Construction machinery

Abstract

To provide a construction machine capable of arranging an antenna at a position apart from a driver seat while effectively using a limited space of a driving part.SOLUTION: A work machine provided with an antenna 52 for wireless communication arranged in a driving part 10 where a driving table 50 is a base part is provided with: a driving seat 17 arranged on the driving table 50; and a right side work operation lever 22 placed on one of left and right sides of the driving seat 17, wherein the antenna 52 is disposed at a position in front of the antenna 52 in a longitudinal direction and at a position inside of an edge end of the driving table 50 at an outside of the right side work operation lever 22 in right / left directions.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a construction machine provided with an antenna for performing wireless communication with the outside.

Background Art

[0002] In recent years, some construction machines such as excavation work machines are provided with an antenna for performing wireless communication with the outside such as a satellite or a base station. Conventionally, regarding the arrangement of the antenna in a construction machine, there is a configuration in which the antenna is arranged in the cab provided on the upper revolving body that is rotatably mounted with respect to the lower traveling body (for example, see Patent Document 1).

[0003] Patent Document 1 discloses a configuration in which, in a mini excavator which is a type of construction machine, a GPS (global positioning system) antenna capable of communicating with an external communication means is arranged inside the backrest part or the seating part of the driver's seat in the cab.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An antenna such as a GPS antenna is a device that transmits and receives relatively strong radio waves. Therefore, according to a configuration in which the antenna is arranged at a position close to a human body such as a driver's seat as in the configuration disclosed in Patent Document 1, for example, there is concern about the influence of the radio waves transmitted and received by the antenna on the human body.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a construction machine capable of arranging an antenna at a position away from the driver's seat while effectively utilizing the limited space of the operation unit. [Means for solving the problem]

[0007] The construction machine according to the present invention is a construction machine equipped with a wireless communication antenna provided on an operating section based on a driver's cab, comprising a driver's seat provided on the driver's cab, and an operating lever positioned on one side of the driver's seat, the antenna being positioned in front of the operating lever in the front-rear direction, and outside the operating lever and inside the edge of the driver's cab in the left-right direction.

[0008] In another aspect of the present invention, the construction machine is configured such that the antenna is located below a monitor positioned in front of the operating lever.

[0009] Another aspect of the present invention relates to a construction machine, wherein the construction machine includes an air conditioning duct having a front and rear extension that extends forward from the driver's seat along one of the left and right edges of the driver's cab in a plan view, and an upright portion that rises from the front and rear extension, and the antenna is positioned outside the upright portion in the left-right direction and below the upper end of the upright portion in the up-down direction.

[0010] In another aspect of the present invention, the construction machine is configured such that the monitor is positioned above the upright portion relative to the air conditioning duct, and the antenna is positioned so that at least a portion of it overlaps the monitor in a plan view.

[0011] In another aspect of the present invention, the construction machine is characterized in that the air conditioning duct has recesses that are indented on the left and right sides in the vertical direction of the upright portion, including the position where the antenna is located.

[0012] Another aspect of the present invention relates to a construction machine, wherein the construction machine is provided with a duct support frame that supports the air conditioning duct relative to the driver's cab, and the antenna is provided in a state that is supported by the duct support frame.

[0013] Another aspect of the present invention relates to a construction machine that includes an electrical component located below the antenna in the vertical direction and supported by the air conditioning duct.

[0014] In another aspect of the present invention, the construction machine is characterized in that the air conditioning duct has an inclined portion that slopes upward in a side view, serving as a support for the electrical components. [Effects of the Invention]

[0015] According to the present invention, the antenna can be positioned away from the driver's seat while effectively utilizing the limited space in the driver's compartment. [Brief explanation of the drawing]

[0016] [Figure 1] This is a left side view of an excavation machine according to one embodiment of the present invention. [Figure 2] This is a plan view of an excavation machine according to one embodiment of the present invention. [Figure 3] This is a left front perspective view of the driver's unit according to one embodiment of the present invention. [Figure 4] This is a plan view of the control unit according to one embodiment of the present invention. [Figure 5] This is a rear right perspective view of the driver's unit according to one embodiment of the present invention. [Figure 6] This is a right side view showing the configuration of an air conditioning duct and its surrounding area according to one embodiment of the present invention. [Figure 7] This is a partial cross-sectional plan view showing the configuration of an air conditioning duct and its surrounding area according to one embodiment of the present invention. [Figure 8] This is a right rear perspective view showing the support configuration of an antenna according to one embodiment of the present invention. [Figure 9] It is a partially cutaway cross-sectional plan view showing the air-conditioning duct and its surrounding structure according to an embodiment of the present invention. [Figure 10] It is a right rear perspective view showing the support structure of the relay box according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0017] In the present invention, in a configuration in which an antenna for wireless communication is provided on an operating platform that constitutes a base portion of an operating unit, by devising the arrangement of the antenna, a sufficient distance between the antenna and the driver's seat is ensured, and good maintainability for the antenna is obtained. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0018] In an embodiment of the present invention, as a construction machine according to the present invention, an excavating work machine (excavator) that is a swing work vehicle will be described as an example. However, the construction machine according to the present invention is not limited to the excavating work machine, and can be widely applied to other construction machines such as a bulldozer, a crane work machine, a compact track loader, a skid steer loader, a wheel loader, etc.

[0019] The overall configuration of the excavating work machine 1 according to the present embodiment will be described with reference to FIGS. 1 to 3. As shown in FIGS. 1 and 2, the excavating work machine 1 includes a traveling device 2 as a self-propelled traveling vehicle body, and an excavating device 3 and an earth discharging device 4 as working units attached to the traveling device 2.

[0020] The traveling device 2 is a part that forms the main body of the excavating work machine 1, and has a pair of left and right crawler-type traveling parts 5, 5, a machine body frame 6 as a base provided between the left and right traveling parts 5, 5, and a swing frame 7 provided on the machine body frame 6.

[0021] The running section 5 has a configuration in which tracks are wound around multiple rotating bodies such as sprockets and rollers supported by the machine frame 6. The running section 5 has a drive sprocket 5a, which is a drive wheel, at its rear end. The machine frame 6 has a center frame section 6a located in the middle between the left and right running sections 5, 5, and side frame sections 6b provided on both the left and right sides of the center frame section 6a.

[0022] Each running section 5 is equipped with a hydraulic motor 11 for driving. The hydraulic motor 11 is mounted on a predetermined part of the machine frame 6, such as the side frame portion 6b, in each running section 5, and is configured to rotate the drive sprocket 5a. The left and right hydraulic motors 11 drive the running sections 5, enabling the running device 2 to move forward and backward in a straight line and to turn left and right.

[0023] The slewing frame 7 is connected to the aircraft frame 6 via a slewing support section 8, which includes a slewing bearing, located on the upper side of the center frame section 6a, and is designed to slewing in either the left or right direction around its vertical axis. The slewing frame 7 rotates by the drive of a slewing motor (not shown), which is a hydraulic motor for rotation.

[0024] An operating unit 10 is provided on the slewing frame 7. A prime mover unit, including an engine 12 and other components, is provided at the rear of the slewing frame 7. To the right of the operating unit 10 is a tank housing 13 containing a fuel tank 14 and a hydraulic oil tank 15 (see Figure 2).

[0025] The driver's unit 10 is for operating the traveling device 2, the excavating device 3, and the soil removal device 4, and is located inside a cabin 20 that is provided on the slewing frame 7. The cabin 20 has a frame that forms its outer shape and a plurality of windows made of transparent material such as glass, and is generally constructed in a box shape. The cabin 20 has an opening and closing door 20a on the left side that opens and closes an entrance for the operator to enter and exit the driver's unit 10.

[0026] Inside the cabin 20, as shown in Figure 3, a driver's seat support base 16 is provided on the floor 9, and a driver's seat 17 is provided on the driver's seat support base 16. The driver's seat support base 16 is a hollow, box-shaped section, with a front section and left side section perpendicular to the floor 9, and the driver's seat 17. Installation It has a horizontal upper surface that forms a flat surface.

[0027] The driver's seat 17 has a seat surface 17a and a backrest 17b. In front of the driver's seat 17, a pair of left and right travel levers 18 are provided, extending upward from the floor 9. Multiple operating pedals 19 for work are provided on both the left and right sides of the left and right travel levers 18 on the floor 9. In addition, around the driver's seat 17, there is an operating panel section with various operating parts such as work operation levers for operating work parts such as the excavation device 3 and the soil removal device 4, as well as switches and other controls.

[0028] Regarding the operation section, a left-side operation lever 21 is provided on the left side of the driver's seat 17, and a right-side operation lever 22 is provided on the right side of the driver's seat 17. The excavation device 3 is operated by these left and right operation levers 21 and 22. Both the left-side operation lever 21 and the right-side operation lever 22 have their bases covered by bellows-shaped lever boots 21a and 22a, with rod-shaped gripping portions exposed above the lever boots 21a and 22a. These operation levers 21 and 22 are configured to be tiltable at least in the forward, backward, left, and right directions.

[0029] The right-side operation lever 22 is provided on the console section 23, which is located adjacent to the right side of the driver's seat 17. The console section 23 extends in the front-to-back direction, with the front-to-back direction as its longitudinal direction in a plan view. The right-side operation lever 22 is provided on the front end of the console section 23. The right-side operation lever 22 is located diagonally to the right and forward of the right front corner of the seat surface 17a of the driver's seat 17, which is roughly rectangular in a plan view. An operating part, such as a dial, is provided on the upper rear side of the console section 23.

[0030] The base end of the excavation device 3 is attached to the left and right center of the front end of the slewing frame 7. The excavation device 3 has a boom 31 that forms its base end, an arm 32 connected to the tip of the boom 31, and a bucket 33 attached to the tip of the arm 32. The excavation device 3 also has a boom cylinder 34 that rotates the boom 31, an arm cylinder 35 that rotates the arm 32, and a bucket cylinder 36 that rotates the bucket 33.

[0031] The base end of the boom 31 is supported by a boom support bracket 37. The boom support bracket 37 is supported by a bracket mounting portion 38 that protrudes from the left and right center of the front end of the slewing frame 7. The boom cylinder 34, arm cylinder 35, and bucket cylinder 36 that make up the excavation device 3 are all hydraulic cylinders that are operated by pressurized oil discharged by a hydraulic pump 25 (see Figure 2).

[0032] A soil removal device 4 is attached to the front of the machine frame 6. The soil removal device 4 includes a support frame 41 which includes a pair of left and right arms that extend in the front-rear direction between the left and right running sections 5, 5, a blade 42 which is a soil removal plate provided at the tip of the support frame 41, and a blade cylinder 43 which raises and lowers the blade 42 via the support frame 41. The blade cylinder 43 is a hydraulic cylinder that is operated by pressurized oil discharged by a hydraulic pump 25.

[0033] The support frame 41 is mounted to the aircraft frame 6 so as to be able to move up and down, with the rear ends of the left and right arms supported by support brackets provided on the front of the aircraft frame 6 so as to be able to move left and right with respect to the axis of rotation. The blade 42 is provided supported on the front end of the support frame 41. The blade cylinder 43 is provided mounted front to back between the aircraft frame 6 and the back of the blade 42.

[0034] The excavation work machine 1 has a lower traveling body consisting of a machine frame 6 and traveling sections 5, 5 supported on both its left and right sides, and an upper rotating body mounted on the lower traveling body so as to be rotatable. The upper rotating body consists of a rotating frame 7 and an operating section 10, engine 12, tank housing 13, etc., which are provided on the rotating frame 7.

[0035] In the excavation machine 1 having the above configuration, the desired operation and work are performed by an operator seated in the driver's seat 17, who appropriately operates the travel lever 18 and the control levers 21, 22, etc. Specifically, for example, by operating the left and right travel levers 18, the travel device 2 is moved forward and backward or turns left and right by operating the left and right travel sections 5. In addition, by operating the control levers 21, 22, excavation work is performed by the excavation device 3, or soil removal work and leveling work is performed by the soil removal device 4.

[0036] The excavator 1 is equipped with a communication device for wireless communication with external devices such as satellites and base stations. The communication device transmits and receives information to determine the position of the excavator 1 and to understand its operating status and condition. Specifically, the communication device has functions such as receiving radio waves from GPS satellites to determine the position of the excavator 1, and using mobile communication via communication satellites to mutually transmit various information about the excavator 1 (such as the rotational speed of the engine 12) with external base stations.

[0037] The communication device includes a communication device main unit 51 which constitutes the control unit, an antenna 52, and an antenna cable 53 which electrically connects the antenna 52 to the communication device main unit 51. The antenna 52 is, for example, a GNSS receiver (GNSS antenna) that receives radio waves from a constellation of GNSS satellites, or a GPS receiver (GPS antenna) that receives radio waves from GPS (Global Positioning System) satellites.

[0038] The communication device main unit 51, antenna 52, and antenna cable 53, which constitute the communication device, are arranged in predetermined positions in the driver's unit 10. In this embodiment, the communication device main unit 51, antenna 52, and antenna cable 53 are all located inside the cabin 20.

[0039] The communication device main unit 51 is positioned at the left end of the horizontal upper surface of the driver's seat support base 16 on which the driver's seat 17 is installed, and is located to the left of the driver's seat 17. The communication device main unit 51 has a flat, box-shaped exterior and is fixed to the upper surface of the driver's seat support base 16 by fasteners such as bolts, and is covered from above by a protective plate 54.

[0040] The antenna 52 is located near the right front corner of the driver's unit 10. The antenna 52 has a flattened cylindrical shape and is oriented so that its central axis (cylinder axis) is in the vertical direction.

[0041] The antenna cable 53 extends downward from the antenna 52, is routed towards the rear along the right edge inside the cabin 20, wraps around the rear of the driver's seat support base 16, and connects to the communication device main unit 51 located to the left of the driver's seat 17. In Figure 5, the wiring path of the antenna cable 53 is shown by a dashed line.

[0042] As described above, the excavation machine 1 is equipped with a wireless communication antenna 52 provided on the driver's cab 50, which forms the base of the driver's cab 10. The driver's cab 50 is a horizontal base portion that, including the floor portion 9, constitutes the base of the driver's cab 10, and has a roughly rectangular shape in plan view (see Figure 4). The driver's cab 50 constitutes the bottom surface of the cabin 20 that covers the driver's cab 10. The antenna 52 is positioned at a predetermined location on the driver's cab 50. The arrangement configuration of the antenna 52 and the surrounding configuration will be described below using Figures 3 to 10.

[0043] The excavation machine 1 includes a driver's seat 17 mounted on a driver's cab 50 via a driver's seat support base 16, and a right-side work operation lever 22 positioned on the right side of the driver's seat 17, which is one of the left and right sides of the driver's seat 17. In this configuration, the antenna 52 is positioned diagonally to the right and in front of the driver's seat 17 in a plan view. Specifically, the antenna 52 is positioned in front of the right-side work operation lever 22 in the front-rear direction, and outside the right-side work operation lever 22 and inside the edge of the driver's cab 50 in the left-right direction.

[0044] As shown in Figure 4, in the front-to-back direction, the antenna 52 is positioned such that its entirety is in front of the front end position P1 of the right-side work operation lever 22. The front end position P1 of the right-side work operation lever 22 is, for example, the front end of the lever's range of motion, or the front end of the lever boot 22a. In other words, the antenna 52 is positioned in front of the area where the right-side work operation lever 22 is positioned, including its range of motion, in the front-to-back direction. Note that it is sufficient for at least a portion of the antenna 52 to be positioned in front of the right-side work operation lever 22 in the front-to-back direction.

[0045] In the left-right direction, the antenna 52 is positioned so that its entirety lies within a range D1 between the right end position P2, which is the outer (right) end of the right-side operation lever 22, and the right edge position P3 of the driver's cab 50. The right end position P2 of the right-side operation lever 22 is, for example, the right end of the lever's range of motion, or the right end of the lever boot 22a. In other words, in the left-right direction, the antenna 52 is positioned to the right of the area where the right-side operation lever 22 is positioned, which includes the range of motion of the right-side operation lever 22. Note that in the left-right direction, it is sufficient for at least a portion of the antenna 52 to be positioned within the range D1.

[0046] Furthermore, the excavation machine 1 is equipped with a cabin 20 that covers the driver's cab 50 (see Figure 1). In this configuration, the antenna 52 is positioned between the right-side operation lever 22 and the right-side wall portion 20b, which is the right side wall portion of the cabin 20, in the left-right direction (see Figure 4).

[0047] The right side wall portion 20b of the cabin 20 forms a vertical surface on the right side of the cabin 20, with its thickness generally oriented in the left-right direction. In this embodiment, the right side wall portion 20b is positioned in approximately the same position as the right edge of the driver's cab 50 in the left-right direction, so as to be aligned with the right edge of the driver's cab 50 in a plan view. However, the positional relationship of the right side wall portion 20b with respect to the right edge of the driver's cab 50 is not limited, and the right side wall portion 20b may be positioned outside (right side) or inside (left side) of the right edge of the driver's cab 50.

[0048] As described above, the antenna 52, located to the right of the right-side work operation lever 22 on the driver's cab 50 in the left-right direction, is positioned to the left of the right-side wall 20b of the cabin 20. In other words, in the left-right direction, the antenna 52 is positioned so that its entirety lies within a range D2 between the right end position P2 of the right-side work operation lever 22 and the position P4 on the left side of the right-side wall 20b.

[0049] Therefore, in a configuration with a cabin 20, the antenna 52 is located to the right of the area where the right-side work operation lever 22 is positioned, which includes the range of motion of the right-side work operation lever 22, and is located inside the cabin 20. The antenna 52 only needs to be positioned such that at least a portion of it is within the range D2 in the left-right direction.

[0050] Furthermore, the antenna 52 is provided attached to an air conditioning duct 60 installed inside the cabin 20 of the excavation machine 1. The air conditioning duct 60 is provided to an air conditioning unit (not shown) installed in the excavation machine 1. The air conditioning unit is a device configuration that forms the indoor unit of an air conditioning system that provides heating and cooling to the interior of the cabin 20, and together with a condenser unit (not shown) which is an outdoor unit, it constitutes an air conditioning system.

[0051] The air conditioning unit is installed inside the hollow driver's seat support base 16 and is located below the driver's seat 17. The air conditioning unit includes a heat exchanger, which includes an evaporator and a heater core, and a blower fan that supplies air to the heat exchanger. The air conditioning unit installed inside the driver's seat support base 16 has the left side of the driver's seat support base 16 as the intake side for outside air and the right side of the driver's seat support base 16 as the discharge side for air conditioning. A vent 16a for intake of outside air is provided on the left side of the driver's seat support base 16 (see Figure 3).

[0052] The air conditioning duct 60 is a duct for sending conditioned air obtained from the air conditioning unit into the cabin 20, and is mainly composed of resin components. The conditioned air is cold air generated by the evaporator of the heat exchanger, which is pressurized and sent through the air conditioning duct 60 by a compressor (not shown) and blown out into the cabin 20 from multiple outlets.

[0053] The air conditioning duct 60 is provided to communicate with the storage space for the air conditioning unit in the driver's seat support base 16 from the right side. In a plan view, the air conditioning duct 60 extends forward from the right side of the driver's seat support base 16 and is provided to follow the inside of the right side wall portion 20b of the cabin 20. The air conditioning duct 60 has a duct shape and includes a front and rear extension portion 61 that forms the rear of the air conditioning duct 60, and an upright portion 62 provided in front of the front and rear extension portion 61 that forms the front of the air conditioning duct 60.

[0054] The front and rear extensions 61 are duct portions that extend forward from the driver's seat 17 along the right edge of the driver's cab 50 in a plan view. The front and rear extensions 61 are approximately the same height as the driver's seat support base 16 and have a roughly rectangular cylindrical outer shape with the front and rear direction as the longitudinal direction, and are provided along the top of the driver's cab 50. The rear end of the front and rear extensions 61 is joined to the right side of the driver's seat support base 16, which is the discharge side of the air conditioning unit, and is connected to the storage space of the air conditioning unit.

[0055] The upright portion 62 is a duct portion that rises from the front and rear extension portion 61. The upright portion 62 includes an inclined portion 63 that extends diagonally upward and forward from the front end of the front and rear extension portion 61, and an upright main body portion 64 that rises from the front side of the inclined portion 63 at a steep angle relative to the inclined portion 63.

[0056] The inclined portion 63 is a part that is arranged in an inclined manner along a substantially straight line so as to be inclined at a predetermined angle (for example, about 40°) with respect to the horizontal direction when viewed from the side. The upright main body portion 64 has a gently curved shape with the front side (right side in Figure 6) being the convex side when viewed from the side, and the shape of the front part of the upright portion 62 is such that it curves upward from the front side of the inclined portion 63. The upright portion 62 has a shape when viewed from the side that rises gradually in an inclined manner from the rear side to the front side by the inclined portion 63, and the front part rises relatively sharply by the upright main body portion 64.

[0057] The air conditioning duct 60 has multiple outlets, including a first outlet 71 located on the left and right inner sides (left side) of the front and rear extension portion 61, and a second outlet 72, a third outlet 73, and a fourth outlet 74 located in the upright main body portion 64.

[0058] The first air outlet 71 is a foot-level air outlet positioned to direct airflow towards the feet of the operator seated in the driver's seat 17. The second air outlet 72 is positioned to direct airflow towards the upper body or head of the operator seated in the driver's seat 17. The second air outlet 72 is located on the end face of a cylindrical section 65 that has a cylindrical outer shape and branches outwards inwards to the left and right, and diagonally upward and rearward, within the upright main body 64 of the air conditioning duct 60, while facing the driver's seat 17. Both the first air outlet 71 and the second air outlet 72 have circular openings. Each of the first air outlet 71 and the second air outlet 72 is provided with airflow adjustment louvers 71a and 72a, which have circular outer shapes corresponding to the openings.

[0059] The third air outlet 73 is located in the upper and lower middle section of the upright main body 64, facing inward to the left and right. The fourth air outlet 74 is located above the third air outlet 73 and is provided at the upper end of the upright main body 64, facing inward to the left and right and diagonally upward and forward. Both the third air outlet 73 and the fourth air outlet 74 have a rectangular opening shape. Each of the third air outlet 73 and the fourth air outlet 74 is provided with airflow adjustment louvers 73a and 74a, which have a rectangular outer shape corresponding to the opening shape.

[0060] The air conditioning duct 60 is provided with a cover member 77, which serves as a duct cover and primarily covers the upright portion 62 of the air conditioning duct 60. The cover member 77 is a resin plate-shaped member having a predetermined covering shape corresponding to the outer shape of the air conditioning duct 60, and covers almost the entire upright main body portion 64 of the air conditioning duct 60, except for the right side facing the right side wall portion 20b of the cabin 20. Together with the upright portion 62 of the air conditioning duct 60, the cover member 77 constitutes the upright portion of the duct, the duct upright portion 78. The cover member 77 has openings corresponding to the positions of the first outlet 71, the second outlet 72, the third outlet 73, and the fourth outlet 74, and is provided so that each outlet faces the outside.

[0061] In the configuration described above, the antenna 52 is positioned outside the upright portion 62 of the air conditioning duct 60 in the left-right direction, and below the upper end of the upright portion 62 in the up-down direction.

[0062] As shown in Figures 7 and 8, in the left-right direction, the antenna 52 is positioned on the outside (right side) in the left-right direction relative to the upright main body 64 which forms the front of the upright portion 62. The antenna 52 is positioned on the right side of the upright main body 64, in a plan view, so that it largely overlaps the inclined right side surface 64a formed on the upright main body 64. As a result, the antenna 52 is positioned so that it largely overlaps the upright portion 62 of the air conditioning duct 60 in a plan view.

[0063] The inclined right side portion 64a is the lower right side portion of the upright main body portion 64, and in a front view, it is a surface that is gradually inclined from the bottom to the top, from the left and right outer (right side) to the left and right inner (left side). The inclined right side portion 64a is smoothly continuous with the upper side of the right side portion 63a of the inclined portion 63 of the air conditioning duct 60.

[0064] In the vertical direction, the antenna 52 is positioned so that its entirety is below the upper end position Q1 of the upright body portion 64 of the upright portion 62 (see Figure 6). The upper end of the upright body portion 64 is the upper corner portion 64b of the rectangular fourth air outlet 74 formed at the upper end of the upright body portion 64. The antenna 52 is positioned approximately in the center in the vertical direction with respect to the upright body portion 64.

[0065] The air conditioning duct 60, which positions the antenna 52 on the right side of the upright main body 64, has recesses 66 that are indented on the left and right sides in the upright main body 64, in the portion of the upright part 62 that includes the position of the antenna 52 in the vertical direction of the upright main body 64. The recesses 66 are formed by a smoothly continuous concave surface on the upper side of the inclined right side surface 64a.

[0066] The recess 66 is formed in a curved concave shape in plan view, located on the right side of the upper half of the upright main body 64, in a portion including the branching portion of the cylindrical portion 65 relative to the upright main body 64 (see Figure 9). The concave surface forming the recess 66 has the rear upper surface portion 67a of the upright main body 64 and the right side surface portion 67b of the cylindrical portion 65, and in a right side view, it is formed in a portion that is roughly "Y" shaped, following the branching shape of the upright main body 64 and the cylindrical portion 65.

[0067] As described above, the antenna 52, positioned to the right of the upright main body portion 64 of the air conditioning duct 60, is supported by a duct support frame 80 erected on the driver's cab 50. The duct support frame 80 has a lower frame portion 81, which is made up of a lower frame member and forms the lower half of the duct support frame 80, and an upper frame portion 82, which is made up of an upper frame member and forms the upper half of the duct support frame 80. Note that the duct support frame 80 is not shown in Figure 5.

[0068] The frame members forming the lower frame section 81 and the upper frame section 82 are longitudinal members with their vertical direction of extension. They are arranged in series and fixed to each other by welding or other means, forming an integrated columnar duct support frame 80. The duct support frame 80 is erected in a substantially vertical manner as a whole, with its upper end positioned at approximately the same height as the upper end of the air conditioning duct 60.

[0069] The duct support frame 80 has right side portions 81a and 82a in the lower frame portion 81 and upper frame portion 82, with the left-right direction being the thickness direction and the front portions 81b and 82b in the front-rear direction being the thickness direction. The right side portions 81a and 82a and the front portions 81b and 82b are formed as a portion that is roughly "L" shaped in a plan cross-sectional view, and are formed over a range that extends substantially over the entire duct support frame 80 in the vertical direction.

[0070] The duct support frame 80 has a fixed surface portion 83 at the lower end of the lower frame portion 81. The fixed surface portion 83 is a plate surface portion that is perpendicular (horizontal) to the extension direction of the duct support frame 80. The fixed surface portion 83 includes an inner portion that is bent at a right angle from the lower end of the right side surface portion 81a of the lower frame portion 81 toward the left and right inward (left side), and an outer portion that protrudes toward the front from the lower side of the front portion 81b.

[0071] The duct support frame 80 is fastened and fixed in two places to a horizontal support surface portion 50a formed on the right front side of the driver's cab 50 by a fixing surface portion 83 and fixing bolts 84 that are screwed into nuts 85 that pass through the support surface portion 50a (see Figure 6). The support surface portion 50a of the driver's cab 50 is a portion that protrudes from most of the rest of the driver's cab 50 and is provided as the upper surface of a support base portion 50b that is roughly trapezoidal in shape when viewed from the right side.

[0072] The duct support frame 80 has a widened section 81c at the lower end of the lower frame section 81, which is wider (in the front-to-back direction) than the rest of the upper part of the lower frame section 81. The duct support frame 80 is secured to the air conditioning duct 60 by fixing bolts 86 at the widened section 81c.

[0073] The fixing bolt 86 penetrates the support projection 68 of the air conditioning duct 60 from the left side and is screwed into a cylindrical boss portion 69 protruding from the inside (left side) of the wide portion 81c, thereby fastening and fixing the air conditioning duct 60 to the duct support frame 80 (see Figure 8). The support projection 68 is the fixing portion of the air conditioning duct 60 to the duct support frame 80, and is formed as a plate-shaped projection portion with the plate thickness direction approximately in the left-right direction, so as to protrude downward from the lower side of the front end of the inclined portion 63.

[0074] As described above, in the duct support frame 80 which is erected on the driver's cab 50 and fixed to the air conditioning duct 60 and used to support the air conditioning duct 60, an antenna support plate 87 for supporting the antenna 52 is provided at the lower part of the upper frame portion 82. The antenna support plate 87 is a horizontal plate-shaped portion and is provided on the inside of the upper frame portion 82, which has a roughly "L" shaped cross-section formed by the right side portion 82a and the front portion 82b.

[0075] The antenna support plate 87 is provided by fixing a plate-shaped member having a predetermined shape to the right side portion 82a and the front portion 82b by welding or the like. The antenna support plate 87 has a straight right side portion 87a in the front-to-back direction that follows the inside of the right side portion 82a, a straight front side portion 87b in the left-to-right direction that follows the inside of the front portion 82b, and an arc portion 87c that follows the arc shape as edges that form the outer shape in plan view. The antenna support plate 87 has an irregular circular shape (approximately teardrop shape) in plan view, with the right side portion 87a, the front side portion 87b and the arc portion 87c having a right-angle corner on the right front side (see Figure 9). The antenna support plate 87 has an outer shape that is slightly larger than the antenna 52, which has a circular outer shape in plan view.

[0076] The antenna 52 is mounted on the antenna support plate 87 and fixed to the antenna support plate 87 by fasteners such as screws. The antenna support plate 87 has a through-hole 87d to avoid interference with the antenna cable 53 extending from the lower surface of the antenna 52 (see Figure 9). The opening 87d is formed as a portion that is cut out in a straight line from the center of the antenna support plate 87 toward the rear.

[0077] The duct support frame 80 supports a monitor 90 located in the operating unit 10 inside the cabin 20 of the excavation work machine 1. The monitor 90 is a display device that shows various conditions and statuses of the excavation work machine 1 to the operator. The monitor 90 has a roughly rectangular plate shape and has a rectangular display screen 91 and a plurality of operation buttons 92 located below the display screen. The monitor 90 is, for example, a liquid crystal monitor with touch panel functionality and is connected to a control unit (not shown) in the excavation work machine 1 by a monitor cable 93 (see Figure 6) extending from the rear side. The control unit controls the display content of the monitor 90. Note that the monitor 90 is not shown in Figure 8.

[0078] The monitor 90 is positioned in front of the right-side operation lever 22 and is fixed to a monitor support plate portion 88 provided at the upper end of the duct support frame 80. The monitor support plate portion 88 is provided as a bent portion formed at the upper end of the upper frame member constituting the upper frame portion 82. The monitor support plate portion 88 is bent inward to the left and right from the upper end of the portion forming the right side surface portion 82a of the upper frame portion 82. The monitor support plate portion 88 has a roughly "H" shaped plate form due to its four corners (left and right sides) and intermediate portions connecting these sides (see Figure 8). The upper part of the right side is connected to the upper end of the right side surface portion 82a.

[0079] The monitor support plate 88 is positioned so that its surface is parallel to the display screen 91 of the monitor 90, according to the orientation of the monitor 90's display screen. The monitor support plate 88 supports and fixes the monitor 90 from the rear side, supporting the monitor 90 from the rear side. The monitor 90 is located diagonally to the right and in front of the driver's seat 17. death The display screen 91 is positioned so that it faces the operator seated in the driver's seat 17, with the display screen 91 angled diagonally upward to the left. The monitor support plate 88 is provided at an angle corresponding to the orientation of the monitor 90.

[0080] The monitor 90 is fixed to the monitor support plate 88 at its four corners, which have a roughly rectangular outer shape, by fasteners 89 such as bolts (see Figure 6). The fasteners 89 are screwed into bosses 90a that protrude from the back side of the case portion of the monitor 90, passing through the monitor support plate 88. Holes 88a are formed at the four corners of the monitor support plate 88 for the fasteners 89 to pass through (see Figure 8). In the monitor support plate 88, the lower recess 88b of the roughly "H" shaped outer shape is used to avoid interference with the monitor cable 93.

[0081] As described above, the monitor 90, supported at the upper end of the duct support frame 80, is positioned above the upright main body portion 64 of the upright portion 62 in relation to the air conditioning duct 60. More specifically, in the left-right direction, the monitor 90 is positioned near the right side of the upright main body portion 64, overlapping a portion of the portion that forms the fourth air outlet 74 together with the corner portion 64b that forms the upper end of the upright main body portion 64. Also in the left-right direction, the monitor 90 is positioned so that approximately half of the left side overlaps with the cylindrical portion 65 formed at the top of the upright main body portion 64.

[0082] Furthermore, in the front-to-back direction, the monitor 90 is positioned so that its entirety is located behind the front end position R1 of the air conditioning duct 60 (see Figure 7). The front end position R1 of the air conditioning duct 60 is the position of the front end of the front upper corner 64c of the area where the fourth air outlet 74 is formed in the upright main body 64.

[0083] The antenna 52 is positioned below the monitor 90 so that, in relation to the monitor 90, at least a portion of it overlaps with the monitor 90 in a plan view. In this embodiment, the antenna 52 is positioned and supported at the lower part of the upper frame portion 82 and is provided in the upper and lower intermediate part of the duct support frame 80, while the monitor 90 is positioned and supported at the upper end of the duct support frame 80. As a result, the antenna 52 is located below the monitor 90.

[0084] Furthermore, the antenna 52 is positioned so that, in a plan view, almost its entirety overlaps the monitor 90. Specifically, as shown in Figure 7, the antenna 52, positioned below the monitor 90, occupies almost its entire circular shape, excluding the front end, within the plan view outline of the monitor 90. In other words, in a plan view, the antenna 52 is positioned such that, in relation to the monitor 90, the front end of its circular shape extends forward from the monitor 90.

[0085] As described above, the duct support frame 80 that supports the antenna 52 and the monitor 90 is positioned entirely within the space between the cover member 77 and the right side wall 20b of the cabin 20, and is hidden from the outside along with the air conditioning duct 60. The cover member 77 has a notch 77a that follows the roughly rectangular outer shape of the monitor 90 and is open on the right side (see Figure 5), and the monitor 90 is fitted into the notch 77a, so that the monitor 90 faces the outside.

[0086] Furthermore, a relay box 100, which is an example of the electrical components of the excavation work machine 1, is supported by the air conditioning duct 60. The relay box 100 has a roughly rectangular parallelepiped shape. The relay box 100 is a case that houses multiple relays that constitute the electrical system for the electrical components of the excavation work machine 1 (for example, electromagnetically controlled control valves, various sensors such as hydraulic oil temperature sensors, engine starter motors, etc.). Electrical wiring (not shown) is connected to each relay inside the relay box 100.

[0087] The excavation machine 1 is equipped with two relay boxes 100A and 100B, which have substantially the same external shape and dimensions, as a relay box 100. The two relay boxes 100 are positioned above the inclined section 63 of the air conditioning duct 60. In a plan view, the two relay boxes 100 are arranged in series with a gap 101 between them, with their longitudinal direction oriented in the front-to-back direction and their longitudinal direction aligned with the inclination of the inclined section 63. The two relay boxes 100 are supported by the air conditioning duct 60 via a support plate 102 and a support frame 103.

[0088] The support plate 102 is positioned on the right side of the inclined portion 63 of the air conditioning duct 60, with its thickness oriented approximately in the left-right direction, and is positioned to cover the front-to-rear intermediate portion of the right side surface 63a of the inclined portion 63 from the right side. The support plate 102 is fixedly supported to the support base portion 50b of the driver's cab 50 and is also fixed to the inclined portion 63 of the air conditioning duct 60, thereby supporting the air conditioning duct 60 with respect to the support base portion 50b of the driver's cab 50.

[0089] The support plate 102 has a shape at its lower end that conforms to the support surface 50a of the driver's cab 50 and the downward-sloping inclined surface 50c formed behind the support surface 50a. The inclined surface 50c has the same or substantially the same inclination as the inclined portion 63 of the air conditioning duct 60 when viewed from the side. In other words, the inclined surface 50c is provided so as to be parallel to the inclined portion 63 when viewed from the side.

[0090] The support plate 102 has a fixed surface portion 104 at the front of its lower end that is in contact with the support surface portion 50a, and a fixed surface portion 105 at the rear of its lower end that is in contact with the inclined surface portion 50c (see Figure 6). These fixed surfaces 104 and 105 are formed as right-angled bent surfaces on the left and right inward (left side) relative to the main body portion of the support plate 102.

[0091] The support plate 102 has its fixed surface portion 104 overlapping the rear of the support surface portion 50a from above, and the fixed surface portion 104 is fastened and secured to the support surface portion 50a with a fixing bolt 106. The fixing bolt 106 passes through the fixed surface portion 104 and the support surface portion 50a and is screwed into a nut 107. The support plate 102 also has its fixed surface portion 105 overlapping the inclined surface portion 50c from above, and the fixed surface portion 105 is fastened and secured to the inclined surface portion 50c with a fixing bolt 108. The fixing bolt 108 passes through the fixed surface portion 105 and the inclined surface portion 50c and is screwed into a nut 109.

[0092] The support plate 102 has a support surface portion 112 that extends upward from the inclined portion 63 of the air conditioning duct 60 when viewed from the side. The support surface portion 112 is the portion of the support plate 102 that protrudes upward from the inclined upper surface portion 63b of the inclined portion 63, and is a rectangular region whose longitudinal direction is along the inclination of the inclined portion 63. The inclined upper surface portion 63b, together with the right side surface portion 63a, forms a straight ridge portion 63c along the inclination of the inclined portion 63.

[0093] The support plate 102 is fixed to the air conditioning duct 60 by fixing bolts 115 at the support surface portion 112. The fixing bolts 115 pass through the support projection portion 116 of the air conditioning duct 60 from the left side and are screwed into a nut portion 118 provided on the right side of the support surface portion 112, thereby fastening and fixing the air conditioning duct 60 to the support surface portion 112. The support projection portion 116 is the fixing portion of the air conditioning duct 60 to the support plate 102, and is formed as a plate-shaped projection portion with the thickness direction approximately in the left-right direction, so as to protrude upward. The support projection portion 116 is provided at two locations, the front and rear of the inclined portion 63, along the ridge portion 63c on the right edge of the inclined upper surface portion 63b. In other words, the support plate 102 is fixed to the air conditioning duct 60 at two locations, front and rear, by fixing bolts 115, etc.

[0094] The support frame 103 is a plate-shaped member having a predetermined shape, and includes a straight base portion 121 having a predetermined width, a plurality of engaging projections 122 projecting upward from the base portion 121 in a direction perpendicular to the extension direction of the base portion 121, and a support arm portion 123 extending from the front end of the base portion 121 in the same direction as the engaging projections 122 (see Figure 10). The support frame 103 has a roughly comb-like shape due to the base portion 121, the plurality of engaging projections 122, and the support arm portion 123. The support frame 103 is positioned so that the base portion 121 is aligned with the upper edge of the support surface portion 112 of the support plate 102, and most of the base portion 121 is fixed to the inside (left side) of the support surface portion 112 by welding or the like. height It is.

[0095] The support frame 103 engages with the relay box 100 by inserting multiple engaging projections 122 into the engaged portions 110 provided on the right side of each relay box 100, thereby supporting the relay box 100 with respect to the support plate 102. The engaged portions 110 have insertion holes into which the rectangular plate-shaped engaging projections 122 are inserted. Each relay box 100 is provided with engaged portions 110 at two locations, front and rear, and each relay box 100 is supported by the engaging projections 122 at these two locations.

[0096] The two relay boxes 100 are provided with protective plates 125 that partially cover them from above and to the left. The protective plates 125 are provided to cover the entire top surface and most of the left side surface of the front relay box 100B, and to cover a portion of the front of the top surface and left side surface of the rear relay box 100A.

[0097] The protective plate 125 is fastened and secured at its upper surface 125a to the left-side bent surface 123a of the support arm portion 123 of the support frame 103 by bolts 126 and nuts (not shown). The protective plate 125 is also fastened and secured at two points, top and bottom, by bolts 128 to the support stay 127 provided in the gap 101 between the front and rear relay boxes 100 by bolts 128. Each bolt 128 is screwed into a cylindrical boss portion 127a of the support stay 127.

[0098] As described above, the excavation machine 1 equipped with two relay boxes 100 has the following arrangement in relation to the antenna 52 and the relay boxes 100. That is, the relay boxes 100 are located below the antenna 52 in the vertical direction and are supported by the air conditioning duct 60.

[0099] As shown in Figure 6, the two relay boxes 100, which are arranged in series at an angle in a side view, are both located below the height position S1 of the antenna support plate 87 that supports the antenna 52 in its mounted state. In other words, the height position S2 of the upper end of the front relay box 100B, which is located on top, is below the height position S1 of the antenna support plate 87, and the two relay boxes 100 are positioned so that their entirety is below the antenna 52.

[0100] Furthermore, the air conditioning duct 60 has an inclined section 63 that slopes upward in a side view, serving as a support for the two relay boxes 100. The inclined section 63 is fixed to support plates 102 at two support projections 116 at the front and rear, and the two relay boxes 100 are fixed and supported in a series configuration along the inclination of the inclined section 63 via the support plates 102 and support frames 103. Therefore, the two relay boxes 100 are arranged and supported in a series configuration above the inclined upper surface 63b of the inclined section 63, with an inclination angle similar to that of the inclined section 63 (for example, about 40°) in the horizontal direction when viewed from the side.

[0101] In this embodiment, a relay box 100 is shown as an example of an electrical component supported by the air conditioning duct 60, but any electrical component supported by the air conditioning duct 60 can be an electrical component of the excavation work machine 1. Examples of electrical components of the excavation work machine 1 include various electrical and electronic devices such as batteries, controllers, and converters.

[0102] With the arrangement of the antenna 52 in the excavation work machine 1 according to this embodiment described above, the antenna 52 can be positioned away from the driver's seat 17 while making effective use of the limited space in the driver's unit 10.

[0103] In the control unit 10, the antenna 52 is positioned in front of the right-side operation lever 22, outside (to the right) of the right-side operation lever 22, and inside the edge of the control panel 50. With this configuration, the antenna 52, which is a device that transmits and receives relatively strong radio waves, can be installed at a distance from the operator seated in the control seat 17, thereby reducing the impact of the radio waves transmitted and received by the antenna 52 on the operator's body.

[0104] Furthermore, the antenna 52 is positioned between the right-side operation lever 22 and the right-side wall portion 20b of the cabin 20. With this configuration, the antenna 52 can be positioned away from the driver's seat 17 while effectively utilizing the limited space within the cabin 20. In particular, in this embodiment, the antenna 52 is positioned adjacent to the inner wall surface of the right-side wall portion 20b of the cabin 20, in close proximity to it. In addition, the antenna 52 has a portion that directly faces the right-side wall portion 20b of the cabin 20, that is, a portion that does not have any object interposed between it and the right-side wall portion 20b. With this configuration, the antenna 52 can be positioned away from the driver's seat 17 while effectively utilizing the limited space within the cabin 20.

[0105] Furthermore, the antenna 52 is positioned below the monitor 90, which is located in front of the right-side operation lever 22. With this configuration, the space below the monitor 90 can be effectively utilized while positioning the antenna 52 away from the driver's seat 17.

[0106] Furthermore, the antenna 52 is positioned on the outside (right side) of the upright portion 62 of the air conditioning duct 60 provided in the driver's unit 10, and below the upper end of the upright portion 62. With this configuration, the space on the left and right outer sides of the air conditioning duct 60 can be effectively utilized, and the antenna 52 can be positioned away from the driver's seat 17. In addition, by having the air conditioning duct 60 function as a shielding part from the driver's seat 17, the impact of radio waves transmitted and received by the antenna 52 on the operator's body can be reduced.

[0107] Furthermore, the monitor 90 is positioned on top of the duct upright section 78, which includes the air conditioning duct 60 and the cover member 77, and the antenna 52 is positioned so that at least a portion of it overlaps the monitor 90 in a plan view. With this configuration, the antenna 52 can be positioned away from the driver's seat 17 while making effective use of the space around the monitor 90, which is on the left and right outer sides of the air conditioning duct 60.

[0108] Furthermore, since the antenna 52 and the monitor 90 can be placed in close proximity to each other, good maintainability and ease of assembly can be obtained for these electrical components. Specifically, for example, by removing the cover member 77, the antenna 52 and the monitor 90 can be easily accessed, thereby improving the efficiency of maintenance work on these electrical components.

[0109] Also, on the left and right outer sides of the upright portion 62 of the air conditioning duct 60 Antenna 52In this configuration, the air conditioning duct 60 has recesses 66 on the left and right inner (left side) of the upright section 62 on the side where the antenna 52 is positioned. With this configuration, the space on the left and right outer sides of the upright section 62 can be efficiently used as space for positioning the antenna 52, space for maintaining the antenna 52, space for working when attaching or detaching the antenna 52, etc.

[0110] Furthermore, the excavation machine 1 is equipped with a duct support frame 80 that supports the air conditioning duct 60 relative to the operator's cab 50, and the antenna 52 is mounted in a state supported by the duct support frame 80. With this configuration, the structure for supporting the air conditioning duct 60 can also be used to support the antenna 52, thus simplifying the structure for supporting the antenna 52 and allowing effective use of the space on the left and right outer sides of the air conditioning duct 60. In addition, since the duct support frame 80 is a robust frame structure that supports the relatively large air conditioning duct 60, it can firmly support the antenna 52.

[0111] Furthermore, two relay boxes 100, positioned below the antenna 52, are supported by a support plate 102 and a support frame 103 in the air conditioning duct 60. With this configuration, the antenna 52 and the relay boxes 100 can be placed close to each other, allowing these electrical components to be grouped together in an easily accessible location, thus providing good maintainability and ease of assembly for these electrical components. In addition, the space around the air conditioning duct 60 can be effectively utilized as space for the relay boxes 100.

[0112] Furthermore, the air conditioning duct 60 has an inclined portion 63 that slopes upward in a side view, serving as a support for the relay box 100. With this configuration, the space above the inclined portion 63 of the air conditioning duct 60 located in the operating unit 10 can be used as space for the relay box 100, allowing for efficient use of the space in the operating unit 10. The number of relay boxes 100 supported by the air conditioning duct 60 may be one or three or more.

[0113] As described above using the embodiments, the construction machinery according to the present invention is not limited to the embodiments described above, and various forms can be adopted within the scope consistent with the spirit of the present invention.

[0114] In the embodiment described above, the excavation work machine 1 has a cabin configuration with a cabin 20 covering the driver's unit 10. However, the construction machine according to the present invention is not limited to a cabin configuration. For example, it may have a canopy configuration with a roof supported by multiple pillars or the like, or it may have a configuration that does not have either a cabin or a canopy and exposes the driver's unit.

[0115] Furthermore, in the embodiment described above, the antenna 52 is located at the right end of the driver's unit 10, but the antenna 52 may also be located at the left end of the driver's unit 10. In this case, the antenna 52 is located in front of the left-side work operation lever 21 in the front-rear direction, and outside (to the left) of the left-side work operation lever 21 in the left-side direction, and inside the edge of the driver's cab 50, in relation to the left-side work operation lever 21 located on the left side of the driver's seat 17.

[0116] This technology can take the following configurations. Note that the configurations described below can be selected and combined as desired.

[0117] (1) A construction machine equipped with a wireless communication antenna located on the driver's cab, A driver's seat provided on the aforementioned driver's cab, The vehicle is equipped with an operating lever located on one side of the driver's seat, The antenna is positioned in front of the operating lever in the front-to-back direction, and outside the operating lever and inside the edge of the driver's cab in the left-to-right direction. A construction machine characterized by the following features. (2) The aforementioned antenna is located below the monitor, which is positioned in front of the operating lever. The construction machine described in (1) above, characterized in that it is a construction machine. (3) In a plan view, the air conditioning duct has a front-to-rear extension that extends forward from the driver's seat along one of the left and right edges of the driver's cab, and an upright portion that rises from the front-to-rear extension. The antenna is positioned outside the upright portion in the left-right direction and below the upper end of the upright portion in the upright direction. The construction machinery according to (1) or (2) above, characterized in that (4) The monitor is positioned above the upright portion of the air conditioning duct. The antenna is positioned so that at least a portion of it overlaps the monitor in a plan view. The construction machine described in (2) above, characterized in that (5) The air conditioning duct has recesses that are indented on the left and right sides in the vertical direction of the upright portion, including the position where the antenna is located. The construction machinery according to (3) or (4) above, characterized in that (6) The driver's cab is equipped with a duct support frame that supports the air conditioning duct, The antenna is provided in a state where it is supported by the duct support frame. A construction machine according to any one of (3) to (5) above, characterized by the above. (7) The electrical components are provided, which are located below the antenna in the vertical direction and are supported by the air conditioning duct. A construction machine according to any one of (3) to (6) above, characterized in that it is a construction machine. (8) The air conditioning duct has an inclined portion that slopes upward when viewed from the side, which serves as a support for the electrical components. The construction machine described in (7) above, characterized in that it is a construction machine. [Explanation of symbols]

[0118] 1. Excavation equipment (construction machinery) 10. Driver's Unit 17 Driver's seat 20 cabins 20b Right side wall (side wall) 22 Right-side operation lever (operation lever) 50 Driver's cab 52 Antennas 60 Air conditioning ducts 61 Front and rear extensions 62 Standing part 63 Slope 64 Standing main body 66 recesses 80 Duct support frame 90 monitors 100 Relay Box (Electrical Component)

Claims

1. A construction machine equipped with a wireless communication antenna located on the driver's cab, A driver's seat provided on the aforementioned driver's cab, The operating levers are located on one side of the driver's seat, The system includes an air conditioning duct having an upright portion that rises above the driver's cab, The antenna is positioned in front of the operating lever in the front-to-back direction, and outside the operating lever and inside the edge of the driver's cab in the left-to-right direction. The air conditioning duct has recesses that are indented on the left and right sides in the vertical direction of the upright portion, including the position where the antenna is located. A construction machine characterized by the following features.

2. The aforementioned antenna is located below the monitor, which is positioned in front of the operating lever. The construction machine according to feature 1.

3. The antenna is positioned outside the upright portion in the left-right direction and below the upper end of the upright portion in the upright direction. A construction machine according to claim 1 or 2.

4. The monitor is positioned above the upright portion of the air conditioning duct. The antenna is positioned so that at least a portion of it overlaps the monitor in a plan view. The construction machine according to feature 2.

5. The driver's cab is equipped with a duct support frame that supports the air conditioning duct, The antenna is provided in a state where it is supported by the duct support frame. A construction machine according to claim 1 or 2.

6. The electrical components are provided, which are located below the antenna in the vertical direction and are supported by the air conditioning duct. A construction machine according to claim 1 or 2.

7. The air conditioning duct has an inclined portion that slopes upward when viewed from the side, which serves as a support for the electrical components. The construction machinery according to feature 6.

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