JPH1181381A - Construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide construction equipment to facilitate an inspection work without having a wide space at the periphery in view of a real situation. SOLUTION: The fan belt winding parts of a working oil tank 64, a fuel tank 62, a battery 60, a radiator 68, and an engine 70 are arranged in the vicinity. An inspection port 94 is formed in an external facing panel 92 of an upper revolution body 30 is formed in such a way that each of the working oil tank 64, the fuel tank 62, the battery 60, the radiator 68, and the fan belt 76 forms a workable range. A cover 96 for inspection to open and close the inspection port 94 is coupled to the external facing panel 92 by a hinge. Further, first and second cover holding means 100 and 110 to hold the cover 96 for inspection at the inspection port 92 in two opening positioned different from each other are located between the external facing panel 92 and the cover 96 for inspection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine having a hydraulic oil tank, a fuel tank, a battery, a radiator, and an engine inside a base on which exterior parts are disposed.

[0002]

2. Description of the Related Art A construction machine represented by a hydraulic power shovel generally includes an upper revolving unit above a lower traveling unit provided with traveling means such as crawlers. The upper revolving superstructure
The work machine is supported so as to be able to move up and down via a bearing means, and various functional parts such as a hydraulic oil tank, a fuel tank, a battery, a radiator and an engine are provided therein, and through a turning mechanism such as a turning circle, It is possible to turn around the turning axis along the vertical axis within a range of 360 ° with respect to the undercarriage.

[0003] Usually, in this type of construction machine, the periphery of the upper revolving superstructure is covered by an exterior component such as a panel.
While preventing foreign matter such as earth and sand from easily invading the inside of the upper revolving body during the work, the outer part is provided with an inspection opening which is opened and closed by an inspection cover, so that the upper part can be turned from the outside through the inspection opening. It enables inspection work of various functional parts arranged inside the body.

For example, in Japanese Patent Application Laid-Open No. 6-193094, an inspection cover is provided on the upper surface of the upper revolving structure so as to be openable and closable, and the inspection cover is opened to externally provide the inside of the upper revolving structure. Inspection work of the fuel tank and the hydraulic oil tank which has been performed is enabled.
In the publication, a first inspection cover and a second cover are provided on the upper surface of an upper revolving structure so as to be openable and closable, and an engine and an exhaust device arranged inside the upper revolving structure from the outside by opening these inspection covers. Inspection work of pipes is made possible. Further, in Japanese Patent Application Laid-Open No. Hei 9-132924, inspection covers are openably and closably disposed on both sides of an upper revolving unit, and the inspection covers are opened to open the upper pivot from outside. Inspection work of the engine installed in the body machine room is enabled.

According to the construction machines disclosed in these prior arts, when the inspection cover is opened, inspection work is performed on a single type of functional component such as a tank or an engine. The inspection cover can be made as small as possible, and the space for opening and closing the inspection cover can be minimized. For example, even when the surrounding space is limited, the inspection cover can be used. There is an operational effect that the inspection work can be performed by fully opening the door.

In particular, in the construction machine disclosed in Japanese Patent Application Laid-Open No. 9-132924, two inspection covers are provided on each of the right and left sides of the upper revolving unit. Can be made smaller, and inspection work in a narrower place is also possible.

[0007]

By the way, the inspection work to be carried out on a construction machine on a daily basis is not limited to a single type of functional part, but is wound around a hydraulic oil tank, a fuel tank, a battery, a radiator and an engine. It must be applied to multiple functional components such as engine belts.

In such a case, in the above-mentioned conventional construction machine, by providing a dedicated inspection cover for each functional component, it is possible to inspect a plurality of functional components while maintaining a space advantage. Work can be performed.

However, in such a construction machine,
Before and after the inspection work, an operation of opening and closing a large number of inspection covers must be performed each time, which leads to complication of the inspection work.

In view of the above circumstances, an object of the present invention is to provide a construction machine capable of easily performing an inspection work without having a large space around the construction machine.

[0011]

According to the first aspect of the present invention, there is provided a construction machine including a hydraulic oil tank, a fuel tank, a battery, a radiator, and an engine inside a base on which exterior parts are disposed. The hydraulic oil tank, the fuel tank, the battery, the radiator and the engine belt winding portion of the engine are disposed in proximity to each other, and each of the hydraulic oil tank, the fuel tank, the battery, the radiator, and the engine belt is defined as a workable range. In addition to forming an inspection port in the exterior part in a manner to perform the above, the inspection cover for opening and closing the inspection port is hinged to the base, and further between these bases and the inspection cover, A cover holding mechanism for holding the inspection cover at at least two different opening positions. To have.

According to the first aspect of the present invention, by opening the inspection cover, the hydraulic oil tank, the fuel tank, the battery, the radiator, and the engine belt wound around the engine are inspected at once. Work can be performed, which is extremely advantageous in terms of workability.

In addition, since the opening of the inspection cover can be adjusted according to the surrounding conditions, the inspection can be performed even in a small place.

Here, as in the invention according to claim 2, the inspection cover is provided at the first opening position at which the fuel can be supplied to the fuel tank through at least the inspection port as the cover holding mechanism. A first cover holding means to be held, and a second opening position enabling inspection of the hydraulic oil tank, the fuel tank, the battery, the radiator, and the engine belt through the inspection opening, for the inspection. If the apparatus having the second cover holding means for holding the cover is applied, it is not necessary to fully open the inspection cover at the time of refueling, and it is possible to easily perform the operation at the time of refueling. Along with defining the fully opened position of the inspection cover, for example, it is possible to keep the fully opened inspection cover within the installation projected area of the construction machine, It is possible to perform the inspection work without having to worry about the space of the circumference.

In addition, since the first cover holding means and the second cover holding means only have to be prepared separately, each of the cover holding means can have a simple structure, and one of them can function. Even in the event that the situation disappears, it is possible to keep the inspection cover open by making the other function, which is advantageous in terms of reliability.

In the invention according to claim 3, the inspection cover has a shape in which a portion located on the front side of the base is lower than a portion located on the rear side, and has a lower front end portion. The base is arranged on the base in such a manner that it can be opened and closed about a horizontal axis, and the base supports a working machine so as to be able to move up and down via a support means, and the moving range of the working machine is checked by the inspection. A cover overlapping the opening / closing movement area of the cover, and the cover holding mechanism is configured to supply fuel to the fuel tank through at least the inspection port outside the movement range of the work implement. A first cover holding means for holding the inspection cover at the opening position is provided.

According to the third aspect of the present invention, when the inspection cover is opened and closed, it may interfere with the work machine supported on the base, but the first cover holding means operates. By doing so, it becomes possible to refuel the fuel tank without causing mutual interference between the work implement and the inspection cover.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing one embodiment. FIG. 1 and FIG.
1 schematically shows an embodiment of a construction machine according to the present invention. The construction machine exemplified here is applied when performing civil works such as excavation, earthworks, and earth removal at a construction site, and includes a lower traveling body 10 and an upper revolving superstructure (base) 30.
And

The lower traveling body 10 includes a track frame 11
A pair of left and right crawlers 12 are provided on both sides of the track frame 11, and an earthworking machine 20 is provided at the front end of the track frame 11. It is possible to perform traveling such as forward, backward, turning and turning via each crawler 12 by driving each traveling hydraulic motor (not shown). It is.

Each of the pair of crawlers 12 has an endless annular shape. The crawlers 12 are parallel to each other in a plan view, and the distance W between the outer edges thereof is smaller than the length L in the front-rear direction. It is wound between the crawler sprocket 13 and the crawler idler 14 arranged on both sides.

The earthworking machine 20 is suitable for performing operations such as earthwork and earth removal on the ground F on which the lower traveling body 10 is installed. A pair of blade arms 22 pivotally mounted on the front end of the track frame 11 via respective base ends in a horizontal manner so as to be able to move up and down, and a connection frame for connecting between the distal ends of the pair of blade arms 22 And a blade lift cylinder actuator 24 interposed between the front end of the track frame 11 and the blade lift cylinder actuator 24. The blade lift cylinder actuator 24 drives the blade 21 horizontally. It can be moved up and down around the horizontal axis as it is.

On the other hand, the upper turning body 30 of the construction machine is shown in FIG.
As shown in FIG. 3, a base plate 31 extending in the horizontal direction is provided at a base portion thereof, and a turning circle 40 is interposed between the base plate 31 and the track frame 11 of the lower traveling body 10. The turning circle 40 is provided above the lower traveling body 10.
By this operation, it is possible to make a turn around the turning axis α along the vertical axis within a range of 360 ° with respect to the lower traveling body 10. Although not explicitly shown in the drawing, the outer shape of the base plate 31 of the upper swing body 30 is the distance W from the swing axis α to the outer edge of one of the crawlers 12.
It is configured to be within a circumference having a radius of / 2 (hereinafter, simply referred to as a maximum turning circle).

As is apparent from the drawing, the upper revolving unit 30 is provided with a support means 50 at a position slightly deviated to the right from the median surface of the base plate 31, and the base plate 31 A battery 60, a fuel tank 62, a hydraulic oil tank 64, and a radiator reserve tank 66 are mounted on a portion of the upper surface of the supporter 50 located on the right side of the supporter 50, and further positioned rearward of the supporter 50 on the upper surface of the base plate 31. The engine 70 and the radiator 68 are mounted on the part where the engine 70 operates.

The support means 50 includes a pair of left and right vertical rib members 51 and 52 erected along the median surface of the base plate 31 in a manner parallel to each other, and the vertical rib members 51 and 52 face each other. The boom boss member 53 and the actuator boss member 54 are provided at the respective parts, and each boss member 53,
The function of supporting the offset type excavator 80 via the 54 so as to be able to move up and down is provided.

The offset type excavator 80 is suitable for performing a backhoe operation, that is, an operation for excavating a place lower than the ground F on which the lower traveling body 10 is installed.
As shown in FIG. 2, when the base end portion is arranged horizontally, the front end portion has a substantially L-shape bent downward, and the boom boss member 53 of the support means 50 is provided through the base end portion. A work boom 81 pivotally attached to the work boom 81, a work arm 82 pivotally attached to the tip of the work boom 81 so as to swing about a horizontal axis, and a work boom 81 Excavating bucket 8 pivotally mounted about a horizontal axis
The driving boom cylinder actuator 84 interposed between the bent portion of the working boom 81 and the actuator boss member 54 of the support means 50 drives the working boom with respect to the upper revolving unit 30. The work boom 81 can be moved up and down around a horizontal undulating axis, and driven by an arm cylinder actuator 85 interposed between the distal end of the work boom 81 and the base end of the work arm 82. On the other hand, the working arm 82 can be swung around the axis parallel to the above-mentioned undulating axis, and the base end of the working arm 82 and the excavating bucket 8
By driving the bucket cylinder actuator 86 interposed between the excavating bucket 3 and the excavating bucket 83, the excavating bucket 83 can be swung about the axis parallel to the above-described undulating axis.

In the offset type excavator 80, the above-described work boom 81 is divided into three parts from a base end side into a first boom part 81a, a second boom part 81b, and a third boom part 81c. 1st boom part 81a
By supporting a link rod (not shown) parallel to the second boom section 81b between the second boom section 81b and the link boom (not shown), A parallel link is formed between the boom section 81a and the third boom section 81c, and an offset cylinder actuator (not shown) is interposed between the base end of the second boom section 81b and the third boom section 81c. By driving the offset cylinder actuator (not shown), the work arm 82 and beyond can be offset to the left and right with respect to the first boom portion 81a without changing the direction of the excavating bucket 83. ,
For example, as clearly shown in FIG. 2, the boom cylinder actuator 84, the arm 82 cylinder actuator, the bucket cylinder actuator 86, and the offset cylinder actuator (not shown) are each appropriately driven to expand and contract, so that the work boom 81 and the work arm 82 are moved.
And each of the excavating buckets 83 can be arranged within the maximum turning circle described above.

Here, the offset type excavator 80
Has a portion whose moving range overlaps with the opening / closing moving range of the daily inspection cover of the upper revolving unit 30 described later. For example, as shown by a two-dot chain line in FIG. When the bucket cylinder actuator 86 is retracted in the disposed state, the excavating bucket 8
3 is arranged in the opening and closing movement area of the daily inspection cover.

As shown in FIG. 1, the pair of vertical rib members 51, 52 constituting the support means 50 are slightly longer than those on the left side, but are pivoted from the leading edge thereof. The distance to the center α is smaller than the distance from the pivot axis α to the rear edge of the base plate 31.

The battery 60, fuel tank 62, hydraulic oil tank 64, and radiator reserve tank 66 are shown in FIG.
As shown in FIG. 3, the base plate 31 extends in the extending direction of the above-described longitudinal rib members 51 and 52 in the order of the description.
Are arranged so as to approach each other from the front side to the rear side, and each has an inspection work site at an upper end portion. That is, as for the battery 60, a pair of terminals 60a to be connected to the cable and a liquid port plug 60b for replenishing the electrolytic solution are formed on the upper end surface thereof.
2. Regarding the hydraulic oil tank 64 and the radiator reserve tank 66, caps 62a, 64a, 66a for replenishing fuel, hydraulic oil, and coolant are provided on respective upper end surfaces.

The engine 70 has a drive pulley 71 connected to the crankshaft (not shown) and a cooling fan 72 mounted on the same vertical plane at a portion located on one end side of the crankshaft (not shown). Fan pulley 73
And an alternator pulley 75 attached to the alternator 74, and these three pulleys 71, 73,
A fan belt (engine belt) 76 is wound between the base plates 31, the axis of a crankshaft (not shown) is perpendicular to the median surface of the base plate 31, and the cooling fan 72.
Is mounted on the base plate 31 in such a manner as to be disposed immediately after the hydraulic oil tank 64. The alternator 74 described above is held movably with respect to the engine 70, and by changing its holding position, the other two
It is possible to move the axial center position of the alternator pulley 75 with respect to the axial centers of the two pulleys 71 and 73.

The radiator 68 is provided with the cooling fan 7 described above.
2 has a width slightly larger than the diameter of the cooling fan 72, and is arranged immediately after the hydraulic oil tank 64 with one side thereof being close to the cooling fan 72, and A radiator cap 68a for replenishing the coolant is provided.

As can be seen from the drawing, in this construction machine, the counterweight (exterior part) 90 is located around the base plate 31 at a position within the above-mentioned maximum turning circle.
And an exterior panel (exterior component) 92, and the battery 60, the fuel tank 62, and the hydraulic oil tank 6 described above are provided by the counterweight 90 and the exterior panel 92.
4. The radiator reserve tank 66, the engine 70, and the radiator 68 cover various functional components.

The counterweight 90 is a weight for balancing with the offset type excavator 80, and is mounted on a portion of the upper surface of the base plate 31 which is located further rearward than the engine 70. It covers the lower area.

The exterior panel 92 is formed by appropriately combining a plurality of resin parts and metal parts. The exterior panel 92 is provided with an inspection port 94 secured at a position located on the right side of the support means 50. The arrangement area of the means 50 and almost the entire area around the area excluding the movement area of the offset type excavator 80 supported by the support means 50 are surrounded by the above-described counterweight 90.

As shown in FIGS. 1 and 6, the inspection port 94 extends upward from the front upper area of the battery 60, and extends upward from the battery 60, above the fuel tank 62, and from the hydraulic oil tank. 64, the upper region of the reserve tank, and the region extending to the upper region of the radiator cap 68a. These batteries 60, the fuel tank 62, the hydraulic oil tank 64, the radiator reserve tank 66, and the radiator cap 68a are of course,
The inspection work can be easily performed while visually recognizing the fan belt 76 of the engine 70, and is normally completely closed by the resin-made daily inspection cover 96 under normal conditions.

The daily inspection cover 96 is inclined upward rapidly from the portion located in front of the battery 60 toward the rear, and the portion located rearward from the portion located above the fuel tank 62 is substantially horizontal. In the portion located in front of the battery 60, which is the lowest point, the outer periphery of the opening of the inspection port 94 in the exterior panel 92 is extended in the left-right direction of the upper swing body 30 via the hinge 98. It is connected so that it can be opened and closed around the horizontal axis centered along.

The cover 96 for daily inspection has two cover holding means 100 and 110 interposed between the cover 96 and the exterior panel 92.

As shown in FIG. 1, FIG. 4 and FIG. 5, the first cover holding means 100 starts from a portion of the exterior panel 92 which is located on the side of the hydraulic oil tank 64 at the periphery of the opening of the inspection port 94. An auxiliary bracket 101 protruding toward the inside of the inspection port 94;
Projecting upward from the upper surface of the
A rod bracket 102 having a horizontal support hole (not shown) along the front-rear direction of 0 and a base end bent at a right angle are inserted and held in a support hole (not shown) of the rod bracket 102. The support hole (not shown) is supported so as to be able to swing around the axis thereof, and the intermediate portion is provided with a hydraulic oil tank 64.
The locking rod 1 has a distal end bent at a right angle downward when it is arranged in a retracted state in which it is horizontal above, and a washer 103a for retaining the distal end is welded to the distal end.
03, a locking bracket 105 protruding downward from the rear end of the daily inspection cover 96, and having a locking insertion hole 104 with a larger diameter than the washer 103a at the center, and a hydraulic oil tank 64. A storage block 106 is provided on the upper surface and has a storage block 106 for detachably holding an intermediate portion of the locking rod 103 when the locking rod 103 is held in a stored state, as shown in FIG. As described above, when the locking rod 103 is disposed in the retracted state, the daily inspection cover 96 is allowed to close with respect to the inspection port 94, while the washer 103a of the locking rod 103 is provided as shown in FIG. When the cover is inserted through the lock insertion hole 104 of the lock bracket 105, the daily inspection cover 96 is held in a half-open state with respect to the inspection port 94.

Here, the half-opened state of the daily inspection cover 96 is determined by the length of the locking rod 103 and its position, and in the construction machine of the present embodiment, as shown in FIG. In addition, the rear edge of the daily inspection cover 96 occupies the upper region of the hydraulic oil tank 64, and the fuel can be supplied to the fuel tank 62 by operating at least the cap 62a of the fuel tank 62. Even when the offset type excavator 80 is arranged within the maximum turning circle and the bucket cylinder actuator 86 is retracted, the daily inspection cover 96 and the excavating bucket 96 are provided as shown by a two-dot chain line in FIG. 83 are set so as not to interfere with each other.

As shown in FIGS. 1, 6 and 7, the second cover holding means 110 is provided on the outer panel 92 at a position located above the battery 60 at the periphery of the opening of the inspection port 94. The first arm member 111 supported so as to be swingable about a horizontal axis along the left-right direction of the first arm member 30
And the first arm member 1 from the inner surface of the daily inspection cover 96.
Arm bracket 11 projecting toward the pivot axis of the arm 11
2 and the first arm member 111 are supported on the arm bracket 112 via the base end in a manner of swinging about the axis parallel to the swing axis of the first arm member 111, and the first arm is supported via the tip end. The first arm member 111 and the second arm member 1 are provided with a second arm member 113 supported on the distal end of the member 111, as shown in FIG.
13 are arranged in a bent state with respect to each other,
4, while the daily inspection cover 96 is allowed to close, as shown in FIG. 6, when the first arm member 111 and the second arm member 113 are linearly arranged with respect to each other, On the other hand, it has the function of holding the daily inspection cover 96 in the fully opened state.

Here, the fully opened state of the daily inspection cover 96 is determined by the total length of the first arm member 111 and the second arm member 113 and the arrangement position thereof. In the machine, as shown in FIG. 4, the rear edge of the daily inspection cover 96 occupies the front side beyond the upper region of the battery 60, and the inspection work is performed on the battery 60 disposed at the forefront. 1 and 2, and as shown in FIGS.
6 is set at a position where it does not protrude from either the front end or the rear end of the pair of crawlers 12 in the lower traveling body 10.

In the first cover holding means 100 and the second cover holding means 110, the locking rod 1
03, first arm member 111 and second arm member 11
Each of them is made of a rigid member such as a metal so as not to bend easily.

As shown in FIGS. 6 and 7, the second
A stopper 114 protruding toward the first arm member 111 is provided at a tip end of the arm member 113, and the first arm member 111 and the second arm member 113 are bent with their support portions facing downward. I try to prevent that.

Although not shown in the drawing, a lock means operable from outside the exterior panel 92 is interposed between the cover 96 for daily inspection and the exterior panel 92, and the lock means Locks each other in the closed state to restrict the careless opening of the daily inspection cover 96, and releases the daily inspection cover 96 when released.
Can be easily opened.

The exterior panel 92 also has an opening at a position above the counterweight 90, which is closed by the engine inspection cover 99.

Further, reference numeral 140 in FIGS.
Is a cabin disposed at a position located on the left side of the support means 50 in the upper swing body 30.

In the construction machine constructed as described above, with the daily inspection cover 96 and the engine inspection cover 99 closed respectively, the offset type excavating working machine 80 and the earth working machine 20 are driven to excavate. -Civil works such as earthworks and earth removal will be performed.

In this state, the periphery of the upper swing body 30 is covered with the counterweight 90, the exterior panel 92, and the inspection covers 96 and 99. Can be prevented as much as possible from entering the inside of the upper revolving unit 30, and it is possible to prevent various troubles caused by the intrusion of the foreign matter.

On the other hand, when the daily inspection work is to be performed on the construction machine, the daily inspection cover 96 is opened to the exterior panel 92 after the locking means is released, and the daily inspection cover 96 is fully opened. May be held.

In this state, the battery 60 and the fuel tank 6 disposed inside the upper revolving unit 30 are operated without opening and closing a large number of inspection covers as before.
2, hydraulic oil tank 64, radiator reserve tank 6
6. Perform inspection work at a time for each of the radiator 68 and the fan belt 76 wound around the engine 70. More specifically, for the battery 60, remove its liquid port plug 60b to replenish the electrolyte. Or a pair of terminals 60a
After confirming the degree of corrosion of the fuel tank, grinding is performed as needed, and the fuel tank 62, the hydraulic oil tank 64, the radiator reserve tank 66, and the radiator 68 are removed from their respective caps, and the corresponding fluid is supplied. Further, with respect to the fan belt 76, the tension is measured between the fan pulley 73 and the alternator pulley 75, and if necessary, the alternator 74 is moved to adjust the tension.
Inspection work such as checking for the presence or absence of a fray or a scratch can be performed, which facilitates the inspection work and is advantageous in terms of workability.

Moreover, even when the daily inspection cover 96 is held in the fully opened state, the second cover holding means 11
Since the cover 96 for daily inspection does not protrude from the front end or the rear end of the crawler 12, the inspection work can be performed without paying attention to the surrounding space.

Further, the first arm member 111 and the second arm member 1 for holding the daily inspection cover 96 in a fully opened state.
13 has a stopper 114 between each other and is not configured to be easily bent. For example, even when a gust blows during the inspection work or comes into contact with the outer surface of the daily inspection cover 96, The daily inspection cover 96
Can be prevented from being closed carelessly.

Further, in the construction machine described above, the daily inspection cover 96 can be held in a half-open state by operating the first cover holding means 100.
For example, even when installed in a small place such as indoors, or in a state where the offset type excavator 80 is arranged within the maximum turning circle, the daily inspection cover 96 and surrounding walls and roof, or the offset type excavator Not only can the inspection work be performed without causing a situation where the fuel tank 80 interferes with the fuel tank 80, but also the work of simply replenishing the fuel tank 62 with fuel becomes extremely easy.

Further, between the exterior panel 92 and the daily inspection cover 96, cover holding means 100 for holding the daily inspection cover 96 in a half-open state and cover holding means for holding the full-open state. 110, the respective cover holding means 100, 110
Each can be a simple configuration,
Even in the event that one of them becomes inoperable due to deformation or damage, the other can be operated to keep the daily inspection cover 96 open. This is advantageous.

In the above-described embodiment, the construction machine in which the inspection port and the inspection cover are provided on the upper revolving structure is illustrated. However, the present invention can be applied to other bases. Needless to say. In this case, the base does not necessarily need to be arranged so as to be pivotable, and a base that does not support the working machine may be applied. Note that, in the above-described embodiment in which the base on which the working machine is supported is an offset type excavating working machine, the working machine is not necessarily an offset type.

In the above-described embodiment, the cover holding mechanism is provided between the base panel and the exterior panel which is a component of the base. However, any other component constituting the base such as a frame member may be used. It may be provided between the two. The inspection cover is provided on the base in such a manner that a portion located on the front side of the base is lower than a portion located on the rear side, and the lower end of the front end is opened and closed around a horizontal axis. However, the shape and opening / closing direction of the inspection cover may be appropriately changed according to the arrangement of the hydraulic oil tank, the fuel tank, the battery, the radiator, and the engine belt disposed inside the base. Of course. However, when an offset type work machine is applied, the inspection cover preferably has the same shape and opening and closing direction as those of the above-described embodiment.

Further, in the above-described embodiment, the first cover for holding the inspection cover in a half-open state as the cover holding mechanism.
Although the cover holding mechanism of the present invention and the second holding means for holding in a fully open state are illustrated, it is sufficient if the cover holding mechanism of the present invention includes a means corresponding to the first holding means. is there. In the above-described embodiment in which the second holding means is provided, the case where the second holding means is formed of a rigid arm member is exemplified. However, it is possible to define the fully open position of the inspection cover. If it is not necessary to have rigidity, for example, a rope may simply be interposed between the inspection cover and the base.

Further, in the above-described embodiment where the first holding means and the second holding means are provided, individual ones are applied. However, as in the following modified example, The first holding means and the second holding means can be integrally formed. In the following modifications, the same components as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

That is, in the first modified example shown in FIG. 8, the locking rod 121 is swingably supported by the inspection cover 96, while a large number of locking insertion holes 1 are formed in the exterior panel 92.
The cover holding mechanism 120 is configured by arranging the locking bracket 123 having the bracket 22.

The cover holding mechanism 12 according to the first modification example
In the case of No. 0, by appropriately selecting the locking insertion hole 122 for inserting the locking rod 121 from among a large number of locking insertion holes 122 formed in the locking bracket 123,
4, the inspection cover 96 can be changed stepwise to a plurality of different opening positions.

In the second modification shown in FIG. 9,
Arm member 13 having long hole 131 in inspection cover 96
The cover holding mechanism 130 is configured by screwing the thumbscrews 133 to the exterior panel 92 through the elongated holes 131 while supporting the swinging member 2 in a swingable manner.

The cover holding mechanism 13 according to the second modified example
0, the arm member 132 in the elongated hole 131
By changing the fastening position of the thumb screw 133 with respect to the inspection port 94, the inspection cover 96 can be steplessly changed to a plurality of different opening positions with respect to the inspection port 94, that is, arbitrarily.

In each of the first and second modifications, the mounting manner of each of the elements 121, 123, 132, 133 in the cover holding mechanisms 120, 130 is determined on the inspection cover 96 side and the exterior panel 92 side. The same operation and effect can be expected when the above is reversed.

[Brief description of the drawings]

FIG. 1 is a plan view conceptually showing an embodiment of a construction machine according to the present invention, showing a state in which a working machine of an upper swing body 30 is removed.

FIG. 2 is an external side view of the construction machine shown in FIG.

FIG. 3 is a conceptual diagram showing a state where an inspection port is closed by an inspection cover in the construction machine shown in FIG.

FIG. 4 is a conceptual diagram showing a state in which an inspection port is held at a first opening position in the construction machine shown in FIG.

FIG. 5 is a view taken in the direction of arrow V in FIG. 4;

FIG. 6 is a conceptual diagram showing a state in which an inspection port is held at a second opening position in the construction machine shown in FIG.

FIG. 7 is a view taken along arrow VII in FIG. 6;

FIG. 8 is a conceptual diagram showing a first modification of the construction machine according to the present invention.

FIG. 9 is a conceptual diagram showing a second modification of the construction machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 30 ... Upper revolving body 50 ... Bearing means 60 ... Battery 62 ... Fuel tank 64 ... Hydraulic oil tank 68 ... Radiator 70 ... Engine 76 ... Fan belt 80 ... Offset type excavating machine 90 ... Counter weight 92 ... Exterior panel 94 ... Inspection port 96 ... inspection cover 98 ... hinge 100, 110, 120, 130 ... cover holding mechanism

Claims (3)

[Claims] 1. A construction machine comprising a hydraulic oil tank, a fuel tank, a battery, a radiator and an engine inside a base having exterior parts disposed around the hydraulic oil tank, the fuel tank, the battery, and the radiator. And an engine belt winding portion of the engine is disposed in close proximity to the hydraulic oil tank, the fuel tank, the battery, the radiator, and the engine belt. An inspection cover for opening and closing the inspection port is hinged to the base, and further between the base and the inspection cover, the inspection cover is at least two different opening positions with respect to the inspection port. A construction machine characterized by interposing a cover holding mechanism for holding. 2. The cover holding mechanism comprises: first cover holding means for holding the inspection cover at a first opening position enabling fuel supply to the fuel tank through at least the inspection port; Second cover holding means for holding the inspection cover at a second opening position enabling inspection work on the hydraulic oil tank, the fuel tank, the battery, the radiator, and the engine belt through an inspection port; The construction machine according to claim 1, further comprising: 3. The inspection cover has a shape in which a portion located on the front side of the base is lower than a portion located on the rear side, and opens and closes around a horizontal axis at a lower front end thereof. The base is arranged on the base, and the base supports the working machine via support means so as to be able to move up and down, and the moving range of the working machine overlaps with the opening and closing movement range of the inspection cover. The cover holding mechanism further includes the inspection cover at a first opening position that enables refueling of the fuel tank through at least the inspection port outside a moving range of the work machine. The construction machine according to claim 1, further comprising a first cover holding unit that holds the cover.