuel supply line 43 is connected to the cocks 41B, 42B. That is, the cocks 41B, 42B are connected to the gas engine 13 via the fuel supply line 43 including the hose 43A. In this case, the hose 43A is connected to the cock 41B (42B) of one of the gas containers 41 (42) of the two gas containers 41, 42. The cocks 41B, 42B adjust the amount of gas fuel supplied to the gas engine 13. Openings 41E, 42E are formed at multiple locations around the circumferential direction of the protectors 41C, 42C, for example, at two locations facing each other in the radial direction across the cocks 41B, 42B. As a result, two locations of the ring members 41D, 42D corresponding to the openings 41E, 42E become handles 41F, 42F, and an operator carries the gas containers 41, 42 while holding the handles 41F, 42F.

[0037] Such gas containers 41, 42 are supported (fixed) by a gas container fixing device 21 provided on the left side of the cab box 9 at the front side of the upper rotating body 3. In this case, the upper rotating body 3 is provided with a first gas container mounting portion 22 on which the first gas container 41 is mounted, and a second gas container mounting portion 23 which is arranged inside (toward the back) of the upper rotating body 3 relative to the first gas container mounting portion 22 and on which a second gas container 42 separate from the first gas container 41 is mounted at a position higher than the first gas container 41 mounted on the first gas container mounting portion 22.

[0038] As a result, the second gas container 42 on the inner side (center side) of the upper rotating body 3, which is the far side of the upper rotating body 3, is mounted at a higher position than the first gas container 41 on the outer side (outer peripheral edge side) of the upper rotating body 3, which is the near side of the upper rotating body 3. That is, the first gas container mounting portion 22 and the second gas container mounting portion 23 are arranged in a stepped manner, that is, the inner second gas container mounting portion 23 is higher than the outer first gas container mounting portion 22. In other words, the outer first gas container mounting portion 22 is positioned lower than the inner second gas container mounting portion 23. Conversely, the inner second gas container mounting portion 23 is positioned higher than the outer first gas container mounting portion 22.

[0039] The first gas container mounting section 22 and the second gas container mounting section 23 are disposed to the side of the driver's seat 7 of the upper rotating body 3, more specifically, on the right side of the driver's seat 7. The first gas container mounting section 22 and the second gas container mounting section 23 have a first gas container 41 and a second gas container 42 mounted thereon in a vertical orientation. The first gas container mounting section 22 and the second gas container mounting section 23 are disposed side by side in the front-to-rear direction of the upper rotating body 3.

[0040] Furthermore, the first gas container 41 and the second gas container 42 are held down from above by a stopper member 33 (more specifically, a pair of holding members 34, 34 constituting the stopper member 33) while mounted on the first gas container mounting portion 22 and the second gas container mounting portion 23, respectively. In this case, the stopper member 33 is composed of a pair of plate-shaped holding members 34, 34 extending parallel to each other with a gap between them. As a result, the stopper member 33 is open at positions corresponding to a cock 41B serving as a hose connection portion for the first gas container 41 and a cock 42B serving as a hose connection portion for the second gas container 42.

[0041] That is, the upper rotating body 3 is provided with a fixing mechanism 31 that holds down the first gas container 41 and the second gas container 42 from above while the hose connection portion (cock 41B) of the first gas container 41 and the hose connection portion (cock 42B) of the second gas container 42 are open. The fixing mechanism 31 has stopper members 33 (holding members 34, 34) that abut against the upper portions of the first gas container 41 and the second gas container 42. The stopper member 33 (holding members 34, 34) has a base end 34A located inside the upper rotating body 3 (rear side, toward the rotation center) and a tip end 34B located outside the upper rotating body 3 (closer to the outer periphery) relative to the base end 34A. The tip end 34B of the stopper member 33 (holding members 34, 34) swings up and down around the base end 34A as the swing center.

[0042] The gas container fixing device 21 including the stopper member 33 (retaining members 34, 34) will be described in detail below.

[0043] The upper rotating body 3 is equipped with a gas container fixing device 21. In this case, the gas container fixing device 21 is attached to a gas container bracket 5K of the rotating frame 5. The gas container fixing device 21 supports a first gas container 41 and a second gas container 42 in a detachable manner. The gas container fixing device 21 has a main body 24, a raised bottom member 28, and a fixing mechanism 31. The main body 24 is configured as a cylindrical body (rectangular cylindrical body) with a rectangular cross section, and both ends in the longitudinal direction (front-rear direction) are open. The main body 24 includes a bottom plate 25, a pair of vertical plates 26, 26 rising from both sides in the width direction (left-right direction) of the bottom plate, and an upper plate 27 arranged parallel to the bottom plate 25 and connecting the pair of vertical plates 26, 26 at the upper ends of the pair of vertical plates 26, 26. The bottom plate 25 is fixed to the gas container bracket 5K of the rotating frame 5. The first gas container 41 is placed on the bottom plate 25. That is, the bottom plate 25 corresponds to the "bottom" that becomes the first gas container mounting portion 22.

[0044] Upper plate 27 is formed with first support hole 27A into which first gas container 41 is inserted and second support hole 27B into which second gas container 42 is inserted. Upper plate 27 corresponds to a "support portion" that is disposed above bottom plate 25, which serves as the "bottom portion," and mounting plate 30, which serves as the "raised bottom portion." Thus, main body 24 of gas container fixing device 21 is configured to include a "bottom portion" and a "support portion."

[0045] Meanwhile, the raised bottom member 28 is provided inside the main body 24. The raised bottom member 28 includes a pair of leg plates 29, 29 attached to the bottom plate 25 of the main body 24 and extending vertically along the vertical plates 26, 26, and a mounting plate 30 arranged parallel to the bottom plate 25 of the main body 24 and connecting the pair of leg plates 29, 29 at their upper ends. The mounting plate 30 is located below the upper plate 27, which serves as the "support portion," and above the bottom plate 25, which serves as the "bottom." The mounting plate 30 is raised above the bottom plate 25, which serves as the "bottom," and corresponds to the "raised bottom" that serves as the second gas container mounting portion 23.

[0046] The fixing mechanism 31 holds down the first gas container 41 and the second gas container 42 from above. That is, the fixing mechanism 31 holds down the first gas container 41 toward the bottom plate 25, and holds down the second gas container 42 toward the mounting plate 30. The fixing mechanism 31 includes a rising member 32, a pair of holding members 34, 34 constituting a stopper member 33, and a pair of connecting members 35, 35. The rising member 32 extends upward from the top plate 27 of the main body 24. The rising member 32 is configured as a substantially rectangular frame and includes a pair of mounting portions 32A, 32A attached to the top plate 27 of the main body 24, a pair of pillar portions 32B, 32B extending upward from the pair of mounting portions 32A, 32A, respectively, and a connecting portion 32C connecting the pair of pillar portions 32B, 32B at the upper ends of the pillar portions 32B, 32B. A stopper member 33 (holding members 34, 34) is attached to the connecting portion 32C via hinges 36, 36 so as to be able to swing.

[0047] The stopper member 33 holds down the first gas container 41 and the second gas container 42 from above. The stopper member 33 is composed of a pair of plate-shaped holding members 34, 34 extending parallel to each other with a gap between them. The base ends (base end 34A) of the holding members 34, 34 are cantilevered on the upper end of the rising member 32, with the base end 34A serving as the center of swing. In this case, the holding members 34, 34 are supported by the connecting portion 32C of the rising member 32 via a hinge 36. This allows the tip ends (tip end 34B) of the holding members 34, 34 to swing up and down above the first gas container 41 and the second gas container 42.

[0048] The holding members 34, 34 are formed as crank-shaped plates, in other words, plates having vertical steps. The holding members 34, 34 have a first holding portion 34C extending in the front-rear direction at a position corresponding to the upper side of the first gas container 41, a second holding portion 34D extending in the front-rear direction at a position corresponding to the upper side of the second gas container 42, and a step portion 34E connecting the first holding portion 34C and the second holding portion 34D. When the holding members 34, 34 are arranged above the first gas container 41 and the second gas container 42, the height position of the second holding portion 34D is higher than the height position of the first holding portion 34C.

[0049] Further, a tip end portion 34B on the tip side of the pressing members 34 is provided with an insertion hole 34F through which the upper end side (upper end portion 35B) of the connecting members 35 is inserted. Further, as shown in Figures 9 and 10, an elastic member 34G serving as a cushion member such as a rubber member is attached to the lower surface of the first pressing portion 34C (i.e., the surface facing the first gas container 41) and the lower surface of the second pressing portion 34D (i.e., the surface facing the second gas container 42).

[0050] The connecting members 35 are detachably attached to the tip ends (tip portions 34B) of the holding members 34 and the upper plate 27 of the main body 24. The connecting members 35 connect the tip ends of the holding members 34 to the upper plate 27. In this case, the connecting members 35 are configured as rod-shaped bodies having hook portions 35A that hook onto the upper plate 27 of the main body 24. That is, one end (lower end) of the connecting members 35 forms the hook portion 35A bent in a U-shape. On the other hand, the other end (upper end) of the connecting members 35, i.e., the upper end portion 35B opposite the hook portion 35A, is inserted into the insertion hole 34F on the tip end of the holding members 34 when the holding members 34 hold down the first gas container 41 and the second gas container 42. The upper end portions 35B of the connecting members 35, 35 are male threaded, and a nut 37 is screwed onto the upper end portions 35B while the first gas container 41 and the second gas container 42 are held down by the holding members 34, 34.

[0051] That is, when the first gas container 41 and the second gas container 42 are held down by the holding members 34, 34, the hook portions 35A of the connecting members 35, 35 are hooked onto the top plate 27 of the main body 24, and the upper ends 35B of the connecting members 35, 35 are inserted into the insertion holes 34F of the holding members 34, 34. In this state, the nuts 37 are screwed onto the upper ends 35B of the connecting members 35, 35. As a result, the first gas container 41 is sandwiched in the vertical direction between the bottom plate 25 of the main body 24 and the first holding portions 34C of the holding members 34, 34. Furthermore, the second gas container 42 is sandwiched in the vertical direction between the mounting plate 30 of the raised bottom member 28 and the second holding portions 34D of the holding members 34, 34.

[0052] As described above, in this embodiment, gas container fixing device 21, which serves as a gas container mounting portion, is provided adjacent to the right side of driver's seat 7. Main body 24 of gas container fixing device 21 is formed in a frame shape with a rectangular cross section, and is fixed onto revolving frame 5, more specifically onto gas container bracket 5K. In this state, gas container fixing device 21 is disposed extending in the front-to-rear direction of upper revolving body 3. Two gas containers 41, 42 are removably fixed onto gas container fixing device 21.

[0053] For example, as shown in FIG. 1 , consider a case where the hydraulic excavator 1 is operated with the hose 43A of the fuel supply line 43 connected to the cock 41B of the first gas container 41. In this case, the amount of gas fuel in the first gas container 41 becomes depleted or close to being depleted as the hydraulic excavator 1 operates. At this time, the operator can reattach the hose 43A from the cock 41B of the first gas container 41 to the cock 42B of the second gas container 42 without getting off the hydraulic excavator 1 as follows: That is, while remaining inside the cab box 9, the operator slides the driver's seat window 9D1 rearward to open the driver's seat window 9D1. Then, the operator reattaches the hose 43A, which is connected to the cock 41B of the first gas container 41, to the cock 42B of the second gas container 42 from inside the cab box 9 through the opened driver's seat window 9D1. This facilitates the reattachment operation.

[0054] Furthermore, when fixing the first gas container 41 and the second gas container 42 to the gas container fixing device 21, the first gas container 41 and the second gas container 42 are mounted inside the main body 24 of the gas container fixing device 21, and then the stopper member 33 (holding members 34, 34) is placed on top of the first gas container 41 and the second gas container 42. The holding members 34, 34 constituting the stopper member 33 are each connected to a hinge 36 by welding or the like, and are capable of rotating (swinging) around the hinge 36 as the center of rotation (swing center). The hinge 36 is attached to the connecting portion 32C of the rising member 32 with a bolt and nut. The rising member 32 is attached to the main body 24, which serves as the base of the gas container fixing device 21, with a bolt and nut.

[0055] An insertion hole 34F is provided at the tip 34B of the stopper member 33 (retaining members 34, 34). A connecting member 35, which serves as a fixing rod for the stopper member 33 (retaining members 34, 34), is inserted into this insertion hole 34F. The other end, or upper end 35B, of the connecting member 35, i.e., the tip of the connecting member 35, is male-threaded. By threading a nut 37 onto this male thread, the connecting member 35 is fixed between the stopper member 33 (retaining members 34, 34) and the main body 24 while holding the stopper member 33 (retaining members 34, 34) from the upper side (air side) to the lower side (ground side). In this case, the lower end, or the lower end of the connecting member 35, is a U-shaped hook portion 35A, which can be attached to and detached from the main body 24.

[0056] The first gas container 41 and the second gas container 42 are held down from above by the stopper member 33 (holding members 34, 34) by fixing the connecting member 35 between the stopper member 33 (holding members 34, 34) and the main body 24. This allows the first gas container 41 and the second gas container 42 to be fixed to the gas container fixing device 21, and prevents the first gas container 41 and the second gas container 42 from falling off due to vibrations during operation of the hydraulic excavator 1.

[0057] FIG. 4 shows a state in which the stopper member 33 (holding members 34, 34) is opened. The stopper member 33 (holding members 34, 34) is supported by the rising member 32 via the hinge 36, and can therefore rotate (swing) around the hinge 36 as the center of rotation (swing center). FIG. 8 shows a state in which the first gas container 41 and the second gas container 42 are mounted on the gas container fixing device 21 and are held down by the stopper member 33 (holding members 34, 34). FIG. 9 shows a state in which the stopper member 33 (holding members 34, 34) is opened and the first gas container 41 and the second gas container 42 are removed from the gas container fixing device 21.

[0058] An elastic member 34G is welded to the stopper member 33 (holding members 34, 34) at a position facing the first gas container 41 and the second gas container 42. The elastic member 34G elastically deforms when the stopper member 33 (holding members 34, 34) holds down the first gas container 41 and the second gas container 42 from above. This allows the elastic member 34G to function as a cushion. That is, the first gas container 41 and the second gas container 42 are held down by the stopper member 33 (holding members 34, 34) via the elastic member 34G. This prevents the first gas container 41 and the second gas container 42 from rattling, and allows the first gas container 41 and the second gas container 42 to be stably fixed to the gas container fixing device 21.

[0059] FIG. 10 is a perspective view of gas container fixing device 21 as viewed from the left side of FIG. 9. As shown in FIG. 10, raised bottom member 28 is provided inside main body 24 of gas container fixing device 21. Raised bottom member 28 is configured with a C-channel bracket. A second gas container 42 is placed on mounting plate 30, which forms the upper surface of raised bottom member 28. As a result, second gas container 42 located on the rear (inner) side of upper rotating body 3 is mounted at a higher position than first gas container 41 located on the outer periphery (front) side of upper rotating body 3. As a result, when replacing second gas container 42 located on the rear (center) side with a new gas container, the height to which second gas container 42 needs to be lifted is lower than in a configuration in which two gas containers are mounted at the same height. This facilitates the replacement work.

[0060] The hydraulic excavator 1 according to the embodiment has the above-described configuration, and its operation will now be described.

[0061] When the hydraulic excavator 1 is used to perform excavation work, the first gas cylinder 41 and the second gas cylinder 42 are mounted on the gas cylinder fixing device 21, and a hose 43A is connected to the cock 41B (42B) of one of the gas cylinders 41 (42). In this state, the operator sits in the cab box 9 and starts the gas engine 13. When the operator operates the travel lever and pedal, pressurized oil is supplied from the hydraulic pump via a control valve device to the travel hydraulic motor of the undercarriage 2. This allows the hydraulic excavator 1 to travel. When the operator operates the work lever, pressurized oil is supplied from the hydraulic pump via a control valve device to the swing hydraulic motor, swing cylinder, boom cylinder 4E, arm cylinder 4F, and bucket cylinder 4G. This allows the upper rotating body 3 to be rotated while the work device 4 is used to perform excavation work on earth and sand.

[0062] Here, for example, when the gas fuel in one gas container 41 (42) is used up, the hose 43A is reattached from the cock 41B (42B) of one gas container 41 (42) to the cock 42B (41B) of the other gas container 42 (41). At this time, the reattachment work can be performed from inside the cab box 9 by opening the driver's seat window 9D1 of the cab box 9.

[0063] Furthermore, for example, when replacing the second gas container 42 with a new gas container to replenish the gas fuel, the connecting members 35, 35 that connect the stopper member 33 (retaining members 34, 34) of the gas container fixing device 21 to the main body 24 are removed. That is, the nut 37 that is threaded onto the upper end portion 35B of the connecting members 35, 35 is removed from the connecting members 35, 35. Then, the hook portion 35A of the connecting members 35, 35 is removed from the upper plate 27 of the main body 24, and the upper end portion 35B of the connecting members 35, 35 is pulled out from the insertion hole 34F of the stopper member 33 (retaining members 34, 34).

[0064] Next, as shown in FIGS. 4 and 9 , the stopper member 33 (the holding members 34, 34) is rotated toward the rear (inner side, rear side) of the upper rotating body 3. In this state, the second gas container 42 is removed from the gas container fixing device 21. At this time, the second gas container 42 is placed on the second gas container mounting portion 23, i.e., the mounting plate 30 of the raised bottom member 28, and is positioned higher than the first gas container 41 placed on the first gas container mounting portion 22. This makes it easier to remove the second gas container 42 from the gas container fixing device 21. Then, after a new gas container is placed on the gas container fixing device 21 as the new second gas container 42, the stopper member 33 (the holding members 34, 34) is rotated to a position above the first gas container 41 and the second gas container 42. In this state, the stopper member 33 (the holding members 34, 34) and the main body 24 are connected by the connecting members 35, 35.

[0065] According to the embodiment, the vehicle includes a first gas container mounting section 22 on which a first gas container 41 is mounted, and a second gas container mounting section 23 on which a second gas container 42 separate from the first gas container 41 is mounted. Therefore, even if the gas fuel in one of the first gas container 41 and the second gas container 42 is used up, operation can continue using the gas fuel in the other gas container 42. This extends the total operating time until the gas containers 41, 42 need to be replaced. Furthermore, the second gas container mounting section 23, which is located closer to the inside of the upper rotating body 3 (which serves as the vehicle body) than the first gas container mounting section 22, mounts the second gas container 42 at a higher position than the first gas container 41 mounted on the first gas container mounting section 22. Therefore, not only can the first gas container 41 on the outside (front side, outer edge side) of the upper rotating body 3 be easily replaced, but also the second gas container 42 on the inside (center side, rear side) of the upper rotating body 3 can be easily replaced, thereby improving the mountability of heavy gas containers 41, 42.

[0066] According to the embodiment, the first gas container 41 and the second gas container 42 are mounted vertically on the first gas container mounting portion 22 and the second gas container mounting portion 23, respectively, which are arranged to the side (left side) of the driver's seat 7 of the upper rotating body 3. Therefore, when the fuel supply line 43 (hose 43A) connected to the gas engine 13 is replaced from the cock 41B (42B) of one vertically placed gas container 41 (42) to the cock 42B (41B) of the other vertically placed gas container 42 (41), this replacement work can be performed near the driver's seat 7. This makes it easy to replace the fuel supply line 43 (hose 43A).

[0067] According to the embodiment, the first gas container mounting section 22 and the second gas container mounting section 23 are arranged side by side in the fore-and-aft direction of the upper rotating body 3. This makes it possible to easily replace not only the first gas container 41 on the front side, which is in front of the upper rotating body 3, but also the second gas container 42 on the rear side, which is inside the upper rotating body 3. Furthermore, because the first gas container 41 and the second gas container 42 are lined up side by side (on the left side) of the driver's seat 7 of the upper rotating body 3, the work of replacing the fuel supply line 43 (hose 43A) can be easily performed near the driver's seat 7.

[0068] According to the embodiment, the first gas container 41 and the second gas container 42 are held down from above by the fixing mechanism 31. Therefore, regardless of vibrations during operation of the hydraulic excavator 1, the fixing mechanism 31 can prevent the first gas container 41 and the second gas container 42 from floating up. Moreover, the fixing mechanism 31 is open at positions corresponding to the hose connection portion (cock 41B) of the first gas container 41 and the hose connection portion (cock 42B) of the second gas container 42. Specifically, the stopper member 33 (holding members 34, 34) of the fixing mechanism 31 is open at positions corresponding to the hose connection portion (cock 41B) of the first gas container 41 and the hose connection portion (cock 42B) of the second gas container 42. Therefore, the fuel supply line 43 (hose 43A) can be replaced while the first gas container 41 and the second gas container 42 are held down from above by the fixing mechanism 31 (stopper member 33), that is, without removing the fixing mechanism 31 (stopper member 33) from the first gas container 41 and the second gas container 42. Therefore, from this perspective, the fuel supply line 43 (hose 43A) can be easily replaced.

[0069] According to the embodiment, the first gas container 41 and the second gas container 42 are held down from above by the stopper member 33 (holding members 34, 34), whose tip end 34B swings up and down around the base end 34A as a swing center. In this case, the stopper member 33 (holding members 34, 34) swings up and down around the base end 34A, which is located inside (the back side, the center side) of the upper rotating body 3, and whose tip end 34B, which is located outside (the outer peripheral edge side) of the upper rotating body 3. Therefore, by swinging the stopper member 33 (holding members 34, 34) up and down, the first gas container 41 and the second gas container 42 can be easily held down and released by the stopper member 33 (holding members 34, 34). This also facilitates the replacement of the first gas container 41 and the second gas container 42 with new containers (containers filled with gas fuel).

[0070] According to the embodiment, the first gas container 41 and the second gas container 42 are removably supported by the gas container fixing device 21. In this case, the second gas container 42 is mounted at a higher position than the first gas container 41 by the mounting plate 30 serving as a raised bottom portion that is raised higher than the bottom plate 25 serving as the bottom portion on which the first gas container 41 is mounted. This improves the mountability of both the first gas container 41 on the outside (front side) of the upper rotating body 3 and the second gas container 42 on the inside (rear side) of the upper rotating body 3. Moreover, the first gas container 41 and the second gas container 42 are inserted into the first support hole 27A and the second support hole 27B, respectively, of the upper plate 27, which serves as a support portion. Therefore, the first gas container 41 and the second gas container 42 can be stably supported by the upper plate 27. Furthermore, the first gas container 41 and the second gas container 42 are held down from above by the fixing mechanism 31. Therefore, regardless of vibrations occurring when the hydraulic excavator 1 is in operation, the fixing mechanism 31 can prevent the first gas container 41 and the second gas container 42 from rising up.

[0071] According to the embodiment, the fixing mechanism 31 includes the rising member 32, the holding members 34, 34 constituting the stopper member 33, and the connecting members 35, 35. Therefore, by attaching the connecting members 35 to the holding members 34, 34 and the upper plate 27 while the first gas container 41 and the second gas container 42 are held down from above by the holding members 34, 34, the first gas container 41 and the second gas container 42 can be stably held down. Furthermore, by removing the connecting members 35, 35 from the holding members 34, 34 and the upper plate 27 and swinging the holding members 34, 34 upward around the upper end side of the rising member 32 as the swing center, the first gas container 41 and the second gas container 42 can be easily released from being held down. Therefore, the first gas container 41 and the second gas container 42 can be easily replaced.

[0072] In the embodiment, an example has been described in which both of the two gas containers 41, 42 are mounted vertically on the upper rotating body 3. However, the present invention is not limited to this, and for example, either one or both of the two gas containers may be mounted horizontally on the vehicle body.

[0073] In the embodiment, an example has been described in which two gas containers 41, 42 are mounted on the upper rotating body 3 as the vehicle body. However, this is not limiting, and for example, three or more gas containers may be mounted on the vehicle body. In this case, a gas container mounting section located more inwardly of one of the plurality of gas container mounting sections in the vehicle body is a second gas container mounting section, and a gas container mounting section located more outwardly of the vehicle body than the second gas container mounting section (for example, toward the outer periphery of the upper rotating body) is a first gas container mounting section. The second gas container mounting section mounts a gas container at a higher position than the gas container mounted on the first gas container mounting section. For example, the plurality of gas container mounting sections are arranged in a stepped pattern so that the positions are higher as they move toward the inside of the vehicle body.

[0074] In the embodiment, an example has been described in which gas container fixing device 21 is fixed to revolving frame 5, which is the body frame. However, this is not limiting, and for example, the gas container fixing device may be fixed to a floor member supported on the body frame via an elastic member. That is, the gas container mounting portion may be on the body frame, or may be on a portion other than the body frame, for example, a floor member supported on the body frame via an elastic member. Furthermore, the gas container mounting portion may be a member (gas container fixing device) attached to the body frame or floor member.

[0075] In the embodiment, an example has been described in which the first gas container mounting section 22 and the second gas container mounting section 23 are disposed on the sides of the driver's seat 7 of the upper rotating body 3. However, this is not limiting, and for example, the first gas container mounting section and the second gas container mounting section may be disposed at a position away from the driver's seat.

[0076] In the embodiment, the first gas container mounting portion 22 and the second gas container mounting portion 23 are adjacent (adjacent) to the driver's seat 7, and in addition, the first gas container mounting portion 22 and the second gas container mounting portion 23 are also adjacent (adjacent) to the driver's seat 7. However, this is not limiting, and for example, the first gas container mounting portion and the second gas container mounting portion may be disposed apart from each other. Also, one of the first gas container mounting portion and the second gas container mounting portion may be disposed adjacent to the driver's seat, and the other may be disposed apart from the driver's seat. Furthermore, both the first gas container mounting portion and the second gas container mounting portion may be disposed apart from each other.

[0077] In the embodiment, an example has been described in which gas container fixing device 21 is provided on the front side of upper rotating body 3. However, this is not limiting, and the gas container fixing device may be, for example, on the rear, left side, or right side of the vehicle body. That is, the gas container mounting portion may be on the front, rear, or side (left or right) of the vehicle body. In either case, the gas container mounting portion located on the inside of the vehicle body is the second gas container mounting portion, and the gas container mounting portion located on the outside of the vehicle body (for example, toward the outer periphery of the upper rotating body) is the first gas container mounting portion. The second gas container mounting portion mounts the gas container at a higher position than the gas container mounted on the first gas container mounting portion.

[0078] In the embodiment, an example has been described in which one gas container fixing device 21 supports multiple (specifically, two) gas containers 41, 42. However, the present invention is not limited to this, and for example, one gas container fixing device may support one gas container, and multiple gas container fixing devices may be provided on the vehicle body.

[0079] In the embodiment, the stopper member 33 is described as being composed of a pair of holding members 34, 34. However, the present invention is not limited to this, and the stopper member may be composed of a single holding member, for example. In this case, the stopper member (holding member) may have an opening at a position corresponding to the hose connection portion of the gas container. Also, the number of connecting members may be one.

[0080] In the embodiment, the hydraulic excavator 1 equipped with a swing-type working implement 4 has been described as an example. However, the present invention is not limited to this, and can also be applied to hydraulic excavators equipped with other types of working implements (front implements), such as hydraulic excavators equipped with a mono-boom working implement or a hydraulic excavator equipped with an offset-type working implement. Furthermore, although the working implement 4 has been described as a bucket 4D as an example, a working implement equipped with another working implement, such as a crusher, may also be used.

[0081] In the embodiment, the hydraulic excavator 1 has been described as a cab-type excavator equipped with a cab box 9. However, the present invention is not limited to this, and for example, a canopy-type hydraulic excavator may also be used.

[0082] In the embodiment, a small hydraulic excavator 1 has been described as an example, but the present invention may also be applied to, for example, medium-sized or larger hydraulic excavators. Also, although the example has been described in which the vehicle body is configured with a lower traveling body 2 and an upper rotating body 3, the vehicle body may not have a rotating body (for example, an articulated vehicle body in which a front vehicle body having front wheels and a rear vehicle body having rear wheels are flexibly connected via a connecting shaft).

[0083] In the embodiment, the hydraulic excavator 1 has been described as an example of construction machinery, but the present invention is not limited to this and can be widely applied to various types of construction machinery such as wheel loaders. [Explanation of symbols]

[0084] 1. Hydraulic excavator (construction machinery) 2 Undercarriage (car body) 3 Upper rotating body (car body) 4 Work equipment 7 Driver's seat 13 Gas Engine 21 Gas bottle fixing device 22 First gas container mounting section 23 Second gas container mounting section 25 Bottom plate (bottom) 27 Upper plate (support part) 27A 1st support hole 27B 2nd support hole 30 Placement plate (raised bottom) 31 Fixing mechanism 32 Rising member 33 Stopper member 34 Retaining member 34A Base end (base end side) 34B Tip (tip side) 35 Connecting member 41 First Gas Cylinder 41B Cock (hose connection part) 42 Second gas container 42B Cock (hose connection)

Claims

1. A vehicle equipped with a gas engine, A construction machine equipped with a working device attached to the vehicle body, The vehicle body is a bottom portion serving as a first gas container mounting portion on which a first gas container for storing gas fuel for the gas engine is mounted; a raised bottom portion that is disposed more inwardly of the vehicle body than the bottom portion and is raised to serve as a second gas container mounting portion on which a second gas container different from the first gas container is mounted at a position higher than the first gas container mounted on the first gas container mounting portion; a support portion having a first support hole into which the first gas container is inserted and a second support hole into which the second gas container is inserted, the support portion being disposed above the bottom portion and the raised bottom portion; a fixing mechanism that holds the first gas container and the second gas container from above; a gas container fixing device having The fixing mechanism includes: a rising member extending upward from the support portion; a holding member whose base end side is cantilevered on the upper end side of the rising member as a swing center and whose tip end side is swingable up and down above the first gas container and the second gas container; a connecting member that is detachably attached to the tip end side of the pressing member and the support portion, and that connects the tip end side of the pressing member and the support portion; A construction machine characterized by comprising:

2. the first gas container mounting portion and the second gas container mounting portion are disposed on either side of a driver's seat of the vehicle body, 2. The construction machine according to claim 1, wherein the first gas container and the second gas container are mounted vertically on the first gas container mounting portion and the second gas container mounting portion.

3. 3. The construction machine according to claim 2, wherein the first gas container mounting portion and the second gas container mounting portion are arranged side by side in the front-to-rear direction of the vehicle body.

4. 3. The construction machine according to claim 2, further comprising the fixing mechanism that holds down the first gas container and the second gas container from above while the hose connection portion of the first gas container and the hose connection portion of the second gas container are open.

Images