Construction machine

Abstract

To provide a construction machine that can improve visibility of a plurality of warning lights (revolving lights) provided on a vehicle body.SOLUTION: A hydraulic shovel 1 comprises a lower traveling body 2, an upper rotating body 3, a counterweight 7, and an exterior cover 13. A plurality of revolving lights 21, 22 are provided adjacently to each other at different heights on an upper surface of the exterior cover 13. That is, on the upper surface of the exterior cover 13, there are provided an upper revolving light 21 that is positioned at a predetermined height position via a rear bracket 23 as a support member, and a lower revolving light 22 that is adjacent to the upper revolving light 21 and positioned at a lower position than the upper revolving light 21. The rear bracket 23 has an opening 23F through which light of the lower revolving light 22 passes.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to construction machines such as hydraulic excavators. [Background technology]

[0002] For example, Patent Document 1 discloses a hydraulic excavator equipped with a rotating light to alert people in the vicinity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 60-45767 Summary of the Invention [Problem to be solved by the invention]

[0004] Hydraulic excavators, a typical example of construction machinery, may be equipped with multiple warning lights (revolving lights) on the vehicle body depending on the combination of options, such as whether or not the vehicle has a crane function. However, there are many restrictions on where the warning lights can be installed. For example, there are only a limited number of places on the vehicle body where warning lights can be installed, such as places that provide good visibility from around the vehicle. For this reason, when multiple warning lights are installed on the vehicle body, they may be installed adjacent to each other in the same location. However, in such cases, depending on the positions of people around the hydraulic excavator, the light of one warning light may be blocked by another warning light, reducing the visibility of the warning light.

[0005] An object of the present invention is to provide a construction machine capable of improving the visibility of a plurality of warning lights provided on the vehicle body. [Means for solving the problem]

[0006] The present invention preferably relates to a construction machine including a vehicle body to which a working implement is attached, a counterweight provided on the side of the vehicle body opposite the working implement, and an exterior cover covering on-board equipment arranged between the counterweight and the working implement, wherein at least one of an upper surface of the counterweight and an upper surface of the exterior cover are provided with an upper warning light that is positioned at a predetermined height via a support member, and a lower warning light that is adjacent to the upper warning light and positioned lower than the upper warning light, and the support member has an opening through which light from the lower warning light passes. Effect of the Invention

[0007] According to the present invention, it is possible to improve the visibility of a plurality of warning lights provided on a vehicle body, that is, the visibility of both the upper warning lights and the lower warning lights. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a left side view showing a hydraulic excavator according to an embodiment. [Diagram 2] FIG. 2 is a plan view of the hydraulic excavator in FIG. 1 as viewed from above. [Diagram 3] FIG. 2 is an enlarged plan view showing the right rear part of the upper rotating body. [Figure 4] FIG. 2 is a perspective view showing the right rear part of the upper rotating body. [Diagram 5] FIG. 5 is a front view seen from the direction A in FIG. [Figure 6] FIG. 5 is a rear view seen from direction B in FIG. [Figure 7] 1 is a right side view showing an upper warning light, a support member, a lower warning light, an exhaust port, a working device, etc. [Figure 8] FIG. 2 is a perspective view showing an upper warning light, a support member, and a lower warning light. [Figure 9] FIG. 11 is a perspective view showing a support member according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings, taking as an example a case where the embodiment is applied to a hydraulic excavator, which is a representative construction machine (work machine), and more specifically, a small hydraulic excavator.

[0010] In the following description, the front-to-rear direction of the hydraulic excavator 1 refers to the working device 4 side as the front side, and the counterweight 7 side opposite the working device 4 as the rear side. The left-to-right direction of the hydraulic excavator 1 refers to a direction perpendicular to the front-to-rear direction. For example, in FIG. 1, the left-to-right direction of the paper corresponds to the front-to-rear direction of the hydraulic excavator 1, the front-to-back direction of the paper corresponds to the left-to-right direction of the hydraulic excavator 1, and the up-to-down direction of the paper corresponds to the up-to-down direction of the hydraulic excavator 1.

[0011] Fig. 1 to Fig. 8 show an embodiment. In Fig. 1, a hydraulic excavator 1 as a construction machine (work machine) is used, for example, at work sites such as civil engineering, demolition, and underground construction. The hydraulic excavator 1 of the embodiment is configured as a small hydraulic excavator (mini excavator, small hydraulic excavator) (for example, machine weight is about 1 to 6 tons) suitable for work at a narrow work site. The hydraulic excavator 1 of the embodiment is configured as a cab-equipped hydraulic excavator 1.

[0012] The hydraulic excavator 1 comprises a self-propelled crawler-type lower traveling body 2, an upper rotating body 3 rotatably mounted on the lower traveling body 2, and a working device 4 provided on the upper rotating body 3. The lower traveling body 2 and the upper rotating body 3 constitute the body of the hydraulic excavator 1. The body is capable of traveling and rotating. The working device 4 is attached to the front side of the upper rotating body 3 so as to be able to swing up and down. The hydraulic excavator 1 can perform work such as excavating earth and sand using the working device 4.

[0013] The lower traveling body 2 is configured to include, for example, crawler belts 2A formed by attaching a plurality of shoes to endless track links, and left and right traveling hydraulic motors (not shown) that rotate the crawler belts 2A to travel the hydraulic excavator 1. A rotating device configured to include a rotating bearing and a rotating hydraulic motor is provided between the lower traveling body 2 and the upper rotating body 3.

[0014] The working device 4, also called a front device or a working machine, is provided on the front side of the revolving frame 5 so as to be swingable up and down. The working device 4 includes a boom 4A rotatably attached to the front side of the revolving frame 5, an arm 4B rotatably attached to the tip of the boom 4A, and a bucket 4C as a working tool rotatably attached to the tip of the arm 4B. The working device 4 also includes a boom cylinder 4D that rotates the boom 4A, an arm cylinder 4E that rotates the arm 4B, and a bucket cylinder 4F as a working tool cylinder that rotates the bucket 4C.

[0015] The upper rotating body 3 is rotatably mounted on the lower traveling body 2. The upper rotating body 3 rotates on the lower traveling body 2 by being driven by a hydraulic motor for rotation of the rotation device. Here, the width dimension in the left-right direction of the upper rotating body 3 is set to be equal to the vehicle width of the lower traveling body 2. As a result, the hydraulic excavator 1 is configured as a small rear swing type hydraulic excavator in which the rear surface 7A of the counterweight 7 fits within 120% of the vehicle width of the lower traveling body 2 when the upper rotating body 3 rotates on the lower traveling body 2.

[0016] The upper rotating body 3 includes, for example, a rotating frame 5 as a vehicle body frame, a cab box 6 having an operator's seat (not shown) therein, a counterweight 7 located behind the cab box 6, an engine 8 which serves as the prime mover of the hydraulic excavator 1, and an exterior cover 13 which covers the mounted equipment including the engine 8. The cab box 6 is formed as a box body which covers the operator's seat, and the inside of the cab box 6 serves as the operator's cab.

[0017] In the cab box 6, there is provided a driver's seat where an operator sits, as well as a travel lever / pedal (not shown) and a work lever (not shown) for operating the hydraulic excavator 1. By operating the travel lever / pedal and the work lever, the operator can perform travel using the lower traveling body 2, rotation of the upper rotating body 3, excavation using the work device 4, and the like.

[0018] The revolving frame 5 constitutes a support structure (base frame) for the upper revolving body 3. A counterweight 7, an engine 8, a hydraulic pump 9, a hydraulic oil tank 10, a fuel tank 11, a control valve unit 12, etc. are mounted on the revolving frame 5. In this case, the working device 4 is attached to the front side of the revolving frame 5, and the counterweight 7 is attached to the rear side of the revolving frame 5. In addition, an exterior cover 13 is provided on the revolving frame 5 to cover the various devices mounted on the revolving frame 5.

[0019] The counterweight 7 is provided at the rear end of the upper rotating body 3. That is, the counterweight 7 is provided at the rear end of the rotating frame 5 in order to balance the weight with the working device 4. The counterweight 7 is formed as an arc-shaped heavy object that extends in the left-right direction with the center in the left-right direction protruding rearward. As a result, the rear surface 7A of the counterweight 7 is formed as an arc surface that fits within an imaginary circle with a certain turning radius when the upper rotating body 3 turns.

[0020] The engine 8 is mounted on the revolving frame 5, located in front of the counterweight 7. The engine 8 is a prime mover that serves as a power source (drive source) of the hydraulic excavator 1. The engine 8 is formed of an internal combustion engine such as a diesel engine. Fuel for the engine 8 is stored in a fuel tank 11. Note that the prime mover may be formed of an engine and an electric motor, or an electric motor, in addition to the engine 8 serving as an internal combustion engine.

[0021] A hydraulic pump 9 driven by the engine 8 is attached to the right side, which is one end side of the engine 8. The hydraulic pump 9 sucks in hydraulic oil stored in a hydraulic oil tank 10, and discharges (supplies) the pressurized oil toward a control valve device 12. The hydraulic pump 9 supplies pressurized oil via the control valve device 12 to various hydraulic actuators (hydraulic cylinders, hydraulic motors) such as the boom cylinder 4D.

[0022] The control valve device 12 is a control valve group consisting of a plurality of directional control valves. The control valve device 12 supplies pressure oil discharged from the hydraulic pump 9 to a plurality of hydraulic actuators (hydraulic cylinders, hydraulic motors) such as the boom cylinder 4D in response to the operation of the travel lever / pedal and the work lever in the cab box 6. This enables the hydraulic excavator 1 to travel, swing, excavate, etc.

[0023] The exterior cover 13 is located around the cab box 6 and provided on the revolving frame 5. The exterior cover 13 covers devices (mounted devices, internal devices) such as a heat exchanger (not shown) mounted on the revolving frame 5, the engine 8, the hydraulic pump 9, and the control valve device 12. The exterior cover 13 is configured to include a top cover 13A, a right side cover 13B, and a front cover 13C. The top cover 13A is located on the rear side of the cab box 6 and covers the engine 8, the hydraulic pump 9, the heat exchanger, etc. from above.

[0024] The top cover 13A has an engine cover 13A1 that opens and closes in the vertical direction above the engine 8. The right side cover 13B covers the hydraulic pump 9 and the like from the side on the right side of the top cover 13A. The front cover 13C covers the control valve device 12 and the like in front of the hydraulic oil tank 10 and the fuel tank 11 and on the right side of the work implement 4 (boom 4A). A plurality of rotating lights 21, 22 are mounted on the top surface of the exterior cover 13. The rotating lights 21, 22 are warning lights that emit light to draw attention to the surroundings of the hydraulic excavator 1 (vehicle body).

[0025] Incidentally, when multiple rotating lights are mounted adjacent to each other on a vehicle body, if the rotating lights are lined up in positions where they can be mounted, the light of the rotating light may be blocked by another rotating light depending on the position of people around the hydraulic excavator, which may reduce the visibility of the rotating light. Therefore, in the embodiment, the mounting positions (mounting surfaces of the rotating lights) of adjacent rotating lights are arranged so that they do not overlap in the height direction (up and down direction). In addition, the support member that supports the rotating light at a high position is in an inverted U shape. In this case, the width of the support member is set to a size such that the light of the rotating light is not completely blocked from any direction of the vehicle body. In addition, adjacent rotating lights are arranged in a staggered manner so that the rotating light on the rear side of the vehicle body is higher than the rotating light on the front side of the vehicle body. Furthermore, the mounting surface of the rotating light is one step higher than the mounting surface of the engine muffler (exhaust port).

[0026] Thus, in the embodiment, adjacent rotating lights are staggered in height. In addition, the light of the rotating lights passes through an inverted U-shaped opening in the support member. This reduces the blind spot of adjacent rotating lights. Also, since the mounting surface of the rotating light is one step higher than the mounting surface of the engine muffler (exhaust port), the blind spot caused by the muffler (exhaust port) can also be reduced. Also, since the rotating light on the rear side of the vehicle body is higher than the rotating light on the front side of the vehicle body, interference with the hose of the working device, etc., can be suppressed when the working device is raised to the top. These points will be explained in detail below.

[0027] As shown in FIG. 3 and FIG. 4, the upper rotating body 3 is covered with an exterior cover 13. The top cover 13A of the exterior cover 13 has an openable and closable engine cover 13A1. On the top surface of the top cover 13A, on the right side of the engine cover 13A1 and on the front side closer to the working device 4 than the engine cover 13A1, an exhaust port 14 for discharging exhaust gas from the engine 8 is provided protruding from the top surface. The exhaust port 14 is a pipe body extending in the vertical direction, and an upper half of the exhaust port 14 is bent toward the right rear of the upper rotating body 3. The exhaust port 14 is also open toward the right rear of the upper rotating body 3. Two rotating lights 21, 22 are provided adjacent to the exhaust port 14 on the top surface of the top cover 13A.

[0028] Of the two rotating lights 21, 22, one rotating light 21 (22) notifies, for example, when the upper rotating body 3 is rotated relative to the lower traveling body 2. That is, one rotating light 21 (22) is a rotating warning rotating light (swing warning light) that rotates and lights up while the upper rotating body 3 is rotating, thereby notifying those around that the upper rotating body 3 is rotating. In contrast, the other rotating light 22 (21) notifies, for example, when crane work is performed using a crane hook (not shown) provided on a bucket link 4G that connects the arm 4B and bucket 4C of the working implement 4. That is, the other rotating light 22 (21) is a crane warning rotating light (crane warning light) that rotates and lights up while the working implement 4 is performing crane work (when the crane mode is selected), thereby notifying those around that the crane work is being performed.

[0029] The crane of the working implement 4 corresponds to an ML crane, that is, a crane equipped with a moment limiter (overload prevention device) that issues an alarm when the moment applied to the working implement 4 during crane operation exceeds an allowable value. Note that one of the rotating lights 21 (22) may be a crane alarm rotating light (crane warning light), and the other rotating light 22 (21) may be a swing alarm rotating light (swing warning light). Also, the rotating lights 21, 22 may be rotating lights (warning lights) other than the swing alarm rotating light (swing warning light) and the crane alarm rotating light (crane warning light).

[0030] Also, for example, one rotating light 21(22) and the other rotating light 21(22) can be the same color. In this case, the color of the rotating lights 21, 22 can be a desired color, such as red, yellow, green, etc. Also, the color of one rotating light 21(22) and the color of the other rotating light 21(22) may be different. Also, the rotation cycle of the rotating lights 21, 22 can be a desired cycle, such as high speed or low speed. The color and rotation cycle of the rotating lights 21, 22 can be set, for example, according to the purpose of the warning, standards, regulations, etc.

[0031] As shown in Fig. 3, the rotating lights 21 and 22 are disposed on the upper surface of the top cover 13A, to the right of the engine cover 13A1 and behind the exhaust port 14. In Fig. 3, the exhaust range 15, i.e., the range on the upper surface of the top cover 13A that receives exhaust from the exhaust port 14, is represented by a dot pattern. The rotating lights 21 and 22 are fixed at a position behind the exhaust port 14 and out of the direction in which the exhaust port 14 opens. In other words, the rotating lights 21 and 22 are positioned between the engine cover 13A1 and the exhaust range 15 on the upper surface of the top cover 13A.

[0032] The rotating lights 21, 22 are arranged side by side in the front-rear direction (vertical direction) of the upper rotating body 3. As shown in FIG. 3, the rotating lights 21, 22 and the exhaust port 14 are arranged in a line along an imaginary line XX extending in the front-rear direction of the upper rotating body 3. However, the imaginary line XX passing through the centers of the rotating lights 21, 22 is offset from the center of the exhaust port 14. In other words, the centers of the rotating lights 21, 22 and the exhaust port 14 are offset in the left-right direction. As shown in FIG. 4 to FIG. 8, the rotating lights 21, 22 are fixed to the upper surface of the top cover 13A via brackets 23, 24, respectively. The brackets 23, 24 are mounting brackets for mounting the rotating lights 21, 22 to the upper surface of the top cover 13A.

[0033] Of the brackets 23, 24 supporting the rotating lights 21, 22, respectively, the bracket 23 located on the rear side in the front-rear direction of the upper rotating body 3 is referred to as the "rear bracket 23", and the bracket 24 located forward of the rear bracket 23 is referred to as the "front bracket 24". The rear bracket 23 has a larger vertical dimension than the front bracket 24. As a result, the rear bracket 23 supports one rotating light 21 located on the rear side at a higher position than the other rotating light 22 located on the front side. Therefore, one rotating light 21 supported by the rear bracket 23 is referred to as the "upper rotating light 21", and the other rotating light 22 supported by the front bracket 24 is referred to as the "lower rotating light 22". In addition, the upper rotating light 21 is referred to as a rotating light for rotation warning (rotation warning light), and the lower rotating light 22 is referred to as a rotating light for crane warning (crane warning light).

[0034] 5 to 7, the top cover 13A of the exterior cover 13 has a reference surface 13A2 from which the exhaust port 14 protrudes, and an attachment surface 13A3 to which the brackets 23, 24 are attached at a position higher than the reference surface 13A2. In other words, the attachment surface 13A3 to which the brackets 23, 24 are attached is one step higher than the reference surface 13A2 from which the exhaust port 14 protrudes.

[0035] As shown in FIG. 8, the rear bracket 23 is formed by bending a single plate material into an inverted U-shape. The rear bracket 23 includes a pair of mounting plates 23A, 23B, a first vertical plate 23C, a second vertical plate 23D, and an upper plate 23E. The pair of mounting plates 23A, 23B are arranged parallel to each other and spaced apart from each other. The pair of mounting plates 23A, 23B are attached to the mounting surface 13A3 of the upper cover 13A. The first vertical plate 23C extends upward from an edge of one mounting plate 23A. The second vertical plate 23D extends upward from an edge of the other mounting plate 23B in parallel to the first vertical plate 23C.

[0036] The upper plate 23E is bridged between the upper edge of the first vertical plate 23C and the upper edge of the second vertical plate 23D, and connects the first vertical plate 23C and the second vertical plate 23D. The upper rotating light 21 is fixed to the upper plate 23E of the rear bracket 23. A cable 21A that supplies power to the upper rotating light 21 extends from the upper rotating light 21. One end of the cable 21A is provided with a connector 21B to which a cable (not shown) extending from the vehicle body side is connected. The connector 21B is fixed to the second vertical plate 23D of the rear bracket 23.

[0037] Similarly to the rear bracket 23, the front bracket 24 also includes a pair of mounting plates 24A, 24B, a first vertical plate 24C, a second vertical plate 24D, and an upper plate 24E. The lower rotating light 22 is fixed to the upper plate 24E of the front bracket 24. A cable 22A that supplies power to the lower rotating light 22 extends from the lower rotating light 22. One end of the cable 22A is provided with a connector 22B to which a cable (not shown) extending from the vehicle body side is connected. The connector 22B is fixed to the second vertical plate 24D of the front bracket 24. The first vertical plate 24C and the second vertical plate 24D of the front bracket 24 are shorter than the first vertical plate 23C and the second vertical plate 23D of the rear bracket 23.

[0038] That is, the first vertical plate 23C and the second vertical plate 23D of the rear bracket 23 are longer than the first vertical plate 24C and the second vertical plate 24D of the front bracket 24. This makes the rear bracket 23 larger in height than the front bracket 24. Therefore, the rear bracket 23 can support the upper rotating light 21 at a higher position than the lower rotating light 22, improving the visibility of the upper rotating light 21. The rear bracket 23 also has an opening 23F defined by the first vertical plate 23C, the second vertical plate 23D, and the upper plate 23E.

[0039] The opening 23F faces the lower rotating light 22. That is, the first vertical plate 24C and the second vertical plate 24D do not face the lower rotating light 22. For example, the first vertical plate 24C and the second vertical plate 24D are arranged parallel (including approximately parallel) to the imaginary line XX (FIG. 3) passing through the centers of the rotating lights 21, 22. Therefore, the light of the lower rotating light 22 passes through the opening 23F of the rear bracket 23. This improves the visibility of the lower rotating light 22.

[0040] That is, the adjacent rotating lights 21, 22 are stepped in the height direction. In addition, the rear bracket 23 supporting the upper rotating light 21 has an opening 23F. These prevent the light of the rotating lights 21, 22 from being blocked. In addition, the rotating lights 21, 22 are attached to the mounting surface 13A3, which is one step higher than the reference surface 13A2 from which the exhaust port 14 protrudes, via the brackets 23, 24. For this reason, if the height of the mounting surface 13A3 is H1, the height of the highest point of the exhaust port 14 is H2, the height of the highest point of the lower rotating light 22 is H3, and the height of the highest point of the upper rotating light 21 is H4, then H4>H3>H2>H1.

[0041] This allows the lower rotating light 22 and the upper rotating light 21 to be higher than the exhaust port 14, and prevents the rotating lights 21, 22 from being in the blind spot of the exhaust port 14. Furthermore, the front rotating light 22 is the lower rotating light 22 which is low in height, and the rear rotating light 21 is the upper rotating light 21 which is high in height. Therefore, as shown in Fig. 7, when the boom 4A of the working device 4 is rotated to the rearmost position, interference with the boom 4A and the members attached to the boom 4A can be suppressed.

[0042] Furthermore, the width dimensions of the first vertical plate 23C and the second vertical plate 23D of the rear bracket 23 can be, for example, equal to or smaller than the width dimensions (diameter dimensions) of the rotating lights 21, 22. In this case, the larger the width dimensions of the first vertical plate 23C and the second vertical plate 23D, the more the support strength of the upper rotating light 21 can be improved. For this reason, the width dimensions of the first vertical plate 23C and the second vertical plate 23D can be set to a size that can ensure both the support strength and visibility, for example.

[0043] Thus, according to the embodiment, the hydraulic excavator 1 as a construction machine includes the lower traveling body 2 and upper rotating body 3 as a vehicle body, the counterweight 7, and the exterior cover 13. The upper rotating body 3 has a working device 4 attached thereto. The counterweight 7 is provided on the rear side of the upper rotating body 3, i.e., on the opposite side to the working device 4. The exterior cover 13 covers the on-board equipment (engine 8, hydraulic pump 9, heat exchanger, control valve unit 12, etc.) that is disposed between the counterweight 7 and the working device 4.

[0044] In addition, as shown in Figs. 4 to 8, a plurality of rotating lights 21, 22 are provided adjacent to each other at different heights on the upper surface of the exterior cover 13. In the embodiment, two rotating lights 21, 22 are provided adjacent to each other in the front-rear direction on the upper surface of the exterior cover 13. That is, in the embodiment, the upper surface of the exterior cover 13 is provided with an upper rotating light 21 arranged at a predetermined height position via a rear bracket 23 as a support member, and a lower rotating light 22 arranged adjacent to the upper rotating light 21 and at a lower position than the upper rotating light 21. The predetermined height position can be, for example, a height position where the upper end of the upper rotating light 21 is higher than the upper end of the lower rotating light 22, and a height position where the visibility of the upper rotating light 21 can be ensured from the surroundings of the vehicle body. The rear bracket 23 has an opening 23F through which the light of the lower rotating light 22 passes. The opening 23F faces the lower rotating light 22.

[0045] The rear bracket 23 includes a first vertical plate 23C extending in the up-down direction, a second vertical plate 23D disposed at an interval from the first vertical plate 23C and extending in the up-down direction, and an upper plate 23E connecting the upper side of the first vertical plate 23C to the upper side of the second vertical plate 23D. The opening 23F is formed by the first vertical plate 23C, the second vertical plate 23D, and the upper plate 23E. For example, the first vertical plate 24C and the second vertical plate 24D are disposed parallel (including approximately parallel) to the imaginary line XX (FIG. 3) passing through the center of the rotating lights 21, 22.

[0046] The upper rotating light 21 is provided at a position farther from the base end of the working device 4 in the front-rear direction of the upper rotating body 3 (vehicle body front-rear direction) than the lower rotating light 22. The base end of the working device 4 corresponds to the mounting location of the boom 4A on the upper rotating body 3. The base end of the working device 4 is located below and in front of the upper surface of the counterweight 7 and the upper surface of the exterior cover 13 (respective rotating lights 21, 22). The mounted equipment covered by the exterior cover 13 is the engine 8, which is an internal combustion engine. The upper end of the lower rotating light 22 is higher than the upper end of the exhaust port 14 of the engine 8. That is, as shown in FIG. 7, when the height of the highest position of the exhaust port 14 is H2 and the height of the highest position of the lower rotating light 22 is H3, H3>H2. The upper end of the upper rotating light 21 is higher than the upper end of the lower rotating light 22. That is, when the height of the highest point of the upper rotating light 21 is H4, H4>H3. Furthermore, the height position H1 of the mounting surface 13A3 on the upper surface of the exterior cover 13 to which the rear bracket 23 is attached is higher than the height position H0 of the reference surface 13A2 to which the exhaust port 14 of the engine 8 protrudes from the exterior cover 13. That is, the mounting surface 13A3 to which the rear bracket 23 and the front bracket 24 are attached is located at a position higher than the reference surface 13A2 by the height dimension t.

[0047] The hydraulic excavator 1 according to the embodiment has the configuration described above. Next, its operation will be described.

[0048] For example, an operator sits in the driver's seat in the cab box 6 and starts the engine 8. When the engine 8 starts, the engine 8 drives the hydraulic pump 9. When the operator operates the travel lever / pedal, pressure oil is supplied from the hydraulic pump 9 via the control valve device 12 to the travel hydraulic motor of the lower traveling body 2. This allows the hydraulic excavator 1 to travel. When the operator operates the work lever, pressure oil is supplied from the hydraulic pump 9 via the control valve device 12 to the swing hydraulic motor, boom cylinder 4D, arm cylinder 4E, and bucket cylinder 4F. This allows the upper swing body 3 to swing while the work device 4 performs excavation work of earth and sand, etc.

[0049] Here, when the upper rotating body 3 is rotated, the upper rotating light 21, which is a rotating light for a rotation warning (swing warning light), rotates and lights up. This allows workers around the hydraulic excavator 1 to know that the upper rotating body 3 is rotating. Also, when a crane operation is performed by the working device 4, the lower rotating light 22, which is a rotating light for a crane warning (crane warning light), rotates and lights up. This allows workers around the hydraulic excavator 1 to know that a crane operation is being performed by the working device 4. At this time, the light of the lower rotating light 22 passes through the opening 23F of the rear bracket 23 that supports the upper rotating light 21 at a position higher than the lower rotating light 22. This improves not only the visibility of the upper rotating light 21 supported at a high position, but also the visibility of the lower rotating light 22 supported at a low position.

[0050] As described above, according to the embodiment, the upper rotating light 21, which is an upper warning light, is disposed at a predetermined height position via the rear bracket 23 as a support member. Therefore, the upper rotating light 21 can be supported at a high position by the rear bracket 23, and the visibility of the upper rotating light 21 can be improved. Moreover, since the rear bracket 23 has an opening 23F through which the light of the lower rotating light 22, which is a lower warning light, passes, the blind spot of the lower rotating light 22 caused by the rear bracket 23 can be reduced. This improves the visibility of the lower rotating light 22. As a result, the visibility of both the upper rotating light 21 and the lower rotating light 22 provided on the upper rotating body 3 can be improved.

[0051] In addition, the upper rotating light 21 and the lower rotating light 22 are arranged adjacent to each other. Therefore, for example, compared to a configuration in which two rotating lights are stacked one above the other, the height of the rotating light located at the top can be lowered. This improves the ease of mounting in locations with height restrictions. Also, compared to a configuration in which two rotating lights are unitized (integrated into a single component) above and below, when one rotating light breaks down, it is possible to replace only the broken rotating light. Moreover, the same rotating light can be used for both models equipped with one rotating light and models equipped with multiple rotating lights, and parts (rotating lights) can be shared among different models.

[0052] According to the embodiment, the rear bracket 23 includes a first vertical plate 23C, a second vertical plate 23D, and an upper plate 23E. Therefore, by fixing the upper rotating light 21 to the upper plate 23E of the rear bracket 23, the upper rotating light 21 can be stably supported at a high position. Moreover, the light of the lower rotating light 22 can pass through the opening 23F formed by the first vertical plate 23C, the second vertical plate 23D, and the upper plate 23E. This improves the visibility of the lower rotating light 22.

[0053] According to the embodiment, the upper rotating light 21 is provided at a position farther from the base end of the working device 4 in the front-rear direction of the upper rotating body 3 (vehicle body front-rear direction) than the lower rotating light 22. Therefore, as shown in Fig. 7, interference with the working device 4 can be suppressed. In other words, it is possible to improve the visibility of both the upper rotating light 21 and the lower rotating light 22 while ensuring a sufficient range of motion for the working device 4.

[0054] 7, the upper end (height position H3) of the lower rotating light 22 is higher than the upper end (height position H2) of the exhaust port 14 of the engine 8, and the upper end (height position H4) of the upper rotating light 21 is higher than the upper end (height position H3) of the lower rotating light 22. Therefore, a decrease in visibility due to the exhaust port 14 of the engine 8 can be suppressed.

[0055] According to the embodiment, the height position H1 of the mounting surface 13A3 on the upper surface of the exterior cover 13 to which the rear bracket 23 is attached is higher than the height position H0 of the reference surface 13A2 at which the exhaust port 14 of the engine 8 protrudes from the exterior cover 13. Therefore, from this point of view as well, it is possible to suppress a decrease in visibility due to the exhaust port 14 of the engine 8.

[0056] In the embodiment, the rear bracket 23 as a support member is made of a plate material. However, the present invention is not limited to this, and the rear bracket 31 as a support member may be made of a frame material, for example, as in the modified example shown in FIG. 9. That is, the modified rear bracket 31 includes a pair of mounting plates 31A, 31B, a first frame member 31C, a second frame member 31D, and an upper plate 31E. The pair of mounting plates 31A, 31B are arranged parallel to each other and spaced apart from each other. The first frame member 31C and the second frame member 31D, which are inverted U-shaped, are fixed to the upper surfaces of the pair of mounting plates 31A, 31B. The upper plate 31E is fixed to the upper parts of the first frame member 31C and the second frame member 31D.

[0057] Thus, according to the modified example, the rear bracket 31 as a support member includes a first frame member 31C, a second frame member 31D, and an upper plate 31E. The first frame member 31C has a pair of support columns 31C1, 31C1 extending in the vertical direction, and a connecting portion 31C2 connecting the upper sides of the pair of support columns 31C1, 31C1. The second frame member 31D has a pair of support columns 31D1, 31D1 extending in the vertical direction, and a connecting portion (not shown) connecting the upper sides of the pair of support columns 31D1, 31D1. The upper plate 31E is bridged between the connecting portion 31C2 of the first frame member 31C and the connecting portion of the second frame member 31D. The opening 31F is formed by the first frame member 31C, the second frame member 31D, and the upper plate 31E.

[0058] According to this modification, the upper rotating light 21 can be stably supported at a high position by fixing the upper rotating light 21 to the upper plate 31E of the rear bracket 31. Moreover, light from the lower rotating light 22 can pass through the opening 31F formed by the first frame member 31C, the second frame member 31D, and the upper plate 31E of the rear bracket 31. This improves the visibility of the lower rotating light 22.

[0059] In the embodiment, the warning lights that emit light around the hydraulic excavator 1 are the rotating lights 21, 22 that rotate. However, the warning lights are not limited to this, and various types of warning lights that use light to call attention to the surroundings, such as a flashing light, can be used.

[0060] In the embodiment, an example has been described in which two rotating lights 21, 22 are provided on the upper surface of the exterior cover 13. However, this is not limiting, and three or more warning lights may be provided. In this case, for example, a warning light that is higher than any of the multiple warning lights corresponds to an upper warning light, and a warning light that is lower corresponds to a lower warning light. A support member that supports the upper warning light from below has an opening through which light from the lower warning light passes.

[0061] In the embodiment, the rotating lights 21, 22 serving as warning lights are provided on the top cover 13A of the exterior cover 13. However, this is not limiting, and the warning lights may be provided, for example, on the top surface of a front cover constituting the exterior cover. That is, the exterior cover corresponds to a cover constituting the outer surface (surface) of the vehicle body. The warning lights can be provided on the top surface of such an exterior cover. That is, the warning lights can be provided on a top plate constituting the top surface of the vehicle body.

[0062] In the embodiment, the rotating lights 21, 22 serving as warning lights are provided on the upper surface of the exterior cover 13. However, this is not limiting, and warning lights may be provided on the upper surface of the counterweight. Also, warning lights may be provided on both the upper surface of the counterweight and the upper surface of the exterior cover. In other words, multiple warning lights can be provided adjacent to each other at different heights on at least one of the upper surfaces of the counterweight and the exterior cover.

[0063] In the embodiment, an example has been described in which the upper rotating light 21 as an upper warning light is provided at a position farther away from the work device 4 than the lower rotating light 22 as a lower warning light. However, this is not limiting, and the upper warning light may be provided at a position closer to the work device than the lower warning light depending on the space in the height direction, such as when the upper warning light does not interfere with the work device. Also, in the embodiment, the upper rotating light 21 and the lower rotating light 22 are provided side by side in the front-to-rear direction (vertical direction) of the upper rotating body 3, but they may be provided side by side in another direction, such as side by side in the left-to-right direction (horizontal direction) of the vehicle body.

[0064] In the embodiment, the hydraulic excavator 1 equipped with a mono-boom type working implement 4 has been described as an example. However, the present invention is not limited to this, and can be applied to hydraulic excavators equipped with other types of working implements (front implements), such as hydraulic excavators equipped with swing type working implements and hydraulic excavators equipped with offset type working implements. In addition, although the embodiment has been described as an example in which the working implement of the working implement 4 is the bucket 4C, a working implement equipped with another working implement, such as a crusher, may also be used.

[0065] In the embodiment, the hydraulic excavator 1 is described as a cab-type having a cab box 6. However, the present invention is not limited to this, and for example, a canopy-type hydraulic excavator may be used.

[0066] In the embodiment, a small hydraulic excavator 1 has been described as an example. However, the present invention is not limited to this, and may be applied to, for example, medium-sized or large hydraulic excavators that are larger than small hydraulic excavators. Also, although an example has been described in which the vehicle body is configured with the lower traveling body 2 and the upper rotating body 3, the vehicle body may not have a rotating body.

[0067] In the embodiment, the hydraulic excavator 1 equipped with a crawler-type undercarriage 2 has been described as an example. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator equipped with a wheel-type undercarriage. In addition, the present invention may be widely applied to various types of construction machines such as hydraulic cranes. [Explanation of symbols]

[0068] 1. Hydraulic excavator (construction machinery) 2 Undercarriage (car body) 3 Upper rotating body (car body) 4 Work equipment 7 Counterweight 8 Engine (equipment) 13 Exterior cover 13A2 Reference plane 13A3 Mounting surface 14 Exhaust port 21 Upper rotating light (upper warning light) 22 Lower rotating light (lower warning light) 23,31 Rear bracket (support member) 23C First vertical board 23D 2nd vertical plate 23E,31E Upper plate 23F,31F opening 31C First frame member 31C1,31D1 Post 31C2 Connection part 31D Second frame member

Claims

1. A vehicle body to which a working device is attached; A counterweight provided on the vehicle body on the opposite side to the working device; An exterior cover that covers mounted equipment disposed between the counterweight and the working device. an upper warning light that is disposed at a predetermined height position via a support member, and a lower warning light that is adjacent to the upper warning light and disposed at a lower position than the upper warning light, A construction machine characterized in that the support member has an opening through which light from the lower warning light passes.

2. The support member is A first vertical plate extending in the up-down direction; a second vertical plate disposed at an interval from the first vertical plate and extending in the up-down direction; An upper plate connecting an upper side of the first vertical plate and an upper side of the second vertical plate, 2. The construction machine according to claim 1, wherein the opening is defined by the first vertical plate, the second vertical plate, and the upper plate.

3. The support member is A first frame member including a pair of support columns extending in the vertical direction and a connecting portion connecting upper sides of the pair of support columns; a second frame member including a pair of support columns extending in the vertical direction and a connecting portion connecting upper sides of the pair of support columns; an upper plate spanning between the connecting portion of the first frame member and the connecting portion of the second frame member, 2. The construction machine according to claim 1, wherein the opening is defined by the first frame member, the second frame member and the upper plate.

4. 2. The construction machine according to claim 1, wherein the upper warning light is provided at a position farther from a base end of the working device in the longitudinal direction of the vehicle body than the lower warning light.

5. The on-board equipment is an internal combustion engine, an upper end of the lower warning light is higher than an upper end of the exhaust port of the engine; 2. The construction machine according to claim 1, wherein an upper end of the upper warning light is higher than an upper end of the lower warning light.

6. The on-board equipment is an internal combustion engine, 2. The construction machine according to claim 1, wherein a height position of a mounting surface on the upper surface to which the support member is attached is higher than a height position of a reference surface at which an exhaust port of the engine protrudes from the exterior cover.

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