JP2024031601A - construction machinery - Google Patents

Abstract

The present invention provides a construction machine in which replaceable internal components are housed in a casing, in which the internal components can be easily installed at desired positions. A construction machine (10) includes a lower traveling body (1), a revolving frame (3), a counterweight (7), and a removable fuel tank unit (51) housed in a casing (20). The casing 20 has a main body 21 that houses the fuel tank unit 51 and has an opening 8 formed in the upper surface through which the fuel tank unit 51 can be taken in and taken out. The construction machine 10 is provided at a position in contact with the outer shape of the fuel tank unit 51 at a predetermined installation position in a plan view, extends in the vertical direction, and has a guiding section that allows the fuel tank unit 51 to slide in the vertical direction. A member 70 is provided. The positioning member 70 has an outer portion 71 located above the main body portion 21 . [Selection diagram] Figure 8

Description

The present invention relates to construction machinery.

Construction machines such as cranes and hydraulic excavators require more power than cars, so they are equipped with large fuel tanks, batteries, etc. that can store enough fuel and electricity. In addition, in preparation for situations where supply equipment for replenishing fuel and electricity is not available at the construction site or is difficult to arrange, the fuel tank and battery may be configured as replaceable cartridges.

The following Patent Document 1 proposes a construction machine that has a replaceable battery that enables power supply without installing battery charging equipment at the work site (for example, the following Patent Document 1).

In the construction machine described in Patent Document 1, the battery housing containing the used battery is lifted and removed by a crane, and the battery housing containing the charged battery is installed using a crane or the like, so that it can be moved to the work site. This makes it possible to replenish electricity without installing battery charging equipment.

Japanese Patent Application Publication No. 2008-69517

However, in the construction machine described in Patent Document 1, the battery housing is housed in a machine room and covered with a casing together with other mounted items. Therefore, when installing the battery case, it is necessary to lower the battery case lifted by a crane without being able to visually see the installation position, which may cause the installation position to shift and cause collisions with the aircraft or other components. Doing so may damage them.

The present invention has been made in view of the above, and an object of the present invention is to enable easy installation of the payload at a desired position in a construction machine in which the payload is housed in a casing. It is in.

In order to achieve the above purpose, a construction machine in which a replaceable payload is housed in a casing has an outer part located above the main body of the casing and comes into contact with the payload when the payload is installed. Therefore, we decided to provide a positioning member that guides the loaded object to a predetermined installation position within the casing.

Specifically, a first invention provides an undercarriage, a swing frame rotatably provided on the undercarriage, a rear part mounted on a rear part of the swing frame, and a swing frame. A construction machine comprising a removable internal load stored in a casing provided on the front side of the rear load, wherein the casing has an opening formed on the top surface through which the internal load can be taken in and taken out. It has a main body part that stores the internally loaded object, and is provided at a position in contact with the outer shape of the internally loaded object at a predetermined installation position in a plan view, and extends in the vertical direction, The device includes a positioning member having a guide portion that allows sliding, and the positioning member has an outer portion located above the main body portion.

In the first invention, a positioning member is provided that guides the loaded object to a predetermined installation position by coming into contact with the loaded object when installing the loaded object. In addition, the positioning member has a guiding part that extends in the vertical direction and allows vertical sliding of the internally loaded object, and the guiding part is located at a position that contacts the outer shape of the internally loaded object at a predetermined installation position in a plan view. It is set in. Further, the positioning member has an outer portion located above the main body portion. Therefore, by using a crane or the like to move the internally loaded object toward the outer part of the positioning member that can be seen from a distance, and by bringing the internally loaded object into contact with the guiding part of the positioning member, the internally loaded object can be easily positioned. It can be placed (positioned) at a position above the installation position of. If the internally mounted object is slid onto the guiding section and lowered at the position where the internally mounted object is brought into contact with the guiding section, the internally mounted object can be easily installed at a predetermined installation position. In other words, according to the first invention, by providing the positioning member, the internally loaded object can be easily positioned above the predetermined installation position, and the internally loaded object collides with the aircraft body or other component equipment. It can be easily installed in the desired position without causing any damage.

A second aspect of the present invention is that in the first aspect, at least an upper end of the outer portion is located above an upper end of the rear mounted object.

In the second invention, at least the upper end of the outer portion of the positioning member is located above the upper end of the rear mounted object, so that even when a worker operating a crane or the like is on the rear side of the construction machine, However, at least the upper end of the outer portion of the positioning member can be visually recognized. Therefore, even if the rear mounted object is bulky, the internal mounted object can be easily placed above the predetermined installation position.

A third invention is based on the first invention, wherein the internally mounted object has a recess extending in the vertical direction, and the guide section is a convex section extending in the vertical direction that fits into the recess of the internally mounted object. and the internally loaded object is guided to the predetermined installation position by lowering the internally loaded object from above the opening with the convex portion fitted into the recessed portion of the internally loaded object. It is characterized by:

In the third invention, a concave portion extending in the vertical direction is formed in the internally loaded object, and the guiding portion of the positioning member is configured with a convex portion extending in the vertical direction that fits into the concave portion of the internally loaded object. ) is fitted into the recess of the internally loaded object and the internally loaded object is lowered to guide the internally loaded object to a predetermined installation position. With such a configuration, when lowering the internally loaded object, displacement of the internally loaded object in the horizontal direction is restricted. Therefore, according to the third invention, it is possible to easily install the internally loaded items at a desired position without colliding with other parts or the aircraft body and damaging them.

A fourth invention is based on the first invention, wherein the internally mounted object has a convex portion extending in the vertical direction, and the guiding portion is a recessed portion extending in the vertical direction into which the convex portion of the internally mounted object fits. The internal load is guided to the predetermined installation position by lowering the internal load from above the opening with the convex portion of the internal load fitted into the recess. It is characterized by this.

In the fourth invention, a convex portion extending in the vertical direction is formed on the internally loaded object, and the guiding portion of the positioning member is configured with a concave portion extending in the vertical direction into which the convex portion of the internally loaded object fits, and the convex portion of the internally loaded object is formed. By lowering the internally loaded object with the part fitted into the guiding part (recess), the internally loaded object is guided to a predetermined installation position. With such a configuration, when lowering the internally loaded object, displacement of the internally loaded object in the horizontal direction is restricted. Therefore, according to the fourth invention, the internally loaded items can be easily installed at a desired position without colliding with other parts or the aircraft body and damaging them.

A fifth invention is characterized in that in the third invention, the lower end portion of the recessed portion is configured as a lower widening portion that becomes wider from the upper side toward the lower side.

In the fifth aspect of the invention, the lower end of the recess formed in the internally mounted object is formed into a lower widening portion that becomes wider from the upper side toward the lower side. With this configuration, when aligning the internal load so that the recess of the internal load lifted by a crane or the like above the opening corresponds to the convex part (guiding part) of the positioning member, the lower end of the recess Since the width of the recess is wide, even if the position of the internally mounted object is slightly shifted in the width direction of the recess, the lower end of the recess can be fitted into the projection of the positioning member. Then, when the internal load is lowered with the convex portion of the positioning member fitted into the recess, the position of the internal load is corrected. Therefore, according to the fifth invention, it is possible to more easily install the internally mounted object at a desired position.

A sixth invention is based on the fourth invention, characterized in that the upper end of the recess is configured as an upper widening part that becomes wider from the lower side toward the upper side.

In the sixth invention, the upper end portion of the recess (guiding portion) of the positioning member is formed into an upper widening portion that becomes wider from the lower side toward the upper side. With this configuration, when aligning the internal load so that the concave portion corresponds to the convex portion above the positioning member, the width of the upper end of the concave portion is wide, making it easy to align the concave portion and the convex portion. It becomes easier to fit the convex parts. Therefore, according to the sixth invention, it is possible to more easily install the internally mounted object at a desired position.

A seventh invention is characterized in that, in any one of the first to sixth inventions, a plurality of the positioning members are provided.

In the seventh invention, since a plurality of positioning members are provided, the internally loaded object can be brought into contact with the guide portions of the plurality of positioning members and lowered. Therefore, when installing an internal load, the internal load suspended by a crane or the like is rotated in a horizontal plane and brought into contact with the guiding parts of multiple positioning members, so that the internal load can be moved above the predetermined installation position. It can be arranged (positioned) in a desired direction at a position. In addition, by lowering the internally loaded items while sliding them on the guiding parts of multiple positioning members, the internally loaded items can be lowered in the desired orientation, causing the internally loaded items to collide with other parts or the aircraft. It can be easily installed in the desired position without causing any damage.

In an eighth aspect of the present invention, in any one of the first to sixth aspects, the positioning member has an inner portion that extends downward continuously from a lower end of the outer portion, and the guide portion is arranged in the outer portion. It is characterized by being formed so as to extend from the inner portion to the inner portion.

In the eighth invention, when installing an internally loaded object, the internally loaded object is not only placed above the opening, but is also moved into the casing main body from above the opening until it reaches a predetermined installation position. It can be lowered while remaining in contact with the guiding part. In other words, according to the eighth invention, the internally loaded object can be lowered along a desired route from above the opening to a predetermined installation position inside the main body portion without being displaced. Therefore, according to the eighth invention, not only when the internally loaded object is above the main body, but also after it has entered the interior, the internally loaded object can be lowered while remaining in contact with the guiding part. It is possible to accurately place the internally loaded items at a desired position within the main body of the casing without colliding with and damaging other parts or the aircraft body.

In a ninth invention, in any one of the first to sixth inventions, the positioning member has an upper position in which the outer portion is located above the main body portion, and an upper position in which the outer portion is located above the main body portion. It is characterized in that it is configured to be movable between a lower position and a lower position where it is not located.

In the ninth invention, by configuring the positioning member to be movable between an upper position and a lower position, the outer part of the positioning member is positioned above the main body only when necessary (when installing an internal load). This can be used as a mark when installing internally mounted items, and when a mark is not needed, unnecessary protrusions can be eliminated by housing the outer part inside the main body. In addition, when positioning the positioning member at a height that can be seen from a distance, it is only necessary to move the positioning member to the upper position, and there is no need to make the positioning member long in the vertical direction. .

In a tenth invention, in any one of the first to sixth inventions, a second positioning member extending in the vertical direction is provided at a position opposite to the positioning member across the opening of the main body, The second positioning member is characterized in that at least the upper end portion thereof is formed into an inclined portion that is inclined with respect to the vertical direction so as to move away from the opening from the lower side to the upper side. .

In the tenth aspect of the present invention, the inclined portion is formed at a position opposite to the positioning member across the opening of the main body portion, and is inclined with respect to the vertical direction so that at least the upper end portion thereof is further away from the opening from the lower side to the upper side. A second positioning member is provided. Therefore, even if the internal load lifted by a crane or the like is placed closer to the second positioning member than the desired position above the opening, when the internal load is lowered, the internal load will be moved to the second positioning member. By coming into contact with the inclined portion of the positioning member No. 2, the position of the internally loaded object is corrected to the positioning member side. Therefore, according to the tenth invention, the internal load can be lowered smoothly even if the internal load is not precisely aligned above the opening.

As explained above, according to the present invention, a construction machine in which a replaceable payload is stored in a casing has an outer portion located above the main body of the casing, and when the payload is installed, the construction machine has an outer portion located above the main body of the casing. Since a positioning member is provided that guides the loaded object to a predetermined installation position within the casing by abutting the positioning member, it is possible to provide a construction machine in which the internal loaded object can be easily installed at a desired position.

FIG. 1 is a side view showing the overall configuration of a construction machine according to a first embodiment. FIG. 2 is a perspective view showing an outline of the equipment arrangement of the upper revolving body of the construction machine according to the first embodiment. FIG. 3 is a perspective view showing a state in which the casing of the machine room in FIG. 2 is removed. FIG. 4 is a plan view corresponding to FIG. 3. FIG. 5 is a drive system diagram of the construction machine according to the first embodiment. FIG. 6 is an explanatory diagram showing a procedure for removing a used fuel tank unit. FIG. 7 is an explanatory diagram showing a procedure for installing a filled fuel tank unit. FIG. 8 is an enlarged perspective view showing the vicinity of the positioning member when the unit is installed. FIG. 9 is an enlarged perspective view showing the vicinity of the positioning member of the construction machine according to the second embodiment. FIG. 10 is an enlarged cross-sectional view of the positioning member of the construction machine according to the first modification of the second embodiment. FIG. 11 is an enlarged perspective view showing the vicinity of the positioning member of the construction machine according to the third embodiment. FIG. 12 is an enlarged perspective view showing the vicinity of the positioning member of the construction machine according to the fourth embodiment. FIG. 13 is an enlarged perspective view showing the vicinity of the positioning member of the construction machine according to the fifth embodiment. FIG. 14 is an enlarged perspective view showing the vicinity of the positioning member of the construction machine according to the sixth embodiment. FIG. 15 is a side view showing a schematic configuration of a construction machine according to a seventh embodiment. FIG. 16 is an enlarged perspective view showing the vicinity of the second positioning member of the construction machine according to the seventh embodiment. FIG. 17 is a longitudinal sectional view showing a schematic configuration of a positioning member configured separately from a guard frame of a construction machine according to another embodiment. FIG. 18 is an operational diagram of a positioning member configured to be able to move up and down in a construction machine according to another embodiment.

Embodiments of the present invention will be described below based on the drawings. Note that the following description of preferred embodiments is essentially just an example, and is not intended to limit the present invention, its applications, or its uses.

《Embodiment 1 of the invention》
As shown in FIG. 1, in Embodiment 1, a hydraulic excavator will be described as an example of a construction machine 10 according to the present invention. In the following description, as shown in FIGS. 1 to 4, the front-back, left-right, and up-down directions of the construction machine 10 will be referred to as front-back, left-right, and up-down directions, respectively.

As shown in FIG. 1, the construction machine 10 includes a crawler-type lower traveling body 1 and an upper revolving body 2 rotatably mounted on the lower traveling body 1.

The lower traveling body 1 has a crawler mechanism 11 having a travel hydraulic motor 11a and crawlers 11b driven by the travel hydraulic motor 11a on the left and right sides. When the travel hydraulic motors 11a of the left and right crawlers 11b are rotated in the same direction, the construction machine 10 moves forward or backward, and when the travel hydraulic motors 11a of the left and right crawlers 11b are rotated in opposite directions or only one of them is rotated, the construction machine 10 moves forward or backward. Machine 10 rotates. Further, the lower traveling body 1 has a swing bearing 12 approximately in the center of the upper part of the crawler mechanism 11, which supports the upper rotating structure 2 so as to be rotatable. Note that the upper rotating body 2 rotates with respect to the lower traveling body 1 when a hydraulic swing motor 45 of a hydraulic circuit 40 (described later) receives hydraulic oil from a hydraulic pump 41.

The traveling hydraulic motor 11a of the lower traveling body 1 is connected via a hydraulic pipe 14 to a control valve 43 of a hydraulic circuit 40 provided in the upper rotating body 2, which will be described later. They are connected via a swivel joint 13 to prevent twisting. The swivel joint 13 is provided approximately at the center of the swing bearing 12 (swivel center).

The upper revolving body 2 includes a revolving frame 3, an attachment 4 that is movably attached to the front end of the revolving frame 3 and performs excavation work of earth and sand, a cab 5, a machine room 6, and a counterweight 7. We are prepared.

As shown in FIGS. 2 to 4, the revolving frame 3 is a platform-shaped support member that constitutes the bottom surface of the upper revolving structure 2. As shown in FIGS. A pair of vertical plates 3a, 3a are erected midway in the left-right direction of the rotating frame 3. The pair of vertical plates 3a, 3a are arranged parallel to each other with an interval left and right, and are fixed on the rotating frame 3. The pair of vertical plates 3a, 3a are formed to have a length extending from the front end to the rear end of the rotating frame 3. By providing such a pair of vertical plates 3a, 3a in the middle in the left-right direction, the rigidity of the swing frame 3 is increased. A base end portion of an attachment 4 is swingably attached to the front end portions of the pair of vertical plates 3a, 3a.

As shown in FIG. 1, the attachment 4 includes a boom 4a, an arm 4b, a bucket 4c, and hydraulic cylinders 4d to 4f. The boom 4a has its base end swingably attached to the front ends of a pair of vertical plates 3a, 3a, and is connected to the pair of vertical plates according to the expansion and contraction of a hydraulic cylinder 4d, which is supplied with hydraulic oil from a hydraulic pump 41 and expands and contracts. 3a, swings relative to 3a. The arm 4b has its base end swingably attached to the tip of the boom 4a, and swings relative to the boom 4a in accordance with the expansion and contraction of the hydraulic cylinder 4e, which is supplied with hydraulic oil from the hydraulic pump 41 and expands and contracts. The bucket 4c is swingably attached to the tip of the arm 4b, and swings relative to the arm 4b in accordance with the expansion and contraction of the hydraulic cylinder 4f, which is supplied with hydraulic oil from the hydraulic pump 41 and expands and contracts. Note that the configuration of the attachment 4 is not limited to this.

The cab 5 is a box-shaped operator's cabin equipped with a driver's seat, various control devices, operating devices, and the like. As shown in FIG. 4, the cab 5 is disposed on the front left side of the swing frame 3 so as to be adjacent to the left side of the attachment 4.

The machine room 6 has a power generation equipment room 6A and a hydraulic equipment room 6B. The power generation equipment room 6A includes a rear part 6A1 which is the rear part of the revolving frame 3 and extends from the left end to the right end immediately before the counterweight 7, and a front part 6A2 which projects from the rear to the front between the rear part and the cab 5. It has a substantially L-shape in plan view. The hydraulic equipment chamber 6B is continuous with the front side of the power generation equipment room 6A on the right side of the right vertical plate 3a on the swing frame 3, and is formed in a substantially I-shape in a plan view extending from the middle in the longitudinal direction to the front end. ing. The power generation equipment room 6A houses power generation equipment and an electric motor 53, and the hydraulic equipment room 6B houses hydraulic equipment such as a hydraulic pump 41 that is driven by the electric motor 53 and supplies hydraulic oil to various hydraulic actuators 44. It is accommodated. The power generation equipment room 6A and the hydraulic equipment room 6B are covered with a casing 20 so that the respective components accommodated therein are not exposed.

[casing]
The casing 20 includes a main body part 21 having an opening 8 formed on the upper surface for taking in and taking out a fuel tank unit (removable mounted object) 51 to be described later, and a main body part 21 provided above the main body part 21 to open and close the opening 8. It has a bonnet (lid part) 22.

(Main body)
The main body portion 21 includes a guard frame 23, a guard cover 24, a pump cover 25, a tank cover 26, and a valve cover 27. The guard frame 23 and the guard cover 24 define a power generation equipment room 6A, and the pump cover 25, the tank cover 26, and the valve cover 27 define a hydraulic equipment room 6B.

The guard frame 23 is composed of a plurality of pillars 28 and a plurality of beams 29. The pillars 28 and the beams 29 are made of steel and have an L-shaped or U-shaped cross section. The lower end of each support column 28 is fixed to a bracket or the like provided on the swing frame 3 with bolts. Each beam 29 is fixed to a plurality of support columns 28 at the same height using bolts, and assembled into a predetermined box-shaped frame structure.

The struts 28 are erected at the first to eighth positions on the swing frame 3, respectively. A first support post 28a is installed at a first position immediately behind the cab 5 at the left end of the swing frame 3, and a second support post 28a is installed at a second position immediately to the left of the left vertical plate 3a and to the right of the first position. Two pillars 28b are erected, a third pillar 28c is erected at a third position behind the first position, and a fourth pillar 28c is installed at a fourth position to the right of the third position at the right end of the rotating frame 3. 28d is erected, a 5th column 28e is erected at a 5th position behind the 3rd position and immediately before the counterweight 7, and a 5th column 28e is erected at a 6th position behind the 4th position and to the right of the 5th position. A sixth pillar 28f is erected, a seventh pillar 28g is erected at a seventh position behind the second position and to the right of the third position, and an eighth pillar 28g is erected approximately halfway between the sixth and seventh positions. An eighth pillar 28h is erected at the position. The seventh pillar 28g and the eighth pillar 28h are formed longer than the first to sixth pillars 28a to 25f, and constitute a positioning member 70, which will be described later.

The beams 29 are connected between the columns 28 at the first and second positions, between the columns 28 at the first and third positions, between the columns 28 at the second and seventh positions, between the columns 28 at the third and seventh positions, and between the columns 28 at the third and seventh positions. and between the columns 28 in the 8th position, between the columns 28 in the 8th and 4th positions, between the columns 28 in the 3rd and 5th positions, between the columns 28 in the 4th and 6th positions, and in the 5th and 6th positions. A plurality of them are provided so as to connect each of the 28 spaces. The plurality of beams 29 connect the columns 28 at the same height positions. Note that each beam 29 is provided at a height position of the upper end portion of the first to sixth columns 28a to 25f. Therefore, a seventh support 28g and an eighth support 28h that constitute a positioning member 70, which will be described later, protrude upward from the upper surface of each beam 29.

The guard cover 24 is composed of a panel made of a plurality of steel plates attached to the pillars 28 and beams 29 of the guard frame 23. In the first embodiment, the guard cover 24 covers the upper surface of the rear part 6A1 of the power generation equipment room 6A, the left and right side surfaces, the back surface, and the upper part of the exposed portion of the front surface (above the upper surface of the scaffolding member 30 described later). The upper surface, left and right side surfaces, and front surface of the front section 6A2 of the power generation equipment room 6A are covered with a guard cover 24. The above-mentioned opening 8 is formed on the upper surface of the guard cover 24 that constitutes the upper surface of the main body portion 21 . Specifically, the opening 8 is formed in one of the panels forming the guard cover 24, which forms the upper surface of the rear part 6A1 of the power generation equipment chamber 6A in which the fuel tank unit 51 is accommodated.

Note that the panel (part of the guard cover 24) that constitutes the upper surface of the rear part 6A1 of the power generation equipment room 6A in which the opening 8 is formed is attached to the upper surface of the first to sixth columns 28a to 25f and each beam 29. . Therefore, the seventh support 28g and the eighth support 28h that constitute the positioning member 70, which will be described later, are connected to the upper surface ( The upper surface of the main body portion 21 is protruded upward. In other words, the seventh support 28g and the eighth support 28h protrude upward from the main body 21. Note that the seventh support 28g and the eighth support 28h protrude upward from the main body 21, but when the bonnet 22, which will be described later, is closed, they are inside the bonnet 22, that is, inside the power generation equipment room 6A (machine room). It is set up to fit. The bonnet 22 only needs to be able to open and close the opening 8, and includes the portions of the seventh support 28g and the eighth support 28h that protrude upward from the main body 21 (the outer portion 71 of the positioning member 70, which will be described later). may not be covered by the bonnet 22.

Further, as described above, the opening 8 serves as an entrance/exit of the fuel tank unit 51 when the fuel tank unit (removable mounting object) 51 is replaced. Therefore, the opening 8 is formed to a size that allows the fuel tank unit 51 to be taken in and taken out. In the first embodiment, the opening 8 is formed in a rectangular shape in which the length from side to side is longer than the length from front to back when viewed from above. Further, the opening 8 is formed such that a seventh support 28g and an eighth support 28h, which will be a positioning member 70 to be described later, are arranged at the peripheral edge of the opening 8 (in the first embodiment, the front edge).

Among the panels constituting the guard cover 24, the panels constituting the left and right side surfaces of the power generation equipment chamber 6A in which the fuel tank unit 51 is housed are formed to be openable and closable. By opening either one of the panels constituting the left and right side surfaces of the power generation equipment room 6A, when replacing the fuel tank unit 51, which will be described later, the pipes connected to the fuel tank unit 51 can be attached and detached, and the fuel tank unit 51 can be installed at the installation position. It can be fixed or unfixed. Further, by opening either one of the panels constituting the left and right side surfaces of the power generating equipment room 6A, maintenance of the various power generating equipment housed in the power generating equipment room 6A can be performed.

The power generation equipment room 6A is divided by the guard frame 23 and the guard cover 24 having the above configuration, and the power generation equipment room 6A includes a fuel tank unit (internally mounted object) 51, a power generation unit 52, an electric motor 53, A radiator 54 is housed therein.

A fuel tank unit 51 and a power generation unit 52 are arranged in the center portion of the power generation equipment room 6A in the left and right direction. The power generation unit 52 is fixed on the rotating frame 3, and the fuel tank unit 51 is installed above the power generation unit 52 (at a predetermined installation position), and is fixed at the installation position with a fixture (not shown) so as not to shift. . For example, an installation stand is installed in the power generation equipment room 6A, a fuel tank unit 51 is mounted on the upper surface of the installation stand, and a power generation unit 52 is accommodated below the installation stand. The fuel tank unit 51 mounted on the top surface of the installation base and the installation base are fixed by bolting or the like. The fuel tank unit 51 and the power generation unit 52 are connected to piping and the like for guiding the fuel in the fuel tank unit 51 to the power generation unit 52.

In the first embodiment, the fuel tank unit 51 is provided such that the upper end thereof is located above the upper surface of the main body portion 21 at the installation position. The upper end of the fuel tank unit 51 protrudes upward from the main body 21, but when the bonnet 22 is closed, it is installed so that it fits inside the bonnet 22, that is, inside the power generation equipment room 6A (machine room). It is being In the first embodiment, the fuel tank unit 51 is arranged at the top of the casing 20 where no other components are arranged above. Note that the installation position of the fuel tank unit 51 is not limited to the above-mentioned position as long as the fuel tank unit 51 is stored in the casing 20. The installation position of the fuel tank unit 51 may be such that the fuel tank unit 51 does not protrude upward from the main body 21 and is entirely housed inside the main body 21 . Further, the fuel tank unit 51 may be mounted on the rotating frame 3 without using an installation stand.

An electric motor 53 is arranged on the right side of the power generation unit 52 in the power generation equipment room 6A, and a radiator 54 is housed on the left side. A portion of the front side of the power generating equipment chamber 6A where the hydraulic equipment chamber 6B is continuous is not covered with the guard cover 24 and communicates with the hydraulic equipment room 6B. The electric motor 53 is connected to the hydraulic pump 41 arranged in the hydraulic equipment chamber 6B, and drives the hydraulic pump 41.

Like the guard cover 24, the pump cover 25, tank cover 26, and valve cover 27 that partition the hydraulic equipment chamber 6B are constructed of panels made of a plurality of steel plates. A hydraulic pump 41, a hydraulic oil tank 42, and a control valve 43 are housed in the hydraulic equipment chamber 6B. The hydraulic pump 41, the hydraulic oil tank 42, and the control valve 43 are installed in this order from the rear to the front on the swing frame 3. The pump cover 25, tank cover 26, and valve cover 27 are continuously provided in this order from the rear to the front on the swing frame 3.

The pump cover 25 covers the left and right sides and top surface of the hydraulic pump 41, the tank cover 26 covers the left and right sides and top surface of the hydraulic oil tank 42, and the valve cover 27 covers the left and right sides, top and front surface of the control valve 43. and cover. In the first embodiment, the pump cover 25 and the tank cover 26 are configured such that their upper surfaces are lower than the upper surface of the panel that constitutes the upper surface of the rear portion 6A1 of the power generation equipment chamber 6A in which the opening 8 is formed. The upper surface of the valve cover 27 is lower than the upper surfaces of the pump cover 25 and the tank cover 26, and is formed in a stepped shape.

(bonnet)
The bonnet 22 is a lid that is provided above the main body 21 and opens and closes the opening 8. The bonnet 22 is attached to the upper surface of the main body 21 via a hinge (not shown) so that the opening 8 can be opened or closed. The bonnet 22 is formed into a container shape that bulges upward in a closed position that closes the opening 8. Therefore, when the bonnet 22 is in the closed position, the article storage space in a part of the area in the power generation equipment room 6A (the area where the fuel tank unit 51 is mounted) is expanded upward. By opening the bonnet 22 and exposing the opening 8, it is possible to take in and take out the fuel tank unit 51, which will be described later, and to perform maintenance on various power generation equipment housed in the power generation equipment room 6A.

In the first embodiment, the bonnet 22 is opened and closed by rotating around the rotation axis of a hinge attached to the right end. Therefore, in the first embodiment, a scaffolding member 30 is provided between the pair of vertical plates 3a and 3a on the front side of the power generation equipment room 6A so that the worker who opens and closes the bonnet 22 can stand in a position directly in front of the bonnet 22. It is provided. The scaffolding member 30 is constituted by a panel made of a steel plate that is rectangular in plan view. The scaffolding member 30 is provided so that its upper surface is at the same height as the upper surface of the pump cover 25.

The machine room 6 is configured as described above. Note that among the hydraulic equipment connected to the hydraulic circuit 40, the hydraulic swing motor 45 is installed on the swing frame 3, but is arranged outside the hydraulic equipment chamber 6B. The hydraulic swing motor 45 is installed on the right rear side of the swivel joint 13 between the pair of vertical plates 3a, 3a on the swing frame 3.

The counterweight 7 is provided at the rear of the machine room 6 (power generation equipment room 6A). Specifically, the counterweight 7 is attached to the rear end portions of the pair of vertical plates 3a, 3a of the rotating frame 3. The counterweight 7 balances the weight with the attachment 4 by being attached to the rear ends of the pair of vertical plates 3a, 3a to which the attachment 4 is attached to the front ends.

[Drive system]
As shown in FIG. 5, the construction machine 10 includes hydraulic actuators 44 (travel hydraulic motors 11a of the left and right crawlers of the lower traveling body 1, hydraulic swing motors 45 of the upper rotating body 2, and hydraulic cylinders 4d to 4f of the attachment 4). ), and a drive device 50 that drives a hydraulic pump 41 of the hydraulic circuit 40.

A hydraulic pump 41 , a hydraulic oil tank 42 , a control valve 43 , and each hydraulic actuator 44 are connected to the hydraulic circuit 40 .

A hydraulic oil tank 42 and a control valve 43 are connected to the hydraulic pump 41 . The hydraulic pump 41 is driven by an electric motor 53, sucks hydraulic oil from the hydraulic oil tank 42, and discharges it toward the control valve 43. The control valve 43 distributes the hydraulic oil discharged from the hydraulic pump 41 to each hydraulic actuator 44, and operates each hydraulic actuator 44. The control valve 43 controls the supply direction and amount of hydraulic oil supplied to each hydraulic actuator 44 to cause the lower traveling body 1 to travel, the upper rotating body 2 to rotate, and the boom 4a of the attachment 4 and the arm 4b and bucket 4c are operated.

In the first embodiment, the drive device 50 is configured to drive the hydraulic pump 41 using hydrogen as a power source. Specifically, the drive device 50 includes a fuel tank unit 51, a power generation unit 52, and an electric motor 53.

The fuel tank unit 51 includes a plurality of fuel tanks 55 and a holding member 56 that holds the plurality of fuel tanks 55. The fuel tank 55 is a substantially cylindrical hydrogen tank filled with hydrogen gas, and in the first embodiment, four fuel tanks are provided. The holding member 56 is composed of a casing in which four fuel tanks 55 are housed. The holding member 56 is made of, for example, a steel plate, and is configured to hold the four fuel tanks 55 therein.

The power generation unit 52 includes a fuel cell unit 57, a power conversion device 58, a battery 59, and a holding member 60 that holds these. The fuel cell unit 57 is connected to the fuel tank unit 51 and the power converter 58, generates electricity through a chemical reaction between hydrogen and oxygen supplied from the fuel tank 55, and supplies the generated DC power to the power converter 58. . The fuel cell unit 57 is also connected to a battery 59, and, for example, surplus power during low loads is stored in the battery 59 and used during high loads. The power conversion device 58 is connected to the fuel cell unit 57 and the electric motor 53, converts the DC power supplied from the fuel cell unit 57 into AC power, and supplies the AC power to the electric motor 53. The holding member 60 is composed of a casing in which a fuel cell unit 57, a power conversion device 58, and a battery 59 are housed. The holding member 60 is made of, for example, a steel plate.

The electric motor 53 is electrically connected to the power conversion device 58 and coupled to the rotating shaft of the hydraulic pump 41 so as to rotationally drive the hydraulic pump 41. The electric motor 53 is driven by an alternating current supplied from the power converter 58, and rotates the hydraulic pump 41. By rotationally driving the hydraulic pump 41, the hydraulic oil of the hydraulic circuit 40 is supplied to each hydraulic actuator, and the lower traveling body 1 travels, the upper rotating body 2 rotates, or the boom 4a, arm 4b, and bucket 4c of the attachment 4 are rotated. works.

[Positioning member]
In the construction machine 10, the fuel tank unit 51 is fixed on top of the power generation unit 52 (at a predetermined installation position) in the power generation equipment room 6A using a fixing device that can be fixed and released, so that the fuel tank unit 51 can be attached and detached to the predetermined installation position. is set up. In the construction machine 10, by detachably mounting the fuel tank unit 51 in this manner, fuel can be refilled by replacing the used fuel tank unit 51 with the fuel tank unit 51 that has been filled with fuel. There is. With such a configuration, the time required to refuel the construction machine 10 can be shortened compared to the case where four fuel tanks 55 are mounted on the construction machine 10 and each fuel tank 55 is refueled. Can be done.

Incidentally, since the fuel tank unit (internally mounted object) 51 in which a plurality of fuel tanks 55 are built-in is large, a crane 61 is used for removal and installation. Since the fuel tank unit 51 is housed in the casing 20 of the machine room 6 (in the first embodiment, the power generation equipment room 6A), which cannot be seen from the outside of the construction machine 10, the fuel tank unit 51 is not visible from the outside of the construction machine 10. The operator cannot visually recognize the installation position of the fuel tank unit (internally mounted object) 51, making it difficult to align the fuel tank unit (internally mounted object) 51.

Therefore, in the first embodiment, the bonnet (lid) 22 of the casing 20 of the power generation equipment room (machine room) 6A is opened, the fuel tank unit (internally mounted object) 51 is lowered from above the opening 8, and the casing 20 is opened. A positioning member 70 serving as a mark is provided so that the fuel tank unit 51 can be easily installed at a predetermined installation position when the unit is installed in the main body portion 21 (when installing a load). The positioning member 70 has a guide portion that guides the fuel tank unit 51 to a predetermined installation position by allowing the fuel tank unit 51 to slide in the vertical direction while in contact with the fuel tank unit 51 when the unit is installed. are doing. Further, the positioning member 70 is configured to have an outer portion 71 located above the upper surface of the main body portion 21 .

Specifically, in the first embodiment, two vertically extending columns (seventh column 28g and eighth column 28h) that constitute the guard frame 23 of the main body portion 21 serve as the positioning member 70. In Embodiment 1, the seventh support 28g and the eighth support 28h are provided at the front edge of the opening 8, and the rear surfaces formed as smooth surfaces with no unevenness are located at predetermined installation positions in a plan view. It is provided so as to be placed in contact with the front surface (outside shape) of the tank unit 51. The rear surfaces of the seventh support 28g and the eighth support 28h are provided at positions that contact the outer shape of the fuel tank unit 51 at a predetermined installation position in a plan view, extend in the vertical direction, and allow the fuel tank unit 51 to slide in the vertical direction. A guiding section is configured to allow this.

In the first embodiment, since the fuel tank unit 51 is installed at a position in the front-rear direction where the front surface overlaps the front edge of the opening 8 in plan view, the seventh support 28g and the eighth support 28h are located inside the opening 8. However, if the fuel tank unit 51 is installed at a position behind the front edge of the opening 8, the seventh support 28g and the eighth support 28h may be provided so as to project inside the opening 8. . By arranging the seventh support 28g and the eighth support 28h (positioning member 70) in this way, the guide portions (the rear surfaces of the seventh support 28g and the eighth support 28h) of the positioning member 70 are positioned at the predetermined installation positions in plan view. The fuel tank unit 51 is located at a position in contact with the outer shape (front surface) of the fuel tank unit 51.

Further, the seventh support 28g and the eighth support 28h protrude upward from the panel forming the upper surface of the main body 21 (the upper surface of the guard cover 24). That is, the seventh support 28g and the eighth support 28h, which serve as the positioning member 70, have outer portions 71 that protrude upward from the upper surface of the main body 21. Note that the seventh support 28g and the eighth support 28h that constitute the positioning member 70 are formed to have a length (height of the upper end) that allows the worker operating the crane 61 to visually recognize the outer portion 71 when the unit is installed. . Further, the seventh support 28g and the eighth support 28h that constitute the positioning member 70 are provided such that at least the upper end of the outer portion 71 is located above the upper end of the counterweight (rear mounted object) 7. .

With this configuration, when installing the unit, the crane 61 moves the fuel tank unit 51 toward the outer portion 71 of the positioning member 70 (seventh column 28g and eighth column 28h) that can be seen from a distance, and By bringing the front surface of the fuel tank unit 51 (the front surface of the holding member 56 made of a housing) into contact with the rear surface (guiding part) of the positioning member 70, the fuel tank unit 51 is positioned at a predetermined installation position above the opening 8. The fuel tank unit 51 can be easily and accurately placed (positioned) in the upper position (a position where the fuel tank unit 51 can be mounted at a predetermined installation position by simply lowering it) in the front-rear direction. Further, for example, when the seventh support 28g and the eighth support 28h are installed at positions equidistant from the middle position in the left-right direction of the opening 8, the two positioning members 70 (the seventh support 28g and the eighth support Since the middle position in the left-right direction of the opening 8 can be recognized from the outer part 71 of the support column 28h), the fuel tank unit 51 can be accurately positioned above the predetermined installation position in the left-right direction as well. can be placed.

Then, when the fuel tank unit 51 is lowered while sliding the front surface of the fuel tank unit 51 with the rear surface (guiding part) of the positioning member 70, the fuel tank unit 51 is guided to a predetermined installation position.

In the first embodiment, the seventh support 28g and the eighth support 28h extend downward from a position above the top surface of the main body 21 and extend to the top surface of the swing frame 3. As a result, the rear surfaces of the seventh support 28g and the eighth support 28h (guide portions of the positioning member 70), which are formed as smooth surfaces with no unevenness, also extend from a position above the top surface of the main body 21 to the top surface of the rotating frame 3. It is extending. Therefore, when installing the unit, if the front surface of the fuel tank unit 51 is slid onto the rear surface (guiding section) of the outer part 71 of the positioning member 70 and lowered, the rear surface (guiding section) of the positioning member 70 can also be moved inside the main body section 21. ) slides on the front surface of the fuel tank unit 51 and guides the fuel tank unit 51 to a predetermined installation position without shifting the position. That is, in the first embodiment, the seventh support 28g and the eighth support 28h, which serve as the positioning member 70, extend downward continuously from the lower end of the outer portion 71, and are located at predetermined installation positions inside the main body 21. It has an inner portion 79 that contacts the tank unit 51. Therefore, when the fuel tank unit 51 is installed on the top surface of the installation stand, even if the fuel tank unit 51 is mounted with a low height such that the top end is located below the top surface of the main body part 21, the fuel tank unit 51 on the rear surface of the seventh support 28g and the eighth support 28h (guiding portion of the positioning member 70), even if the upper end of the fuel tank unit 51 enters into the main body 21 through the opening 8, , the fuel tank unit 51 can be guided to a predetermined installation position.

Note that when the fuel tank unit 51 contacts the front inner wall surface of the main body section 21 at the predetermined installation position, the inner portion 79 may be formed by the front inner wall surface of the main body section 21 .

[How to replace the fuel tank unit]
Next, a method for replacing the fuel tank unit 51 will be described with reference to FIGS. 6 and 7. FIG. 6 shows a procedure (removal method) for removing the used fuel tank unit 51a, and FIG. 7 shows a procedure (installation method) for installing the filled fuel tank unit 51b.

(How to remove)
First, as shown in FIG. 6(a), open the panels (parts of the guard cover 24) that constitute the left and right sides of the power generation equipment room 6A, remove the pipes connected to the used fuel tank unit 51a, and By operating the fixture that fixes the used fuel tank unit 51a at the installation position, the used fuel tank unit 51a is unlocked.

Next, as shown in FIG. 6(b), the crane truck 60 loaded with the filled fuel tank unit 51b is brought close to the construction machine 10, and the bonnet 22 is opened to expose the opening 8. Then, a slinging operation is performed in which the used fuel tank unit 51a is hung on the hook of the crane 61.

When the slinging operation is completed, the used fuel tank unit 51a is lifted directly upward by operating the crane 61 and taken out from the opening 8 to the outside of the machine room 6, as shown in FIG. 6(c). Then, after rotating the crane 61 and moving the used fuel tank unit 51a above the loading platform of the crane truck 60, the crane 61 is lowered onto the loading platform, and a slinging operation is performed to remove the used fuel tank unit 51a from the hook of the crane 61. conduct.

Through the above procedure, the used fuel tank unit 51a is removed.

(Installation method)
First, a slinging operation is performed in which the filled fuel tank unit 51b loaded on the platform of the crane truck 60 is hooked onto the hook of the crane 61. When the sling work is completed, as shown in FIG. 7(a), the filled fuel tank unit 51b is pulled up by the crane 61, and by rotating the crane 61, the filled fuel tank unit 51b is placed directly in the opening 8. move it up. At this time, as shown in FIG. 9, using the outer portion 71 of the positioning member 70 (the seventh column 28g and the eighth column 28h) located above the upper surface of the main body 21 as a mark, fill the filled fuel tank unit 51b. Positioning is performed so that the front surface of the holding member 56 made of a housing contacts the rear surface (guiding portion) of the positioning member 70, and the filled fuel tank unit 51b is placed above the predetermined installation position. Then, the filled fuel tank unit 51b is lowered while sliding the front surface onto the rear surface (guiding section) of the positioning member 70. As a result, the filled fuel tank unit 51b descends along the positioning member 70 and is guided to a predetermined installation position.

After the filled fuel tank unit 51b is placed at a predetermined installation position, a slinging operation is performed to remove the filled fuel tank unit 51b from the hook of the crane 61, as shown in FIG. 7(a). When the slinging work is completed, as shown in FIG. 7(c), the filled fuel tank unit 51b is fixed in the installation position by operating the fixture, and the power generation unit 52 (fuel cell Connect the piping to be connected to the unit 57).

Through the above procedure, the filled fuel tank unit 51b is installed (mounted).

-Effects of Embodiment 1-
In the construction machine 10 of the first embodiment, when the unit is installed (when installing the load), the bonnet 22 of the casing 20 is opened and the fuel tank unit 51 (internal load) is lowered from above the opening 8 and installed inside the main body 21. ) is provided with a positioning member 70 that guides the fuel tank unit 51 to a predetermined installation position by coming into contact with the fuel tank unit 51. The positioning member 70 has a guide part (rear face) that extends in the vertical direction and allows the fuel tank unit 51 to slide in the vertical direction. It is provided at a position that is in contact with the outer shape of the unit 51. Further, the positioning member 70 has an outer portion 71 located above the main body portion 21 when the unit is installed. Therefore, by moving the fuel tank unit 51 with the crane 61 toward the outer part 71 of the positioning member 70 that can be seen even from a distant position, and bringing the fuel tank unit 51 into contact with the guiding part (rear surface) of the positioning member 70. , the fuel tank unit 51 can be easily placed (positioned) above the predetermined installation position. Then, if the fuel tank unit 51 is lowered while sliding on the guide part (rear face) of the positioning member 70 at a position where the fuel tank unit 51 is brought into contact with the guide part (rear face) of the positioning member 70, the fuel tank unit 51 can be easily refueled. The tank unit 51 can be installed at a predetermined installation position. That is, according to the first embodiment, by providing the positioning member 70, the fuel tank unit 51 can be easily placed above the predetermined installation position, and the fuel tank unit 51 can be easily placed above the predetermined installation position. It can be easily installed at a desired location without colliding with equipment and damaging it.

Further, in the construction machine 10 of the first embodiment, at least the upper end of the outer portion 71 of the positioning member 70 is located above the upper end of the counterweight (rear loading object) 7, so that the crane 61 cannot be operated. Even when the worker is on the rear side of the construction machine 10, at least the upper end of the outer portion 71 of the positioning member 70 can be visually recognized. Therefore, even if the counterweight 7 is bulky, the fuel tank unit 51 can be easily placed above the predetermined installation position.

Furthermore, in the construction machine 10 of the first embodiment, the fuel tank unit 51 has only the openable and closable bonnet 22 disposed above in the casing 20, so it is not necessary to remove other components when replacing the fuel tank unit 51. It can be easily replaced.

Further, in the construction machine 10 of the first embodiment, since two (plurality) of positioning members 70 are provided, the fuel tank unit 51 can be brought into contact with the rear surfaces (guiding parts) of the two positioning members 70 and lowered. . Therefore, when installing the unit, by rotating the fuel tank unit 51 suspended by the crane 61 in a horizontal plane and bringing the front surface into contact with the rear surfaces (guiding parts) of the two positioning members 70, the fuel tank unit 51 can be installed. It can be placed (positioned) in a desired direction at a position above a predetermined installation position. In addition, by lowering the front surface of the fuel tank unit 51 while sliding it on the rear surfaces (guiding parts) of the two positioning members 70, the fuel tank unit 51 can be lowered while maintaining the desired orientation. 51 can be easily installed at a desired position without colliding with other parts or the aircraft body and causing damage.

Further, in the construction machine 10 of the first embodiment, the positioning member 70 is configured to have an inner portion 79 that extends downward continuously from the lower end of the outer portion 71, and the rear surface (guiding portion) of the positioning member 70 is It is formed to have a smooth surface without unevenness from the outer portion 71 to the inner portion 79. Therefore, when installing the fuel tank unit 51, the positioning member is used not only when the fuel tank unit 51 is above the opening, but also when it enters the main body 21 of the casing 20 from above the opening 8 and reaches a predetermined installation position. It can be lowered while remaining in contact with the rear surface (guiding part) of 70. In other words, according to the construction machine 10 of the first embodiment, the fuel tank unit 51 is routed along the desired route from above the opening 8 to the predetermined installation position inside the main body 21, regardless of the height of the fuel tank unit 51. It can be lowered without shifting the position. Therefore, according to the construction machine 10 of Embodiment 1, the fuel tank unit 51 is not only located above the main body 21 but also after entering the interior, the fuel tank unit 51 is positioned on the rear surface (guide) of the positioning member 70. Since the fuel tank unit 51 can be lowered while remaining in contact with the main body part 21 of the casing 20, it is possible to install the fuel tank unit 51 at a desired position with high accuracy without colliding with other parts or the aircraft body and damaging them. Can be done.

《Embodiment 2 of the invention》
In the second embodiment, a part of the construction machine 10 of the first embodiment is changed so that the positioning member 70 and the fuel tank unit 51 are fitted together.

Specifically, as shown in FIG. 9, in the second embodiment, the fuel tank unit (internally mounted object) 51 is attached to a convex portion of a positioning member 70 (described later) (in FIG. 9, a seventh column 28g and an eighth column 28h). The entire body has a vertically extending recess 72 into which it is slidably fitted. Specifically, by forming two grooves on the front surface of the box-shaped holding member 56 of the fuel tank unit 51, two recesses 72 are formed on the front surface of the holding member 56. The recess 72 is formed to have a U-shaped cross section so that at least the rear ends (the entirety in FIG. 9) of the seventh support 28g and the eighth support 28h, each having a rectangular cross section, are slidably fitted into the recess 72. In the second embodiment, the recess 72 is formed as a groove extending from the upper end to the lower end of the holding member 56.

Note that the recess 72 may be formed integrally with the holding member 56 or may be formed separately and fixed to the front surface of the holding member 56. Further, when formed separately and fixed to the front surface of the holding member 56, the recess 72 does not need to be formed from the upper end to the lower end of the holding member 56, and the recess 72 does not need to be formed to extend from the upper end to the lower end of the holding member 56. It is sufficient that the convex portion of the positioning member 70 is provided at a length and position that allows the convex portion to fit.

On the other hand, in the second embodiment, the seventh support 28g and the eighth support 28h constituting the positioning member 70 are fixed to the rear surface of the beam 29 that connects the upper ends of the third and fourth support 28c, 28d. It is arranged within the opening 8. At least the rear end portions (the entirety in FIG. 9) of the seventh support 28g and the eighth support 28h arranged in the opening 8 extend in the vertical direction and are slidably fitted into the recess 72 of the fuel tank unit 51. It constitutes a convex portion and is provided at a position that fits into (contacts the outer shape of) the recess 72 of the fuel tank unit 51 located at a predetermined installation position in plan view. In the second embodiment, the convex portion of the positioning member 70 (the entirety of the seventh column 28g and the eighth column 28h in FIG. 9) is fitted (in contact) with the concave portion 72 of the fuel tank unit 51 when the unit is installed. By allowing the fuel tank unit 51 to slide in the vertical direction in this state, it becomes a guiding portion that guides the fuel tank unit 51 to a predetermined installation position within the main body portion 21 . Note that only the rear end portions of the seventh support 28g and the eighth support 28h may be configured to fit into the recess 72 of the fuel tank unit 51 (become a convex portion of the positioning member 70).

With the above configuration, as shown in FIG. 8, when installing the unit, the fuel tank unit 51 is moved by the crane 61 toward the outer part 71 of the positioning member 70, which can be seen from a distance, and the fuel tank unit 51 is moved above the opening 8. , the two positioning members 70 are arranged so that the convex portions (in FIG. 9, the entirety of the seventh column 28g and the eighth column 28h) fit into the two concave portions 72, respectively. In this manner, by fitting the convex portion of the positioning member 70 into the concave portion 72, the fuel tank unit 51 can be easily positioned in the front-rear direction and the left-right direction above the opening 8. That is, above the opening 8, the fuel tank unit 51 can be easily arranged (positioned) above the predetermined installation position. Then, when the fuel tank unit 51 is lowered, the fuel tank unit 51 is guided to a predetermined installation position without being displaced forward, left or right.

Specifically, the groove bottom surface (front surface) of the recessed portion 72 comes into contact with the rear surface of the convex portion of the positioning member 70, thereby suppressing forward displacement of the fuel tank unit 51. In addition, the right inner side surface and the left inner side surface of the recessed portion 72 abut the left side surface and the right side surface of the convex portion of the positioning member 70, respectively, so that displacement of the fuel tank unit 51 in the left and right sides is suppressed. Therefore, according to the construction machine 10 of the second embodiment, when the fuel tank unit 51 is lowered, it is possible to restrict the displacement of the fuel tank unit 51 in the horizontal direction. It can be easily installed at a desired location without causing damage due to collision with the aircraft.

-Modification 1 of Embodiment 2-
Modification 1 is the construction machine 10 of Embodiment 2 in which the cross-sectional shapes of the convex portion of the positioning member 70 and the concave portion 72 into which the convex portion is fitted are changed.

Specifically, as shown in FIG. 10, the convex portion of the positioning member 70 (in FIG. 10, the entirety of the seventh column 28g and the eighth column 28h) has an outer shape in a cross section that is gradually shaped as it goes from the front side to the rear side. , is formed into a trapezoidal shape with a narrow width. On the other hand, the recess 72 has a trapezoidal cross-sectional shape whose width becomes narrower toward the bottom of the groove into which the cross-sectional shape (trapezoidal shape) of the protrusion of the positioning member 70 fits. By forming the convex portion and the recessed portion 72 in such a cross-sectional shape, it becomes easier to fit the convex portion into the recessed portion 72.

Further, in the first modification, the convex portion of the positioning member 70 is provided with a cover member 73 that covers the surfaces (rear surface and left and right side surfaces) facing the inner surface of the recessed portion 72. The cover member 73 is made of resin or the like that can improve the sliding surface of the convex portion and the concave portion 72 . By providing the cover member 73 on the convex portion in this way, it is possible to suppress the convex portion from being scratched when facing the inner surface of the concave portion 72 . Further, when the convex portion and the concave portion 72 slide, the sliding is improved, so that wear of the sliding surface can be suppressed.

Note that the cross-sectional shape of the convex portion and the concave portion 72 of the positioning member 70 is not limited to a U-shape (the convex portion is rectangular) or a trapezoidal shape. Any other shape, such as a U-shape or a V-shape, may be used as long as the convex portion and the concave portion 72 fit together to prevent the fuel tank unit 51 from shifting forward and to the left and right sides when lowered. It may be in the shape of

《Embodiment 3 of the invention》
Embodiment 3 is a configuration in which a part of the construction machine 10 of Embodiment 1 is changed so that the positioning member 70 and the fuel tank unit 51 fit together.

Specifically, as shown in FIG. 11, in the third embodiment, the fuel tank unit (internally mounted object) 51 is located in a recessed portion of a positioning member 70 (in FIG. 11, the entirety of the seventh support 28g and the eighth support 28h). ) has a convex portion 74 that extends in the vertical direction and is slidably fitted into the convex portion 74. Specifically, the convex portion 74 protrudes forward from the front surface of the box-shaped holding member 56 of the fuel tank unit 51 and extends from the lower end to the upper end of the holding member 56. In the third embodiment, two convex portions 74 are formed at positions corresponding to the seventh support column 28g and the eighth support column 28h.

Note that the convex portion 74 may be formed integrally with the holding member 56 or may be formed separately and fixed to the front surface of the holding member 56. In addition, when formed separately and fixed to the front surface of the holding member 56, the convex portion 74 does not need to be formed from the upper end to the lower end of the holding member 56, and the convex portion 74 does not need to be formed so as to extend from the upper end to the lower end of the holding member 56. It is sufficient that the length and position are such that it fits into the recess of the positioning member 70 until the position is reached.

On the other hand, in the third embodiment, the seventh support 28g and the eighth support 28h constituting the positioning member 70 are arranged on the rear surface of the beam 29 that connects the upper ends of the third and fourth support 28c, 28d. , and is arranged within the opening 8 in plan view. In the third embodiment, the seventh support 28g and the eighth support 28h are made of a steel material having a U-shaped cross section into which the projection 74 of the fuel tank unit 51 is slidably fitted. 74 is fixed to the beam 29 in a direction opening toward the rear so that the fuel tank unit 51 can be fitted into the recess of the positioning member 70 extending in the vertical direction, into which the protrusion 74 of the fuel tank unit 51 is slidably fitted. . The concave portion of the positioning member 70 disposed within the opening 8 (in FIG. 11, the entirety of the seventh column 28g and the eighth column 28h) corresponds to the convex portion 74 of the fuel tank unit 51 located at a predetermined installation position in plan view. It is provided at a position where it fits (contacts the outer shape). In the third embodiment, the recessed portion of the positioning member 70 allows the fuel tank unit 51 to slide in the vertical direction while the convex portion 74 of the fuel tank unit 51 is fitted (in contact with) when the unit is installed. This serves as a guide section that guides the fuel tank unit 51 to a predetermined installation position within the main body section 21. Note that only the rear end portions of the seventh support 28g and the eighth support 28h may constitute the recess of the positioning member 70 into which the protrusion 74 of the fuel tank unit 51 is fitted.

With the above configuration, as shown in FIG. 11, when installing the unit, the fuel tank unit 51 is moved by the crane 61 toward the outer part 71 of the positioning member 70, which can be seen even from a distance, and the fuel tank unit 51 is moved from above the opening 8. In this case, the two protrusions 74 are arranged so as to fit into the two recesses formed by the two positioning members 70 . In this manner, by fitting the convex portion 74 of the fuel tank unit 51 into the recess of the positioning member 70, the fuel tank unit 51 can be easily positioned in the front-rear direction and the left-right direction above the opening 8. Can be done. That is, above the opening 8, the fuel tank unit 51 can be easily arranged (positioned) above the predetermined installation position. Then, when the fuel tank unit 51 is lowered, the fuel tank unit 51 is guided to a predetermined installation position without being displaced forward or to the left or right.

Specifically, the groove bottom surface of the recess comes into contact with the front surface of the protrusion 74 of the fuel tank unit 51, thereby suppressing forward displacement of the fuel tank unit 51. Furthermore, the right inner surface and the left inner surface of the recess abut the left and right side surfaces of the convex portion 74, respectively, thereby suppressing displacement of the fuel tank unit 51 in the left-right direction. Therefore, according to the construction machine 10 of the third embodiment, when lowering the fuel tank unit 51, it is possible to restrict horizontal displacement of the fuel tank unit 51. It can be easily installed at a desired location without causing damage due to collision with the aircraft.

Note that in the third embodiment, as in the first modification of the second embodiment, the cross-sectional shape of the recess of the positioning member 70 and the convex part 74 fitted in the recess can be changed, and the shape is different from that of the fuel. Any other shape may be used as long as the shape prevents the tank unit 51 from shifting forward and to the left and right sides when the tank unit 51 is lowered.

Further, in the third embodiment, similarly to the first modification of the second embodiment, the convex portion 74 faces the inner surface of the recessed portion of the positioning member 70 (the entirety of the seventh support 28g and the eighth support 28h in FIG. 11). A cover member may be provided to cover the surfaces (front and left and right side surfaces). By providing the cover member, it is possible to prevent the convex portion 74 from being scratched when it faces the inner surface of the concave portion, and also to improve sliding when the convex portion 74 and the concave portion slide. Wear of the moving surface can be suppressed.

《Embodiment 4 of the invention》
Embodiment 4 is the construction machine 10 of Embodiment 2 in which the configuration of the recess 72 is partially changed.

Specifically, as shown in FIG. 12, in the fourth embodiment, the lower end portion of the recessed portion 72 is configured as a lower widened portion 75 whose left and right width becomes wider from the upper side toward the lower side. In the lower widened portion 75, the distance between the left and right inner surfaces increases from the upper side toward the lower side.

With such a configuration, according to the construction machine 10 of the fourth embodiment, the recess 72 of the fuel tank unit 51 lifted by the crane 61 above the opening 8 is aligned with the convex portions of the positioning member 70 (the seventh support column 28g and the eighth support column 28g). When aligning the fuel tank unit 51 to correspond to the support column 28h), the lower end of the recess 72 has a wide width in the left and right directions, so even if the position of the fuel tank unit 51 in the left and right direction is slightly shifted, it is difficult to position it. The lower end of the recess 72 can be fitted into the protrusion of the member 70. Then, when the fuel tank unit 51 is lowered with the protrusion of the positioning member 70 fitted into the recess 72, the position of the fuel tank unit 51 in the left-right direction is corrected. Therefore, according to the construction machine 10 of the fourth embodiment, the fuel tank unit 51 can be more easily installed at a desired position.

In the fourth embodiment as well, the recess 72 may be formed integrally with the holding member 56 or may be formed separately and fixed to the front surface of the holding member 56. Further, when formed separately and fixed to the front surface of the holding member 56, the recess 72 does not need to be formed from the upper end to the lower end of the holding member 56, and the recess 72 does not need to be formed to extend from the upper end to the lower end of the holding member 56. It is sufficient that the convex portion of the positioning member 70 is provided at a length and position that allows the convex portion to fit.

Also, in the fourth embodiment, only the rear end portions of the seventh support 28g and the eighth support 28h are configured to fit into the recess 72 of the fuel tank unit 51 (become a convex portion of the positioning member 70). Good too.

Further, in the fourth embodiment, as in the first modification of the second embodiment, the cross-sectional shape of the positioning member 70 serving as a convex portion and the recess 72 into which the convex portion is fitted can be changed; Other shapes may be used as long as the fuel tank unit 51 is prevented from shifting forwardly and to the left and right sides when lowered.

Also, in the fourth embodiment, similarly to the first modification of the second embodiment, the convex portion of the positioning member 70 is provided with a cover member 73 that covers the surfaces (front and left and right side surfaces) facing the inner surface of the recessed portion 72. Good too. By providing the cover member 73, it is possible to prevent the protrusion of the positioning member 70 from being scratched when it faces the inner surface of the recess 72, and also prevent the protrusion of the positioning member 70 from being damaged when the convex portion of the positioning member 70 and the recess 72 slide. , By improving sliding, wear of the sliding surface can be suppressed.

《Embodiment 5 of the invention》
Embodiment 5 is the construction machine 10 of Embodiment 4 in which the configuration of the convex portion of the positioning member 70 is partially changed.

Specifically, as shown in FIG. 13, in the fifth embodiment, the convex portion of the positioning member 70 (the entirety of the seventh column 28g and the eighth column 28h in FIG. 13) is connected to the lower widened portion 75 of the recessed portion 72. It has a convex widened portion 76 that engages. The widened convex portion 76 is formed so that the width in the left and right directions increases from the upper side toward the lower side. When the fuel tank unit 51 is lowered from above the opening 8 to the predetermined installation position with the protrusion fitted into the recess 72, the widened protrusion 76 is formed between the outer surfaces (left and right sides) and the lower side of the recess 72. It is provided at a height position where there is no gap between the inner surfaces (left and right inner surfaces) of the widened portion 75. In the fifth embodiment, by forming substantially the lower half of the convex portion of the positioning member 70 as the convex widened portion 76, the convex widened portion 76 is provided at the above height position.

Note that the means for providing the widened convex portion 76 at the height position described above is not limited to the above-mentioned means. For example, only a portion of the convex portion of the positioning member 70 in the vertical direction that faces the lower widened portion 75 of the recessed portion 72 when the fuel tank unit 51 is in the installation position is formed as the widened convex portion 76. You may.

With this configuration, according to the construction machine 10 of the fifth embodiment, similarly to the fourth embodiment, the recess 72 of the fuel tank unit 51 lifted by the crane 61 above the opening 8 is aligned with the convex part of the positioning member 70. When aligning the fuel tank unit 51 in a corresponding manner, since the width of the lower end of the recess 72 in the left and right directions is wide, even if the position of the fuel tank unit 51 in the left and right directions is slightly shifted, the protrusion of the positioning member 70 The lower end portion of the recessed portion 72 can be fitted into the portion. Then, when the fuel tank unit 51 is lowered with the protrusion of the positioning member 70 fitted into the recess 72, the position of the fuel tank unit 51 in the left-right direction is corrected. Therefore, according to the construction machine 10 of the fifth embodiment, the fuel tank unit 51 can be more easily installed at a desired position.

In the fifth embodiment as well, the recess 72 may be formed integrally with the holding member 56 or may be formed separately and fixed to the front surface of the holding member 56. Further, when formed separately and fixed to the front surface of the holding member 56, the recess 72 does not need to be formed from the upper end to the lower end of the holding member 56, and the recess 72 does not need to be formed to extend from the upper end to the lower end of the holding member 56. It is sufficient that the convex portion of the positioning member 70 is provided at a length and position that allows the convex portion to fit.

Also, in the fifth embodiment, only the rear end portions of the seventh support 28g and the eighth support 28h are configured to fit into the recess 72 of the fuel tank unit 51 (become a convex portion of the positioning member 70). Good too.

Furthermore, in the fifth embodiment, as in the first modification of the second embodiment, the cross-sectional shapes of the positioning member 70 serving as a convex portion and the recessed portion 72 into which the convex portion is fitted can be changed; Other shapes may be used as long as the fuel tank unit 51 is prevented from shifting forwardly and to the left and right sides when lowered.

Also, in the fifth embodiment, similarly to the first modification of the second embodiment, a cover member 73 is provided on the convex portion of the positioning member 70 to cover the surfaces (front and left and right side surfaces) facing the inner surface of the recessed portion 72. It's okay. By providing the cover member 73, it is possible to prevent the protrusion of the positioning member 70 from being scratched when it faces the inner surface of the recess 72, and also prevent the protrusion of the positioning member 70 from being damaged when the convex portion of the positioning member 70 and the recess 72 slide. , By improving sliding, wear of the sliding surface can be suppressed.

《Embodiment 6 of the invention》
Embodiment 6 is the construction machine 10 of Embodiment 3 in which the configurations of the concave portion and convex portion 74 of the positioning member 70 are partially changed.

Specifically, as shown in FIG. 14, in Embodiment 6, the upper end portion of the recessed portion of the positioning member 70 (the entirety of the seventh support 28g and the eighth support 28h in FIG. 14) extends from the bottom toward the top. , the upper widened portion 77 is configured to have a wider left and right width. In the upper widened portion 77, the distance between the left and right inner surfaces increases from the lower side toward the upper side.

Further, in the sixth embodiment, the convex portion 74 has a convex widened portion 78 that engages with the upper widened portion 77 of the recess of the positioning member 70 . The widened convex portion 78 is formed so that the width in the left and right directions increases from the lower side toward the upper side. When the fuel tank unit 51 is lowered from above the opening 8 to a predetermined installation position with the protrusion 74 fitted into the recess of the positioning member 70, the protrusion widened portion 78 is positioned on the outer side surface (left and right side surfaces). It is provided at a height position where there is no gap between the inner surfaces (left and right inner surfaces) of the upper widened portion 77 of the recessed portion of the member 70.

With the above configuration, according to the construction machine 10 of the sixth embodiment, the fuel tank is positioned such that the convex part 74 of the fuel tank unit 51 lifted by the crane 61 above the opening 8 corresponds to the concave part of the positioning member 70. When aligning the unit 51, since the upper end of the recess of the positioning member 70 has a wide left and right width, even if the position of the fuel tank unit 51 in the left and right direction is slightly shifted, the convex part of the recess of the positioning member 70 can be The lower end of 74 can be fitted. Then, when the fuel tank unit 51 is lowered with the protrusion 74 fitted into the recess of the positioning member 70, the position of the fuel tank unit 51 in the left-right direction is corrected. Therefore, according to the construction machine 10 of the sixth embodiment, the fuel tank unit 51 can be more easily installed at a desired position.

In the sixth embodiment as well, the convex portion 74 may be formed integrally with the holding member 56 or may be formed separately and fixed to the front surface of the holding member 56. In addition, when formed separately and fixed to the front surface of the holding member 56, the convex portion 74 does not need to be formed from the upper end to the lower end of the holding member 56, and the convex portion 74 does not need to be formed so as to extend from the upper end to the lower end of the holding member 56. It is sufficient that the length and position are such that it fits into the recess of the positioning member 70 until the position is reached.

Also in the sixth embodiment, only the rear end portions of the seventh support 28g and the eighth support 28h may constitute the recess of the positioning member 70 into which the projection 74 of the fuel tank unit 51 is fitted.

Also, in the sixth embodiment, similarly to the first modification of the second embodiment, the cross-sectional shapes of the positioning member 70 serving as a recess and the convex portion 74 fitted into the recess can be changed; Other shapes may be used as long as the fuel tank unit 51 is prevented from shifting forwardly and to the left and right sides when lowered.

Also in the sixth embodiment, similarly to the first modification of the second embodiment, a cover member may be provided on the convex portion 74 to cover the surfaces (front and left and right side surfaces) facing the inner surface of the recess of the positioning member 70. good. By providing the cover member, it is possible to prevent the convex portion 74 from being scratched when it faces the inner surface of the concave portion, and also to improve sliding when the convex portion 74 and the concave portion slide. Wear of the moving surface can be suppressed.

In the sixth embodiment, only the concave portion of the positioning member 70 may have the upper widened portion 77, and the convex portion 74 may not have the widened convex portion 78.

《Embodiment 7 of the invention》
In the seventh embodiment, a second positioning member 80 is added to the construction machine 10 of the first embodiment.

Specifically, as shown in FIGS. 15 and 16, the second positioning member 80 is provided at a position opposite to the positioning member 70 with the opening 8 of the main body 21 interposed therebetween. Specifically, the second positioning member 80 is located at the peripheral edge of the opening 8 of the main body 21 and at the rear edge (opposite side) that is opposite to the front edge (one side) where the positioning member 70 is provided. ). The second positioning member 80 is a plate-shaped member extending upward from the upper end of the main body 21, and is made of, for example, a steel plate. The second positioning member 80 has a vertical portion 81 and an inclined portion 82 . The vertical portion 81 is a portion extending in the vertical direction, and the inclined portion 82 is a portion inclined with respect to the vertical direction. Specifically, the vertical part 81 extends vertically upward from the upper end of the main body part 21, and the inclined part 82 is continuous with the upper end of the vertical part 81, and is located further rearward from the lower side toward the upper side (the opening 8) with respect to the vertical direction.

Like the positioning member 70, the second positioning member 80 is formed at a height that fits inside the bonnet 22, that is, inside the power generation equipment room 6A (machine room) when the bonnet 22 is closed. Note that, like the outer portion 71 of the positioning member 70, the second positioning member 80 may not be covered by the bonnet 22.

With the above configuration, as shown in FIGS. 15 and 16, the second positioning member 80 having the inclined portion 82 is provided at a position facing the positioning member 70 across the opening 8 of the main body portion 21. Therefore, when installing the unit, use the outer part 71 of the positioning member 70 and the inclined part 82 of the second positioning member 80 as landmarks, and place the fuel tank unit 51 above the opening 8 so that the outer part of the positioning member 70 71 and the inclined portion 82 of the second positioning member 80, and is brought into contact with the positioning member 70 to lower the fuel tank unit 51. At this time, even if the fuel tank unit 51 is placed above the opening 8 at a position closer to the rear than the desired position (directly above the installation position), the fuel tank unit 51 is placed in the second positioning position. The member 80 contacts the inclined part 82 and descends along the inclined part 82 to be guided forward, and eventually the front surface contacts the positioning member 70 and the rear surface contacts the vertical part 81 of the second positioning member 80. guided to an appropriate position (directly above the installation position). Then, by lowering the fuel tank unit 51 as it is, the fuel tank unit 51 is guided to a predetermined installation position without being displaced in the front-rear direction. Therefore, according to the construction machine 10 of the seventh embodiment, the fuel tank unit 51 can be smoothly lowered even if the position of the fuel tank unit (internally mounted object) 51 is not precisely aligned above the opening 8.

《Other embodiments》
In each of the embodiments and modifications described above, the case where the loaded object according to the present invention is the fuel tank unit 51 has been described, but the loaded object is suspended from a crane 61 or the like and installed in the machine room 6. Any other device may be used as long as it is a device. For example, if the construction machine 10 is equipped with a large battery in the machine room 6, the battery may be mounted, and when removing a used battery and installing a charged battery, the battery may come into contact with the battery. A positioning member 70 or the like which guides the battery to the installation position inside the machine room 6 may be provided. Further, the fuel tank 55 of the fuel tank unit 51 is not limited to a hydrogen tank, and may be a gas tank filled with a gaseous fuel such as LP gas or a liquid tank filled with a liquid fuel such as light oil.

Further, in each of the embodiments and modifications described above, the positioning member 70 is composed of the seventh support 28g and the eighth support 28h of the guard frame 23. However, the positioning member 70 may be configured as a separate member from the guard frame 23. For example, the positioning member 70 may be composed of only the outer portion 71 and may be fixed to the guard cover 24 that constitutes the upper surface of the main body portion 21. As shown in FIG. 28g, the eighth pillar 28h, or the rear surface of the beam 29).

Further, as shown in FIG. 17, the positioning member 70 is configured to be replaceable by configuring the positioning member 70 as a separate member from the guard frame 23 and attaching it to the guard frame 23 with bolts 90. Good too. Since the positioning member 70 is brought into contact with the fuel tank unit (internally mounted object) 51 when the unit is installed (when the mounted object is installed), there is a possibility that the positioning member 70 may be damaged by repeatedly attaching and detaching the fuel tank unit 51. Therefore, as described above, by configuring the positioning member 70 separately from the guard frame 23 and configuring it to be replaceable, only the positioning member 70 can be replaced without disassembling the guard frame 23. Furthermore, the guard frame 23 may be configured to have higher rigidity than the positioning member 70. According to such a configuration, if the fuel tank unit (internally loaded object) 51 accidentally hits the positioning member 70, the positioning member 70 deforms, absorbing the impact and acting on the guard frame 23. Therefore, the guard frame 23 can also be protected.

Further, as shown in FIG. 18, the positioning member 70 is configured as a separate member from the guard frame 23, and is placed in an upper position where the outer portion 71 is located above the main body portion 21 (see the diagram on the right side of FIG. 18). ) and a lower position where the outer portion 71 is not located above the main body portion 21 (see the left-hand diagram in FIG. 18). The elevating mechanism for elevating and lowering the positioning member 70 may be other types, such as a hydraulic cylinder, a gear motor, a rack, or the like. According to such a configuration, the outer portion 71 of the positioning member 70 is positioned above the main body portion 21 only when necessary (when installing the unit) to serve as a mark when installing the fuel tank unit 51, and no mark is required. In such cases, unnecessary protrusions can be eliminated by housing the outer portion 71 inside the main body portion 21. Further, when positioning the positioning member 70 at a height position where it can be seen from a distance, the positioning member 70 may be moved to an upper position, and the length of the positioning member 70 in the vertical direction may be increased. There's no need. Furthermore, since the outer portion 71 can be housed inside the main body 21, the protruding height of the outer portion 71 is not limited to the height covered by the bonnet 22, and can be set to a height that is easily visible to the operator of the crane 61. Can be done.

Furthermore, in each of the embodiments and modifications described above, the positioning member 70 is provided at the front edge that borders the opening 8 of the main body 21; It is not limited to the edges. The positioning member 70 may be provided at a position where the guide portion contacts the outer shape of the fuel tank unit 51 in plan view, and may be provided at the rear edge of the opening 8, or may be provided at the left and right side edges of the opening 8. may be provided. Furthermore, when the fuel tank unit 51 is located at the center of the opening 8 away from the peripheral edge of the opening 8, the positioning member 70 may be provided at the center of the opening 8.

Further, in each of the above embodiments and modifications, the positioning member 70 is constituted by a rod-shaped member (post 28) extending in the vertical direction, but in Embodiments 1 and 7, it does not need to be a rod-shaped member, It may be composed of a plate-like member. Also in the second to sixth embodiments, a part of the plate member may be bent to form a recess or a protrusion, and the part of the plate member (recess or protrusion) may be used as the positioning member 70.

Furthermore, in each of the embodiments and modifications described above, an example has been described in which two positioning members 70 are provided on one side bordering the opening 8 of the main body portion 21, but the number of positioning members 70 is not limited to two, and one There may be one, or three or more. Furthermore, the plurality of positioning members 70 do not all need to be provided on one side bordering the opening 8, but may be provided at different positions (for example, either the front or rear side edges of the opening 8 or any of the left and right side edges). ) may be provided.

Further, in each of the embodiments and modifications described above, the holding member 56 is constructed of a case made of a steel plate or the like, but it may be of any other shape as long as it can hold the fuel tank 55. For example, it may be mesh-like.

Furthermore, the second positioning member 80 added to the construction machine 10 of the seventh embodiment is also applicable to the construction machines 10 of the second to sixth embodiments. When the second positioning member 80 is applied to Embodiments 2 to 6, when the unit is installed, the protrusion of the other fits into the recess formed in either the positioning member 70 or the fuel tank unit (internally mounted object) 51. By matching, displacement of the fuel tank unit 51 in the left-right direction is suppressed, and by the positioning member 70 and the second positioning member 80, displacement of the fuel tank unit 51 in the front-rear direction is suppressed. Therefore, the fuel tank unit 51 can be installed at the installation position with higher accuracy.

As explained above, the present invention is useful for construction machines.

1 Lower running body
3 Swivel frame
7 Counterweight (rear load)
8 Aperture
10 Construction machinery
20 Casing
21 Main body
51 Fuel tank unit (internally loaded items)
70 Positioning member
71 Outer part
72 Recess
74 Convex part
75 Lower widening section
77 Upper widening section
79 Inner part
80 Second positioning member

Claims (10)

a lower running body;
a swing frame rotatably provided on the lower traveling body;
A rear loading object provided at the rear part of the rotating frame;
A construction machine comprising: a removable internal load housed in a casing provided on the front side of the rear load on the revolving frame;
The casing has a main body portion that stores the internally loaded object and has an opening formed on the upper surface through which the internally loaded object can be taken in and taken out,
a positioning member provided at a position in contact with the outer shape of the internal load at a predetermined installation position in a plan view, extending in the vertical direction, and having a guide portion that allows sliding of the internal load in the vertical direction;
A construction machine, wherein the positioning member has an outer portion located above the main body. The construction machine according to claim 1,
The construction machine is characterized in that at least an upper end of the outer portion is located above an upper end of the rear mounting member. The construction machine according to claim 1,
The internal load has a recess extending in the vertical direction,
The guiding portion is a convex portion extending in the vertical direction that fits into the concave portion of the internal load, and with the convex portion fitted into the concave portion of the internal load, the internal load is guided into the opening. A construction machine, characterized in that the internal load is guided to the predetermined installation position by being lowered from above. The construction machine according to claim 1,
The internal load has a convex portion extending in the vertical direction,
The guiding portion is a recess extending in the vertical direction into which the convex portion of the internal load fits, and the internal load is guided into the opening with the convex portion of the internal load fitting into the recess. A construction machine, characterized in that the internal load is guided to the predetermined installation position by being lowered from above. The construction machine according to claim 3,
The construction machine is characterized in that the lower end of the recess is configured as a lower widening portion that becomes wider from the upper side toward the lower side. The construction machine according to claim 4,
The construction machine is characterized in that the upper end of the recess is configured as an upper widening portion that becomes wider from the lower side toward the upper side. The construction machine according to any one of claims 1 to 6,
A construction machine characterized in that a plurality of the positioning members are provided. The construction machine according to any one of claims 1 to 6,
The positioning member has an inner portion that extends downward continuously from a lower end of the outer portion,
The construction machine is characterized in that the guide portion is formed to extend from the outer portion to the inner portion. The construction machine according to any one of claims 1 to 6,
The positioning member is configured to be movable between an upper position where the outer portion is located above the main body and a lower position where the outer portion is not located above the main body. Featured construction machinery. The construction machine according to any one of claims 1 to 6,
A second positioning member extending in the vertical direction is provided at a position opposite to the positioning member across the opening of the main body,
The construction machine is characterized in that the second positioning member has at least an upper end formed into an inclined part that is inclined with respect to the vertical direction so as to be further away from the opening from the lower side to the upper side.