Construction machine

Abstract

To provide a structure to arrange a GNSS antenna adequately for a work machine provided with a lower structure and a super structure.SOLUTION: A work vehicle in accordance with an embodiment of the present invention is provided with eaves 55, and an attachment part of a GNSS antenna. The eaves 55 is placed above a driving seat 37 arranged on an upper structure 12 rotatably supported on a lower structure 11 and supported on a pair of columns erected at the rear of the driving seat 37. The attachment of the GNSS antenna is erected upward from a base body 61 connected to one of the columns, on which the GNSS antenna 64 is attached.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention primarily relates to construction machines equipped with GNSS antennas. [Background technology]

[0002] Patent Document 1 discloses a work vehicle equipped with a GPS antenna. A long rod-shaped fixed member is attached to the top and bottom of the work vehicle. The GPS antenna is attached to the fixed member.

[0003] Patent Document 2 discloses a construction machine including a lower traveling body and an upper rotating body supported rotatably relative to the lower traveling body. A GPS antenna is attached to this construction machine. Specifically, a hydraulic oil tank is disposed on the upper rotating body, and a GPS antenna is attached to this hydraulic oil tank. In addition, since the hydraulic oil tank is covered with a tank cover, the GPS antenna is also covered with the tank cover, and the antenna can be protected. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-56280 A [Patent Document 2] JP 2003-112579 A Summary of the Invention [Problem to be solved by the invention]

[0005] A primary object of the present invention is to provide a structure for appropriately arranging a GNSS antenna in a construction machine having a lower traveling body and an upper rotating body.

[0006] The problem to be solved by the present invention has been described above. Next, the means for solving this problem and the effects thereof will be described.

[0007] According to an aspect of the present invention, there is provided a work vehicle having the following configuration. That is, the work vehicle includes a eaves and a GNSS antenna mounting portion. The eaves are disposed above a driver's seat installed on an upper rotating body that is rotatably supported on a lower traveling body, and are supported by a pair of pillars that stand upright behind the driver's seat. The GNSS antenna mounting portion rises upward from a base body connected to one of the pillars, and a GNSS antenna is attached to the GNSS antenna. [Brief description of the drawings]

[0008] [Figure 1] 1 is a side view showing the overall configuration of a slewing work vehicle according to an embodiment of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 4 is a perspective view of an antenna mounting structure provided on a slewing work vehicle according to a first modified example. [Figure 6] FIG. 4 is a plan view of a slewing work vehicle according to a first modified example. [Figure 7] FIG. 13 is a perspective view of an antenna mounting structure provided on a slewing work vehicle according to a second modified example. [Figure 8] FIG. 11 is a perspective view of an antenna mounting structure provided on a slewing work vehicle according to a third modified example. [Figure 9] FIG. 13 is a perspective view showing a comparative example in which a pair of antennas are individually attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view showing the overall configuration of a slewing work vehicle 1 according to one embodiment of the present invention.

[0010] A revolving work vehicle (construction machine, hydraulic excavator) 1 shown in FIG.

[0011] The lower traveling body 11 includes a crawler traveling device 21 and a hydraulic motor 22. The crawler traveling device 21 and the hydraulic motor 22 are each disposed in a pair on the left and right.

[0012] Each crawler travelling device 21 has an endless crawler made of, for example, rubber. The crawler is wound around a sprocket, and the sprocket is connected to the output shaft of a hydraulic motor 22 arranged on the same side as the crawler travelling device 21.

[0013] Each hydraulic motor 22 is configured to be capable of rotating in both forward and reverse directions, thereby allowing the slewing work vehicle 1 to move forward and backward. The left and right hydraulic motors 22 are configured to be capable of being driven independently, thereby allowing the slewing work vehicle 1 to move straight ahead and the direction of the slewing work vehicle 1 (lower traveling structure 11) to be changed.

[0014] The upper rotating body 12 comprises a rotating frame 31, a vehicle body section 32, a rotating motor 33, an engine (prime mover) 34, a hydraulic pump unit 35, a control section 36, a driver's seat 37, a GNSS antenna 64, a working device 13, and a counterweight 38.

[0015] The revolving frame 31 is disposed above the lower traveling body 11 and is supported by the lower traveling body 11 so as to be rotatable about an axis extending in the vertical direction. The vehicle body 32 is fixed to the revolving frame 31 so as to rotate integrally with the revolving frame 31. The vehicle body 32 is substantially circular in a plan view (more specifically, the front part has a linear shape), and constitutes part of the side of the upper revolving body 12. A space is formed inside the vehicle body 32, and a revolving motor 33, an engine 34, a hydraulic pump unit 35, etc. are disposed in this space.

[0016] The swing motor 33 generates a driving force that rotates the swing frame 31 and the vehicle body section 32 relative to the lower traveling structure 11. The engine 34 is disposed at the rear of the upper swing structure 12. The rear means, for example, rearward of the center in the fore-and-aft direction. The engine 34 is configured as, for example, a diesel engine. The engine 34 may be a gasoline engine. An electric motor may be provided in addition to or instead of the engine 34. The hydraulic pump unit 35 is driven by the engine 34 and generates hydraulic force required for the swing work vehicle 1 to travel and work.

[0017] The control unit 36 ​​is equipped with various operating members. These operating members include a pair of left and right travel operation levers 36a and work operation levers 36b. The driver's seat 37 is located above the engine 34 and in the vicinity of the control unit 36. The operator sits in the driver's seat 37 and operates the above-mentioned operating members to give various instructions to the rotating work vehicle 1. The GNSS antenna 64 is located behind the driver's seat 37. A method for mounting the GNSS antenna 64 will be described in detail later.

[0018] The working device 13 includes a boom 41, an arm 42, a bucket 43, and a blade (blade) 47. The working device 13 also includes a boom cylinder 44, an arm cylinder 45, a bucket cylinder 46, and a blade cylinder 48 as actuators.

[0019] The boom 41 is configured as an elongated member, and its base end is rotatably supported at the front part of the vehicle body part 32. A boom cylinder 44 is attached to the boom 41, and the boom 41 can be rotated by extending and contracting the boom cylinder 44.

[0020] The arm 42 is configured as an elongated member, and its base end is rotatably supported at the tip of the boom 41. An arm cylinder 45 is attached to the arm 42, and the arm 42 can be rotated by extending and contracting the arm cylinder 45.

[0021] The bucket 43 is configured as a member formed in a container shape, and its base end is rotatably supported by the tip end of the arm 42. A bucket cylinder 46 is attached to the bucket 43, and the bucket cylinder 46 extends and retracts to rotate the bucket 43, thereby enabling scooping / dumping operations to be performed.

[0022] The blade 47 is provided so as to extend in the vehicle body width direction (left-right direction). The blade 47 is disposed in front of the lower running body 11. The blade 47 is supported so as to be rotatable about an axis extending in the left-right direction relative to the lower running body 11. A blade cylinder 48 is attached to the blade 47, and the blade cylinder 48 extends and retracts to raise and lower the blade 47.

[0023] In this embodiment, the boom cylinder 44, the arm cylinder 45, the bucket cylinder 46, and the blade cylinder 48 are all configured by hydraulic cylinders. These hydraulic cylinders expand and contract by hydraulic pressure generated by the hydraulic pump unit 35.

[0024] The counterweight 38 is a weight for stabilizing the revolving work vehicle 1, which is provided with the heavy working device 13 at the front. Therefore, the counterweight 38 is disposed at the rear end of the upper revolving body 12. In a plan view, the outer edge (outer peripheral surface) of the counterweight 38 is arc-shaped.

[0025] Next, a detailed description of how to attach the GNSS antenna 64 will be given with reference to FIGS.

[0026] Here, when the upper rotating body 12 rotates relative to the lower traveling body 11, the front and rear of the lower traveling body 11 and the front and rear of the upper rotating body 12 do not coincide with each other. In the following, in order to explain the configuration of the upper rotating body 12, the front and rear of the upper rotating body 12 will be simply referred to as the front and rear.

[0027] As shown in FIG. 3 and FIG. 4, two GNSS antennas 64 are attached to the rotating work vehicle 1. This is because it is necessary to obtain position information of the working device 13 of the rotating work vehicle 1 when performing information construction such as machine control technology and machine guidance technology. In particular, in the case of the rotating work vehicle 1, even if the upper rotating body 12 rotates with respect to the lower traveling body 11, the position of the rotating work vehicle 1 and the rotation angle information of the upper rotating body 12 are required to detect the position information of the working device 13, and the detection results of the two GNSS antennas 64 are required to obtain these values. In addition, the relative positions of the two GNSS antennas 64 with respect to the rotating work vehicle 1 are required to obtain these values ​​with high accuracy. In addition, the arrangement interval of the two GNSS antennas 64 needs to be equal to or greater than a specified value (minimum arrangement interval).

[0028] As shown in Fig. 3, the slewing work vehicle 1 is equipped with an eaves support part 51 and an eaves 55, and a GNSS antenna 64 is attached to this eaves support part 51. The eaves support parts 51 are arranged in a pair on the left and right, and one GNSS antenna 64 is attached to each of the positions corresponding to the two eaves support parts 51. As shown in Fig. 2, the left and right eaves support parts 51 have different shapes, but since the left and right eaves support parts 51 have the same function, they will be described together below. Note that the left and right eaves support parts 51 may have the same shape or be symmetrical.

[0029] 3, the eaves support part 51 includes a rear support 52, an eaves mounting part 53, and a front support 54. The eaves support part 51 may be configured by bending one member (a pipe material), or may be configured by connecting multiple members by welding or bolts, etc.

[0030] The rear support pillar 52 is a member (a member whose longitudinal direction is parallel to the up-down direction) extending upward from the rear of the upper rotating body 12. The rear of the upper rotating body 12 means the rear of the center in the fore-and-aft direction of the upper rotating body 12 (more specifically, the rearmost part when the upper rotating body 12 is divided into four equal parts in the fore-and-aft direction). From another perspective, the rear support pillar 52 extends upward from behind the mounting position of the driver's seat 37. The rear support pillar 52 is fixed to the vehicle body 32 with bolts or the like. The rear support pillar 52 may also extend diagonally upward.

[0031] The eaves mounting portion 53 is connected to the upper end of the rear support column 52. The eaves mounting portion 53 is a member extending in the front-rear direction. A eaves 55 is attached so as to connect the pair of left and right eaves mounting portions 53. The eaves 55 is disposed so as to cover the upper part of the control panel 36 and the driver's seat 37.

[0032] The front support column 54 is a member extending upward from the front of the upper rotating body 12. The definition of the front corresponds to the definition of the rear. The front end of the eaves mounting part 53 is connected to the upper end of the front support column 54.

[0033] In this way, the swivel work vehicle 1 of this embodiment is a so-called canopy type in which a canopy is attached to the support pillar. In other words, since the swivel work vehicle 1 of this embodiment is not a cabin type, the driving space in which the control unit 36 ​​and the driver's seat 37 are arranged is not partitioned off from the outside. In addition, since the swivel work vehicle 1 of this embodiment has two support pillars at the front and rear, it is a so-called four-post canopy type. The swivel work vehicle 1 may also be a two-post canopy type in which the front support pillar 54 is omitted.

[0034] Next, we will explain the antenna mounting structure 60. The antenna mounting structure 60 is a structure for mounting a GNSS antenna 64 to the rotating work vehicle 1. As shown in Figures 3 and 4, the antenna mounting structure 60 includes a base body 61, an antenna support 63, and a GNSS antenna 64.

[0035] The base body 61 is a member extending in the left-right direction. As shown in Fig. 3, the base body 61 is disposed on the rear side of the pair of left and right rear columns 52 so as to connect the pair of left and right rear columns 52. Specifically, a pair of left and right mounting members 62 for mounting the base body 61 to the rear columns 52 are attached to the front side of the base body 61.

[0036] The mounting members 62 are clamp members, and are attached to the rear columns 52 by clamping the rear columns 52 and tightening bolts. The left-right spacing of the mounting members 62 matches the left-right spacing of the rear columns 52. Thus, a pair of left and right mounting members 62 are attached to the pair of left and right rear columns 52, respectively. An expandable member such as rubber may be disposed between the mounting members 62 and the rear columns 52. The mounting members 62 can be removed from the rear columns 52 by loosening the bolts, as they are released from their grip.

[0037] Making the mounting member 62 detachable makes it possible to add the GNSS antenna 64 in a simple manner to an existing swivel work vehicle 1. Also, for example, when loading the swivel work vehicle 1 onto a truck or the like for transportation, the size of the swivel work vehicle 1 can be reduced by removing the antenna mounting structure 60, so that it does not exceed the upper limit of the loading size of the truck, for example. Also, if the arrangement interval of the rear support columns 52 is constant, the mounting height of the antenna mounting structure 60 can be easily adjusted.

[0038] The antenna poles 63 are members that extend vertically, and are attached in a pair on the left and right sides to the upper surface of the base body 61. A protrusion having a screw groove is formed on the upper part of the antenna poles 63, as shown in Fig. 4. As described above, it is preferable to separate the two GNSS antennas 64 as far as possible, and therefore, in this embodiment, the arrangement interval of the antenna poles 63 is greater than the arrangement interval of the mounting members 62 (the arrangement interval of the rear poles 52). However, the arrangement intervals of both may be the same, or the arrangement interval of the antenna poles 63 may be smaller.

[0039] The GNSS antennas 64 are arranged in a pair on the left and right, and are attached to the upper parts of the pair of left and right antenna poles 63, respectively. Specifically, a screw hole is formed on the underside of the GNSS antenna 64, and the GNSS antenna 64 can be attached to the antenna pole 63 by aligning the screw hole of the GNSS antenna 64 with the protruding part of the antenna pole 63 and rotating it. In addition, the GNSS antenna 64 can be removed from the antenna pole 63 by rotating it in the reverse direction. Making the GNSS antenna 64 detachable can prevent theft by removing the GNSS antenna 64 when not in use.

[0040] The GNSS antenna 64 receives signals from GNSS satellites that make up a satellite positioning system such as GPS. The positioning signals received by the GNSS antenna 64 are input to a receiving section (not shown) where positioning calculations are performed. By performing the positioning calculations, position information of the rotating work vehicle 1 (particularly position information of the GNSS antenna 64) is calculated as, for example, latitude and longitude information. At the same time, the rotation angle of the upper rotating body 12 is also calculated.

[0041] The antenna mounting structure 60 is attached to the rear side of the rear support 52. Therefore, in the plan view (FIG. 2) of the rotating work vehicle 1, the antenna support 63 and the GNSS antenna 64 are arranged at a position that does not overlap with the eaves 55. This makes it difficult for the positioning signal from the GNSS satellite to be blocked by the eaves 55. Also, as shown in FIG. 1, the upper end of the GNSS antenna 64 is the same as the upper end of the eaves mounting part 53 (or the eaves 55) or the GNSS antenna 64 is slightly lower. This makes it difficult for objects falling from above to directly hit the GNSS antenna 64. Also, since the boundary between the rear support 52 and the eaves mounting part 53 is gently curved rather than bent at a right angle, the arrangement interval between the eaves support part 51 and the GNSS antenna 64 can be increased. This makes it easier to receive the positioning signal from the GNSS satellite. The GNSS antenna 64 may be arranged at a higher position than the eaves mounting part 53 to make it easier to receive the positioning signal from the GNSS satellite.

[0042] When performing an antenna mounting method for mounting a GNSS antenna 64 on the rotating work vehicle 1, first, the base body 61 is mounted on both of the pair of rear columns 52 so as to connect the pair of rear columns 52 to each other (base body mounting process). Next, the pair of GNSS antennas 64 are mounted on the pair of antenna columns 63 extending upward from the base body 61 (antenna mounting process). Note that the order of the above steps is an example and may be different. In other words, the GNSS antenna 64 may be mounted on the antenna columns 63 in advance, and then the base body 61 may be mounted on the rear columns 52.

[0043] Next, the position of the antenna mounting structure 60 relative to the rotation area 100 of the revolving work vehicle 1 will be described with reference to Fig. 2. In the following description, the rotation area 100 is an area (an area inside the outer edge of the path) whose outer edge is a path (circle or arc) when the outer edge of the counterweight 38 rotates together with the upper revolving body 12 in a plan view. From another perspective, the rotation area 100 can be considered as an area in which the vehicle body section 32 of the upper revolving body 12 rotates in a plan view, an area in which a part of the upper revolving body 12 excluding the working implement 13 and the antenna mounting structure 60 rotates in a plan view, or an area in which the rear part of the upper revolving body 12 (the part rearward of the center in the fore-aft direction and excluding the antenna mounting structure 60) rotates.

[0044] In the swivel work vehicle 1 of this embodiment, the swivel area 100 is located inside the lower traveling body 11 in the left-right direction (in other words, the swivel area 100 is located within the vehicle width of the lower traveling body 11). In detail, the center of rotation is the center of the swivel work vehicle 1 in the left-right direction. Also, the diameter of the swivel area 100 is smaller than the left-right width of the lower traveling body 11 (in detail, the length from the left end of the left lower traveling body 11 to the right end of the right lower traveling body 11). In other words, even if the upper rotating body 12 is rotated, the upper rotating body 12 will not be located outside the lower traveling body 11. The diameter of the swivel area 100 may be larger than the left-right width of the lower traveling body 11. Even in this case, it is preferable that the diameter of the swivel area 100 is smaller than 1.2 times the left-right width of the lower traveling body 11.

[0045] The antenna mounting structure 60 of this embodiment is smaller than the left-right width of the lower running body 11, and does not protrude in the left-right direction from the lower running body 11. In other words, the left-right ends of the antenna mounting structure 60 are located inside in the left-right direction from the left-right ends of the lower running body 11. Therefore, as long as the width is sufficient for the lower running body 11 to travel, the antenna mounting structure 60 will basically not collide with an obstacle.

[0046] In this embodiment, the entire antenna mounting structure 60, except for a portion of the left end, is located inside the rotation area 100. In addition, since the amount by which the antenna mounting structure 60 protrudes from the rotation area 100 is also small, the antenna mounting structure 60 is less likely to collide with an obstacle when the upper rotating body 12 rotates. Furthermore, as shown in the first modified example below, the entire antenna mounting structure 60 can also be located inside the rotation area 100.

[0047] Next, a first modified example will be described with reference to Figures 5 and 6. In the following description, the same or similar members as those in the above embodiment are denoted by the same reference numerals in the drawings, and descriptions thereof may be omitted.

[0048] The slewing work vehicle 1 of the first modified example includes an antenna mounting structure 60 that can position the antenna mounting structure 60 inside the turning area 100 while preventing the spacing between the GNSS antennas 64 from becoming too small. The first modified example differs from the above embodiment mainly in the structure of the base body 61. Specifically, the base body 61 of the first modified example has an L-shape in a plan view. In other words, the base body 61 includes a first portion 61a and a second portion 61b.

[0049] The first portion 61a, like the base body 61 in the above embodiment, extends left and right and is a portion for connecting the pair of left and right rear supports 52. Both of the two mounting members 62 are attached to the first portion 61a. An antenna support 63 is disposed in the vicinity of an end portion of the first portion 61a on a side different from the boundary with the second portion 61b (more specifically, at a position slightly away from the end portion).

[0050] While the mounting member 62 is attached to an end of the base body 61, the antenna support 63 is disposed at a position slightly away from the end (for example, at a position where the mounting member 62 and the GNSS antenna 64 do not overlap in a plan view). This allows the GNSS antenna 64 to be positioned inside the rotation region 100 as shown in Fig. 6. In addition, the rear corner of the left end of the first portion 61a (where the mounting member 62 is attached) is rounded off (chamfered). This allows the base body 61 to be positioned inside the rotation region 100 as shown in Fig. 6.

[0051] The second portion 61b extends forward from the boundary with the first portion 61a. Therefore, the longitudinal direction of the first portion 61a intersects (is perpendicular to) the longitudinal direction of the second portion 61b. The antenna pole 63 is disposed in the second portion 61b near the end on the side different from the boundary with the first portion 61a. Although the corner of the right end of the first portion 61a (the rear end of the second portion 61b) is not rounded off, this corner may be rounded off.

[0052] Since the antenna mounting structure 60 is located inside the rotation area 100, even when the upper rotating body 12 is rotated, the antenna mounting structure 60 will not be located outside the rotation area 100. Furthermore, as in the above embodiment, since the rotation area 100 is located inside in the left-right direction from the lower running body 11, even when the upper rotating body 12 is rotated, the antenna mounting structure 60 will not be located outside the lower running body 11. As a result, it is possible to reduce the possibility that the antenna mounting structure 60 will collide with an obstacle.

[0053] Furthermore, by providing the second portion 61b and arranging the GNSS antenna 64 in the second portion 61b, the arrangement interval of the GNSS antenna 64 can be made larger compared to a configuration in which the GNSS antenna 64 is arranged on a linear base body 61.

[0054] Next, a second modified example will be described with reference to Fig. 7. The second modified example differs from the above embodiment in that the base body 61 includes a first adjustment mechanism 70. The first adjustment mechanism 70 is a mechanism for adjusting the arrangement distance between the pair of left and right mounting members 62.

[0055] 7, the first adjustment mechanism 70 includes an inner member 71 that is slidably inserted into the inside of the base body 61. The mounting member 62 is attached to the inner member 71. The inner member 71 is formed with a plurality of inner holes 72 for positioning. The base body 61 is also formed with outer holes 73 for positioning. After the inner holes 72 that correspond to the desired arrangement interval of the mounting member 62 are aligned with the outer holes 73, the inner member 71 is attached to the base body 61 by fastening bolts 74.

[0056] If the arrangement interval of the mounting members 62 and the arrangement interval of the rear columns 52 do not match, the antenna mounting structure 60 cannot be attached to the rear columns 52. In this regard, in the second modified example, the arrangement interval of the mounting members 62 can be adjusted, so that the antenna mounting structure 60 can be attached to a variety of swivel work vehicles 1. Furthermore, even in a swivel work vehicle 1 configured such that the arrangement interval of the rear columns 52 changes as it approaches the top, for example, the antenna mounting structure 60 can be attached at a desired height.

[0057] The configuration for adjusting the arrangement interval of the mounting members 62 is not limited to the above. For example, the mounting members 62 may be configured to be detachable from the base body 61, and a plurality of holes or the like for attaching the mounting members 62 may be formed in the base body 61.

[0058] Next, a third modified example will be described with reference to Fig. 8. The third modified example differs from the above embodiment in that the base body 61 includes a second adjustment mechanism 80. The second adjustment mechanism 80 is a mechanism for adjusting the arrangement interval between the pair of left and right antenna poles 63.

[0059] 8, the second adjustment mechanism 80 includes an inner member 81 that is slidably inserted into the inside of the base body 61. The antenna support 63 is attached to the inner member 81. The inner member 81 is formed with a plurality of inner holes 82 for positioning. The base body 61 is also formed with outer holes 83 for positioning. After the inner holes 82 that correspond to the desired arrangement interval of the GNSS antennas 64 are aligned with the outer holes 83, the inner member 81 is attached to the base body 61 by fastening bolts 84.

[0060] As described above, it is preferable that the spacing between the two GNSS antennas 64 is large. Specifically, in order to properly detect the position, etc., of the rotating work vehicle 1, the spacing between the GNSS antennas 64 needs to be larger than the minimum spacing. This minimum spacing differs depending on the type of GNSS antenna 64. In this regard, in the second modified example, the spacing between the antenna poles 63 (GNSS antennas 64) can be adjusted, so that the GNSS antennas 64 can be arranged so as to satisfy the minimum spacing conditions depending on the type of GNSS antenna 64.

[0061] The configuration for adjusting the arrangement interval of the antenna masts 63 is not limited to the above. For example, the antenna masts 63 may be configured to be detachable from the base body 61, and a plurality of holes or the like for attaching the antenna masts 63 may be formed in the base body 61.

[0062] In the configurations of the above embodiment and modified example, the two GNSS antennas 64 are connected to the same base body 61. Therefore, the relative positions of the GNSS antennas 64 are constant and known. Therefore, compared to a configuration in which the base body 61 is separate as shown in Fig. 9, the task of registering the relative positions of the two GNSS antennas 64 with respect to the rotating work vehicle 1 is simpler and more accurate.

[0063] It is not impossible for the antenna mounting structure 60 to be arranged so as to connect the pair of left and right front columns 54. However, since the space in front of the front columns 54 is narrow due to the influence of the working device 13 and the like, it is preferable to attach the antenna mounting structure 60 as in the above embodiment. Also, it is not impossible for the antenna mounting structure 60 to be arranged so as to connect the rear column 52 and the front column 54, which are arranged at the front and rear. However, since the space between the rear column 52 and the front column 54 is used for riding the operator, it is preferable to attach the antenna mounting structure 60 as in the above embodiment.

[0064] As described above, the revolving work vehicle 1 of the above embodiment includes the lower traveling body 11 and the upper rotating body 12. The upper rotating body 12 is supported by the lower traveling body 11 so as to be revolvable. The upper rotating body 12 includes the engine 34, the driver's seat 37, the eaves 55, the rear support 52, the base body 61, the antenna support 63, and the GNSS antenna 64. The engine 34 is disposed at the rear of the upper rotating body 12, and drives at least the lower traveling body 11 (by driving the hydraulic pump unit 35). The driver's seat 37 is disposed above the engine 34, and an operator sits on the driver's seat 37. The eaves 55 are disposed above the driver's seat 37. The rear support 52 are disposed in a pair, extend upward from the rear of the upper rotating body 12, and support the eaves 55. The base body 61 is attached to both of the pair of rear support columns 52 so as to connect the pair of rear support columns 52 to each other. The antenna poles 63 are arranged in a pair, and extend upward from the base body 61 at positions that do not overlap with the eaves 55 in a plan view. The GNSS antennas 64 are arranged in a pair, and are attached to the pair of antenna poles 63, respectively.

[0065] As a result, since the pair of GNSS antennas 64 are connected to the same base body 61 via the antenna pillars 63, the relative positions of the pair of GNSS antennas 64 are constant and known, facilitating GNSS setting. Also, by mounting the GNSS antenna 64 in the above positional relationship using the rear pillar 52, the GNSS antenna 64 can be positioned in a position where radio waves from GNSS satellites are less likely to be blocked by the eaves 55 or the like.

[0066] In the slewing work vehicle 1 of the above embodiment, the base body 61 is provided with a pair of mounting members 62 that are detachably attached to the pair of rear support columns 52, respectively.

[0067] This makes it possible to reduce the size of the swivel work vehicle 1 in situations where the GNSS antenna 64 is not necessary (for example, when the swivel work vehicle 1 is being transported, etc.). Also, if the mounting height of the base body 61 can be changed because the spacing between the rear supports 52 is constant, etc., the mounting height of the GNSS antenna 64 can be changed.

[0068] Furthermore, in the slewing work vehicle 1 of the second modified example, the base body 61 is provided with a first adjustment mechanism 70 that can change the arrangement interval of the pair of mounting members 62.

[0069] This allows the base body 61 to be attached to various swivel work vehicles 1 having different spacing between the rear support columns 52. In addition, the mounting height of the base body 61 can be adjusted even for a swivel work vehicle 1 in which the spacing between the rear support columns 52 changes depending on the height.

[0070] In addition, in the first modified example of the swivel work vehicle 1, when viewed in a plan view, if the area whose outer edge is the trajectory of the outer edge of the counterweight 38 arranged at the rear end of the upper rotating body 12 when it rotates together with the upper rotating body 12 is defined as a rotation area 100, the base body 61, the antenna support 63, and the GNSS antenna 64 are located inside the rotation area 100.

[0071] This makes it possible to prevent the turning area 100 from becoming large due to the members for mounting the GNSS antenna 64.

[0072] In the slewing work vehicle 1 of the above embodiment, the slewing area 100 is within the vehicle width of the lower traveling structure 11 .

[0073] This makes it possible to apply the present invention to a relatively small construction machine in which the main portion of the upper rotating body 12 does not protrude outside the lower running body 11 even when the machine rotates.

[0074] In addition, in the above embodiment of the slewing work vehicle 1, when viewed in a plan view, the left and right ends of the base body 61, the antenna support 63, and the GNSS antenna 64 are located further inward in the left and right direction than the left and right ends of the lower running body 11.

[0075] As a result, the members for mounting the GNSS antenna 64 do not protrude in the left-right direction from the lower running structure 11, so that the GNSS antenna 64 and the like are less likely to collide with obstacles, for example, when the rotating work vehicle 1 is located in a narrow space.

[0076] Furthermore, in the slewing work vehicle 1 of the third modified example, the base body 61 is provided with a second adjustment mechanism 80 that can change the arrangement interval between the pair of antenna poles 63.

[0077] Since the minimum placement interval between a pair of GNSS antennas 64 is determined according to the specifications of the GNSS antennas 64, the provision of the second adjustment mechanism 80 described above makes it possible to accommodate GNSS antennas 64 with various specifications.

[0078] The construction machine of this embodiment includes the following features and combinations thereof. [Feature 1] A visor is disposed above a driver's seat provided on an upper rotating body rotatably supported on a lower traveling body, and supported by a pair of support columns erected behind the driver's seat; a GNSS antenna attached to an antenna pole arranged to face one of the poles; Construction machinery equipped with [Feature 2] A base body connected to the support column is provided, The construction machine according to feature 1, wherein the antenna support is erected from the base body. [Feature 3] A construction machine as described in feature 1 or 2, further comprising a second GNSS antenna attached to a second antenna pillar arranged laterally offset relative to the other of the pillars. [Feature 4] The construction machine according to feature 3, wherein the GNSS antenna and the second GNSS antenna are arranged rearward of the pair of pillars. [Feature 5] A construction machine as described in feature 3 or 4, wherein, in a planar view, the GNSS antenna and the second GNSS antenna are arranged between the outer contour of the eaves and the outer contour of the upper rotating body. [Feature 6] The base body is connected to the other of the support posts, A construction machine described in any one of features 2 to 5, wherein the second antenna pole is erected from the base body.

[0079] The preferred embodiment and modifications of the present invention have been described above, but the above configurations can be modified, for example, as follows.

[0080] The configurations of the above-mentioned modified examples can be combined as appropriate. For example, the L-shaped base body 61 of the first modified example can be applied to the second or third modified example. Furthermore, the first adjustment mechanism 70 of the second modified example can be applied to the first or third modified example. Furthermore, the second adjustment mechanism 80 of the third modified example can be applied to the first or second modified example.

[0081] The shapes of the components constituting the antenna mounting structure 60 are merely examples and can be modified as appropriate. For example, the base body 61 or the antenna pole 63 is not limited to being straight and may include a bend. The mounting member 62 is not limited to being a clamp member, and may be configured to be attached using a screw hole formed on the rear pole 52 side. Also, the structure described as detachable in the above embodiment may not be detachable. [Explanation of symbols]

[0082] 1. Swinging work vehicle (construction machinery) 11 Undercarriage 12 Upper rotating body 13 Working Equipment 51 Eaves support 52 Rear support (post) 53 Eave mounting part 54 Front pillar 55 Eaves 60 Antenna mounting structure 61 Base body 62 Mounting material 63 Antenna mast 64 GNSS antenna

Claims

1. A visor is disposed above a driver's seat provided on an upper rotating body rotatably supported on a lower traveling body, and supported by a pair of support columns erected behind the driver's seat; a GNSS antenna mounting portion that rises upward from a base body connected to one of the supports and to which a GNSS antenna is attached; A work vehicle equipped with:

2. The work vehicle according to claim 1 , wherein the base body is formed so as to protrude laterally to one side of the one of the pillars.

3. The work vehicle according to claim 1 or 2, wherein the GNSS antenna is disposed inside the upper rotating body in a plan view.

4. The work vehicle according to claim 3 , wherein the driver's seat is disposed at a position offset to the other side of the pillar with respect to a center of the upper rotating body.

5. The work vehicle according to claim 1 or 2, wherein the GNSS antenna and the eaves are arranged side by side in a horizontal direction.

6. The work vehicle according to claim 1 , wherein the base body is connected to the one of the pillars rearwardly of the one of the pillars.

7. The work vehicle according to claim 1 or 2, wherein the base body is connected to the one of the pillars above a middle point of the pillar.

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