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EP-4005873-B1 - CONSTRUCTION MACHINE, ANTENNA ATTACHMENT METHOD, AND ANTENNA ATTACHMENT STRUCTURE

EP4005873B1EP 4005873 B1EP4005873 B1EP 4005873B1EP-4005873-B1

Inventors

  • OKAZAKI, KOHEI

Dates

Publication Date
20260506
Application Date
20200602

Claims (9)

  1. A construction machine (1), comprising: a lower traveling body (11); and an upper revolving body (12) revolvably supported by the lower traveling body (11), wherein the upper revolving body (12) includes a prime mover (34) disposed at a rear section of the upper revolving body (12) and driving at least the lower traveling body (11), an operator seat (37) disposed above the prime mover (34) and on which an operator is seated, a roof (55) disposed above the operator seat (37), a pair of rear support columns (52) extending upward from a rear section of the upper revolving body (12) and supporting the roof (55), characterised in that it further includes a base body (61) attached to the pair of the rear support columns (52) to connect the rear support columns (52) together, a pair of antenna support posts (63) extending upward from the base body (61) at positions not overlapping the roof (55) in plan view, and a pair of global navigation satellite system (GNSS) antennas (64), each GNSS antenna (64) being attached to each of the pair of the antenna support posts (63).
  2. The construction machine (1) according to claim 1, wherein the base body (61) includes a pair of attaching members (62), each attaching member (62) being detachably attached to each of the pair of the rear support columns (52).
  3. The construction machine (1) according to claim 2, wherein the base body (61) includes a first adjustment mechanism (70) capable of changing a placement distance between the pair of the attaching members (62).
  4. The construction machine (1) according to any one of claims 1 to 3, wherein the base body (61), the antenna support posts (63), and the GNSS antennas (64) are located, in plan view, inside a revolving area having an outer edge defined by a trajectory of an outer edge of a counterweight (38), which is disposed at the rear end of the upper revolving body (12), when the counterweight (38) revolves with the upper revolving body (12).
  5. The construction machine (1) according to claim 4, wherein the revolving area is within a vehicle width of the lower traveling body (11).
  6. The construction machine (1) according to any one of claims 1 to 5, wherein left ends of the base body (61), the antenna support posts (63), and the GNSS antennas (64) are located, in plan view, inside the left end of the lower traveling body (11) in a right-left direction, and right ends of the base body (61), the antenna support posts (63), and the GNSS antennas (64) are located, in plan view, inside the right end of the lower traveling body (11) in the right-left direction.
  7. The construction machine (1) according to any one of claims 1 to 6, wherein the base body (61) includes a second adjustment mechanism (80) capable of changing a placement distance between the pair of the antenna support posts (63).
  8. An antenna attachment method for attaching a GNSS antenna (64) to a construction machine (1), the construction machine (1) including a lower traveling body (11), and an upper revolving body (12) revolvably supported by the lower traveling body (11) and including a pair of rear support columns (52) extending upward from a rear section of the upper revolving body (12) and a roof (55) disposed above an operator seat (37) and supported by the pair of the rear support columns (52), characterised in that the antenna attachment method comprising: attaching a base body (61) to the pair of the rear support columns (52) to connect the rear support columns together (52); and attaching the pair of the GNSS antennas (64) to a pair of antenna support posts (63) extending upward from the base body at positions not overlapping the roof (55) in plan view.
  9. An antenna attachment structure adapted to be attached to a construction machine (1) including a lower traveling body (11), and an upper revolving body (12) revolvably supported by the lower traveling body (11) and including a pair of rear support columns (52) extending upward from a rear section of the upper revolving body (12) and a roof (55) disposed above an operator seat (37) and supported by the pair of the rear support columns (52), the antenna attachment structure comprising: a base body (61) capable of being attached to the pair of the rear support columns (52) to connect the rear support columns (52) together; a pair of antenna support posts (63) extending from the base body (61) configured to extend upward from the base body at positions not overlapping the roof in plan view, when the structure is attached to the construction machine; and a pair of GNSS antennas (64), each GNSS antenna (64) being attached to each of the pair of the antenna support posts (63).

Description

TECHNICAL FIELD The present invention mainly relates to a construction machine to which a pair of global navigation satellite system (GNSS) antennas are attached. BACKGROUND ART Patent Literature 1 discloses a work vehicle to which a global positioning system (GPS) antenna is attached. The work vehicle is equipped with a fixed member which is rod-shaped and extending vertically. The GPS antenna is attached to the fixed member. Patent Literature 2 discloses a construction machine including a lower traveling body and an upper revolving body which is revolvably supported with respect to the lower traveling body. The construction machine is equipped with a GPS antenna. Specifically, a hydraulic oil tank is disposed in the upper revolving body, and the GPS antenna is attached to the hydraulic oil tank. Since the hydraulic oil tank is covered by a tank cover, the GPS antenna is also covered by the tank cover, so that the antenna can be protected. CITATION LIST Patent Literature Patent Literature 1: Japanese Unexamined Patent Publication No. 2006-56280Patent Literature 2: Japanese Unexamined Patent Publication No. 2003-112579 DISCLOSURE OF INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION In a construction machine having a lower traveling body and an upper revolving body as in Patent Literature 2, when a GNSS antenna is attached to the upper revolving body, the position of the GNSS antenna changes according to the revolving angle of the upper revolving body. Therefore, it is necessary to install, for example, two GNSS antennas in order to obtain the position of the construction machine with high accuracy. In a case where the GNSS antenna is covered by another member, radio waves may not properly be received from the GNSS satellite. The present invention has been made in view of the above circumstances, and it is a main object of the present invention to provide a structure for properly arranging a pair of GNSS antennas in a construction machine including a lower traveling body and an upper revolving body. MEANS FOR SOLVING THE PROBLEMS EFFECT OF THE INVENTION The problem to be solved by the present invention is as described above, and the means for solving the problem and effects thereof will be described below. According to a first aspect of the present invention, there is provided a construction machine having the following configuration. That is, the construction machine includes a lower traveling body and an upper revolving body. The upper revolving body is supported revolvably by the lower traveling body. The upper revolving body includes a prime mover, an operator seat, a roof, rear support columns, a base body, antenna support posts, and GNSS antennas. The prime mover is disposed at the rear section of the upper revolving body and drives at least the lower traveling body. The operator seat is disposed above the prime mover and the operator is seated on the operator seat. The roof is disposed above the operator seat. The rear support columns are provided as a pair and extend upward from the rear section of the upper revolving body to support the roof. The base body is attached to the pair of rear support columns to connect them together. The antenna support posts are provided as a pair and extend upward from the base body at positions not overlapping the roof in plan view. The GNSS antennas are provided as a pair, and each GNSS antenna is attached to each of the pair of antenna support posts. This facilitates the GNSS setting, because the relative position of the pair of GNSS antennas is fixed and known as the GNSS antennas are connected to the same base body via the antenna support posts. By attaching the GNSS antennas using the rear support columns in the positional relationship described above, the GNSS antennas can be disposed at positions where the radio waves from the GNSS satellite are hardly blocked by the roof or the like. In the construction machine described above, the base body preferably includes a pair of attaching members, each attached detachably to each of the pair of rear support columns. This enables reduction in size of the construction machine in a situation where the GNSS antennas are not necessary (for example, during transportation of the construction machine). If the attaching height of the base body is changeable because, for example, the placement distance between the rear support columns is fixed, the attaching height of the GNSS antennas can be changed. In the construction machine described above, the base body preferably includes a first adjustment mechanism capable of changing the placement distance between the pair of attaching members. This allows the base body to be attached to various types of construction machines having different placement distances between the rear support columns. In addition, the attaching height of the base body can also be adjusted for the construction machine in which the placement distance between the rear support columns changes with height. In the