JP2012219516A - Cab for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cab for a construction machine, whose outline can be more beautiful in appearance.SOLUTION: A cab frame 12 includes a base frame body 13, front pillars 22, 23, rear pillars 24, 25, upper pillars 26, 27, and a rear cross beam member 31. A door 34 is mounted on the left side face of the cab frame 12. The rear pillars 24, 25, the upper pillars 26, 27 and the rear cross beam member 31 are connected together with rear connection members 32, 33. A press cover 38 includes a left rear panel 39, and a rear cross beam cover 40. The left rear panel 39 covers the rear connection member 32 on the side of the door 34. The rear cross beam cover 40 connected to the left rear panel 39 covers the rear cross beam member 31.

Description

  The present invention relates to a cab for construction machinery that is suitably used for forming a driver's cab such as a hydraulic excavator or a hydraulic crane.

  Generally, in construction machines such as a hydraulic excavator, an upper swing body is mounted on a lower traveling body so as to be capable of swinging, and a cab that forms an operator cab is provided on the upper swing body. The cab includes a frame body including a plurality of column members and beam members, and a plurality of exterior panels are attached to the frame body (see, for example, Patent Document 1).

  In the construction machine described in Patent Document 1, a left rear column member and a right rear column member are provided on the rear side of the cab, and the upper ends of the left rear column member and the right rear column member are connected by a rear beam member. is doing. Moreover, the beam part extended toward the front is connected with the both ends of the left and right direction of a back beam member. Further, the rear beam member is covered with a resin cover member, and a GPS antenna is accommodated in a space formed between the rear beam member and the cover member.

JP 2007-69799 A

  By the way, in the construction machine described in Patent Document 1, side panels as exterior covers are provided on the left and right side surfaces of the cab. Since the side panel is formed using a metal sheet metal member, it is necessary to form the side panel as a separate member from the resin cover member. There is a problem that the aesthetics are likely to deteriorate.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a construction machine cab capable of improving the appearance of the outer shape.

  In order to solve the above-described problems, the present invention includes a cab frame that forms a framework structure, and a door provided on a right side surface or a left side surface of the cab frame, and the cab frame includes a lower base frame. Body, left and right front pillars erected upward from the front end side of the base frame body, and left and right sides from the rear end side of the base frame body. Left and right rear pillars erected upward and the upper ends of the rear pillars are connected to the upper ends of the front pillars so as to be spaced apart in the left and right directions and extend in the front and rear directions. The present invention is applied to a cab for a construction machine including left and right upper pillars and rear lateral beam members extending in the left and right directions to connect the upper ends of the left and right rear pillars.

  The features of the configuration adopted by the invention of claim 1 are that the cab frame is located on the left and right door sides of the cab frame, the door side end portion of the rear cross beam member, and the rear portion located on the door side A door-side connecting portion that connects the upper end side of the pillar and the upper pillar located on the door side, a decorative cover that covers the door-side connecting portion and the rear cross beam member is provided, and the decorative cover is provided on the door side A door side rear panel that covers the connecting portion and forms a side surface behind the door, and a rear side beam cover that is connected to the door side rear panel and covers the rear side beam member.

  According to a second aspect of the present invention, the rear horizontal beam cover is provided with an antenna receiving recess that is recessed from the periphery to receive the antenna, and the antenna receiving recess is covered with a resin antenna cover.

  According to a third aspect of the present invention, the antenna receiving recess is provided with a wiring insertion hole through which the wiring arranged in the rear cross beam cover is inserted, and the antenna cover has a wiring insertion hole for taking out the wiring from the wiring insertion hole to the outside. The outlet is provided.

  According to the first aspect of the present invention, since the decorative cover includes the door side rear panel and the rear side beam cover, the door side connecting portion that is located at the upper rear side of the door side and connects the rear side beam member, the rear pillar, and the upper pillar. Can be covered by the door side rear panel, and the rear side beam member can be covered by the rear side beam cover connected to the door side rear panel. For this reason, when the cab is viewed from the door side, the door side rear panel can cover all the door side connecting portions, so that there is no discontinuous portion in the appearance on the rear side of the door which is easy to see from the outside. Can be improved. In addition, when the cab is viewed from the door side, the rear cross beam cover can be connected at a position hidden by the door side rear panel, so that these connecting portions can be made inconspicuous and the appearance quality can be improved. it can.

  According to the second aspect of the present invention, the rear horizontal beam cover is provided with the antenna receiving recess that is recessed from the periphery, and the antenna receiving recess is covered with the resin antenna cover. Therefore, the antenna is provided outside the rear horizontal beam cover. Can be arranged. For this reason, even when the rear horizontal beam member is covered with the metal rear horizontal beam cover, the radio wave is not blocked by the rear horizontal beam cover, and the antenna provided in the antenna housing recess transmits the radio wave through the resin antenna cover. Can be received.

  According to the invention of claim 3, since the antenna receiving recess is provided with the wiring insertion hole and the antenna cover is provided with the outlet, the wiring arranged in the rear transverse beam cover through the wiring insertion hole and the outlet is externally provided. It can be taken out. For this reason, for example, even when a rear illumination lamp or a rotating lamp is attached to the upper part of the cab, the wiring can be easily connected to these illumination lamps.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. It is a front view which expands and shows the cab in FIG. It is a perspective view which shows the state which attached the press cover and the roof panel to the cab frame. FIG. 4 is a perspective view showing the cab frame, press cover, and roof panel in FIG. 3 in an exploded state. It is a perspective view which expands and shows a rear part cross beam cover etc. in the state which removed the antenna cover. It is a perspective view which expands and shows an antenna accommodation recessed part. It is a perspective view similar to FIG. 5 which shows the extraction opening of an antenna cover. It is sectional drawing which expands and shows an antenna accommodation recessed part.

  Hereinafter, a case where a cab for construction machinery according to an embodiment of the present invention is applied to a hydraulic excavator will be described as an example, and a detailed description will be given with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a hydraulic excavator as a construction machine. The hydraulic excavator 1 is composed of a lower traveling body 2 having a crawler belt and an upper revolving body 3 provided on the lower traveling body 2 so as to be able to swivel. A working device 4 for performing work or the like is provided so as to be able to move up and down.

  Further, the upper swing body 3 includes a swing frame 5, a cab 11 described later mounted on the front left side of the swing frame 5, and a swing frame extending from the right side to the rear side of the cab 11 as shown in FIG. 5 is provided with a building cover 6 that accommodates an engine, a hydraulic pump (both not shown) and the like, and a counterweight 7 attached to the rear end portion of the revolving frame 5.

  Reference numeral 11 denotes a cab mounted on the left side of the front portion of the revolving frame 4. The cab 11 defines a driver's cab in which an operator gets, and has a driver's seat, various levers (none of which are shown), and the like. As shown in FIGS. 2 to 8, the cab 11 is roughly constituted by a cab frame 12, a door 34, a roof panel 37, a press cover 38 and the like which will be described later.

  Reference numeral 12 denotes a cab frame that forms a framework structure of the cab 11. The cab frame 12 includes a base frame 13, front pillars 22 and 23, rear pillars 24 and 25, which will be described later, as shown in FIGS. The upper pillars 26 and 27, the front connecting members 28 and 29, the front cross beam member 30, the rear cross beam member 31, the rear connecting members 32 and 33, and the like are included.

  Reference numeral 13 denotes a base frame body that is located below the cab 11 and forms a base. The base frame bodies 13 are arranged at four corner portions on the front left side, front right side, rear left side, and rear right side, respectively. Frame bases 14, 15, 16, 17, left and right vertical frames 18, 19 connecting the respective mounting bases 14, 15, 16, 17, and front and rear horizontal frames 20, 21. It is formed in a shape.

  Reference numerals 22 and 23 respectively denote front pillars positioned on the left and right corners of the base frame body 13, and these front pillars 22 and 23 are curved toward the front side, for example. . The front pillars 22 and 23 are formed of, for example, hollow deformed steel pipes, and the lower ends thereof are fixed to the mounting bases 14 and 15 disposed at the front part by welding means. A front window (not shown) is attached between the front pillars 22 and 23.

  Reference numerals 24 and 25 respectively denote rear pillars positioned on the left and right corners on the rear side of the base frame 13, and these rear pillars 24 and 25 are, for example, the same as the front pillars 22 and 23. Each of them is constituted by one deformed steel pipe. The rear pillars 24 and 25 are fixed to the mounting bases 16 and 17 whose lower ends are disposed at the rear by welding means.

  Reference numeral 26 denotes a left upper pillar provided extending forward and rearward from the upper part of the left front pillar 22 and the rear pillar 24. On the other hand, reference numeral 27 denotes a right upper pillar provided extending forward and rearward from the upper portions of the right front pillar 23 and the rear pillar 25. These upper pillars 26 and 27 are formed by using, for example, deformed steel pipes similar to the front pillars 22 and 23 described above.

  The front end portions of the upper pillars 26 and 27 are attached to the upper end portions of the front pillars 22 and 23 via front connection members 28 and 29 that are curved in an arc shape. Here, the left front connecting member 28 has one end fitted to the upper end of the front pillar 22 and fixed by welding means, and the other end is fitted to the front end of the upper pillar 26 and fixed by welding means. By doing so, the left front pillar 22 and the upper pillar 26 are connected. Similarly to the left front connecting member 28, the right front connecting member 29 is fixed to the upper end of the front pillar 23 and one end side of the upper pillar by welding means to connect them. A front cross beam member 30 extending in the left and right directions is fixed to the front connection members 28 and 29 by welding means. Thereby, the upper side of the front pillars 22 and 23 and the one end side of the upper pillars 26 and 27 are connected to the left and right via the front connection members 28 and 29.

  Reference numeral 31 denotes a rear transverse beam member that connects the upper end sides of the left and right rear pillars 24 and 25. The rear transverse beam member 31 extends in the left and right directions, and is rearward using rear connection members 32 and 33 described later. The pillars 24 and 25 are connected to the upper end side.

  Reference numeral 32 denotes a left rear connecting member provided between the left rear pillar 24 and the upper pillar 26. The rear connection member 32 is formed in a substantially rectangular parallelepiped block shape by casting, for example, and is located on the left and right door 34 side of the cab frame 12 to constitute a door side connection portion. The front side of the rear connecting member 32 is fitted to the rear end of the upper pillar 26 and fixed by welding means, and the lower side is fitted to the upper end of the rear pillar 24 and fixed by welding means. In addition, the rear connecting member 32 is fixed to the left end, which is the end on the door 34 side, of the rear cross beam member 31 on the right side by welding means. Thus, the rear connecting member 32 connects the left end side of the rear cross beam member 31, the upper end side of the rear pillar 24, and the rear end side of the upper pillar 26.

  Reference numeral 33 denotes a right rear connecting member provided between the right rear pillar 25 and the upper pillar 27. The rear connecting member 33 is formed in a substantially rectangular parallelepiped block shape by casting, for example, like the rear connecting member 32, the front side is fitted to the rear end of the upper pillar 27 and fixed by welding means, and the lower side is rear pillar 25. It is fitted to the upper end of each and fixed by welding means. The rear connecting member 33 is fixed to the right end of the rear cross beam member 31 by welding means on the left side. As a result, the rear connecting member 33 connects the right end side of the rear cross beam member 31, the upper end side of the rear pillar 25, and the rear end side of the upper pillar 27.

  Reference numeral 34 denotes a door provided between a center pillar 43 and a front pillar 22, which will be described later. The door 34 is attached to the left side surface of the cab 11 on the left side opposite to the work device 4 in the left and right directions. ing. Specifically, the rear side of the door 34 is attached to a center pillar 44 described later via a hinge 34A so that the door 34 can be opened and closed. An engagement hook 34B is provided at the center of the door 34. The engagement hook 34B engages with an engagement latch 35 provided on the left rear surface of the cab 11 to hold the door 34 in a fully opened state. To do. Furthermore, a contact portion 34 </ b> C that contacts the buffer member 36 is provided at the upper and lower portions of the door 34. Here, the buffer member 36 is formed using, for example, an elastic material, and is attached to the lower end side of the left rear coupling member 32 and the left rear pillar 24. The contact portion 34 </ b> C comes into contact with the buffer member 36 when the door 34 is fully opened, and suppresses rattling of the door 34.

  Reference numeral 37 denotes a roof panel constituting the ceiling surface of the cab 11, and the roof panel 37 is formed by, for example, pressing a metal sheet metal member. The roof panel 37 is fixed to the left and right upper pillars 26 and 27 and the front connecting member 30 by, for example, welding means. The rear end side of the roof panel 37 is located in the vicinity of the rear cross beam member 31 and is connected to a rear cross beam cover 40 of a press cover 38 described later.

  Reference numeral 38 denotes a press cover as a decorative cover that covers the rear cross beam member 31 and the rear connecting member 32. The press cover 38 covers the left rear connecting member 32 and forms a left rear side as a door-side rear panel. A rear panel 39, a rear horizontal beam cover 40 connected to the left rear panel 39 and covering the rear horizontal beam member 31, and a right rear cover 41 covering the right rear pillar 25 are provided.

  The left rear panel 39, the rear cross beam cover 40, and the right rear cover 41 are formed by, for example, pressing a metal sheet metal member, and are fixed to the cab frame 12 by, for example, welding means.

  Here, the left rear panel 39 and the rear cross beam cover 40 are connected to the periphery of the roof panel 37, and the boundary with the roof panel 37 is smoothly continuous. The left rear panel 39 includes a flat plate portion 39A that forms a left rear side surface, and a peripheral edge portion 39B that curves from the peripheral edge on the upper side and the rear side of the flat plate portion 39A toward the right side. The peripheral edge 39 </ b> B is disposed on the rear side of the rear pillar 24 and the rear coupling member 32. The rear surface of the rear pillar 24, the connection portion between the rear pillar 24 and the rear coupling member 32, and the connection portion between the rear pillar 24 and the mounting base 16. Each covering. The left rear panel 39 covers the left rear connection member 32 when the cab 11 is viewed from the door 34 side.

  Further, in the flat portion 39A of the left rear panel 39, through holes 42 for attaching the buffer members 36 are formed respectively at the rear upper part and the rear lower part. Further, on the front side of the left rear panel 39, for example, an inner panel 43 that is bent in a substantially U shape by welding means or the like and extends upward and downward is fixed. The inner panel 43 and the left rear panel 39 form a center pillar 44 made of a hollow plate. The center pillar 44 is fixed to the vertical frame 18 at the lower end side by welding means and is fixed to the upper pillar 26 at the upper end side.

  The rear cross beam cover 40 includes an upper surface portion 40A that covers the upper portion of the rear cross beam member 31, and a rear surface portion 40B that is formed by bending in a substantially L shape from the rear end of the upper surface portion 40A and covers the rear portion of the rear cross beam member 31. I have. Further, the rear cross beam cover 40 extends to the position where the left end side extends over the rear cross beam member 31 to the rear connection member 32 and covers the connection portion between the rear cross beam member 31 and the rear connection member 32. Further, the right end side of the rear cross beam cover 40 extends beyond the rear cross beam member 31 to a position where it is applied to the rear connection member 33, and is smoothly connected to the outer surface of the rear connection member 33.

  The right rear cover 41 includes a right side surface portion 41A that covers the right side surface of the right rear portion pillar 25, and a rear surface portion 41B that is formed by bending in a substantially L shape from the rear end of the right side surface portion 41A and covers the rear portion of the rear pillar 25. It has. Here, the upper end side of the right rear cover 41 extends beyond the rear pillar 25 to a position on the rear connecting member 33, and is smoothly connected to the outer surface of the rear connecting member 33. On the other hand, the lower end side of the right rear cover 41 is extended to a position substantially in the middle of the rear pillar 25 and a position near the upper surface of the building cover 6 or a position below the upper surface of the building cover 6.

  Reference numeral 45 denotes an antenna receiving recess formed in the rear horizontal beam cover 40, and the antenna receiving recess 45 is formed to be recessed toward the rear horizontal beam member 31 rather than around the rear horizontal beam cover 40. Specifically, the antenna housing recess 45 includes a horizontal surface portion 45A that is recessed below the upper surface portion 40A of the rear transverse beam cover 40, and a vertical surface portion 45B that is recessed forward of the rear surface portion 40B of the rear transverse beam cover 40. I have.

  A first wiring insertion hole 46 is formed in the vicinity of the center of the horizontal plane portion 45 </ b> A, and a GPS antenna 47 is attached in the vicinity of the wiring insertion hole 46. The antenna cable 47A of the GPS antenna 47 is inserted into the rear cross beam cover 40 through the first wiring insertion hole 46 and connected to a processing device (not shown) that performs various arithmetic processes.

  On the other hand, second and third wiring insertion holes 48 and 49 are formed through the vertical surface portion 45B so as to be spaced apart in the left and right directions. The second and third wiring insertion holes 48 and 49 are provided for inserting the wiring 50 arranged in the rear cross beam cover 40, and the wiring 50 is connected to, for example, an optional rear illumination lamp or rotating lamp. The For this reason, the second and third wiring insertion holes 48 and 49 are respectively closed by the cap 51 when a rear illumination lamp or the like is not used. In addition, the vertical surface portion 45B is formed with a protrusion 52 that is located between the second and third wiring insertion holes 48 and 49 and protrudes rearward. The projection 52 separates the second wiring insertion hole 48 and the third wiring insertion hole 49 in the vertical surface portion 45B.

  53 is a resin antenna cover for covering the antenna housing recess 45, and the antenna cover 53 is formed to be bent in a substantially L shape in accordance with the opening of the antenna housing recess 45. The antenna cover 53 is bonded and fixed to the outer peripheral edge of the antenna receiving recess 45 over substantially the entire circumference, and is attached in a state of being smoothly continuous with the outer surface of the rear transverse beam cover 40. Further, on the rear surface of the antenna cover 53, outlets 54 and 55 are formed at positions facing the second and third wiring insertion holes 48 and 49, and the outlets 54 and 55 are respectively closed by caps 56. Has been. When using an optional rear illumination lamp or the like, the cap 56 is removed together with the cap 51. Thereby, the wiring 50 can be taken out through the outlets 54 and 55.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. In the work site or the like, for example, the operator lowers the traveling body 2 forward and backward by tilting the traveling lever in the cab 11. Then, when performing excavation work or the like of earth and sand, the working device 4 is operated by tilting the working lever, or the upper swing body 3 is swung.

  However, according to the present embodiment, since the press cover 38 includes the left rear panel 39 and the rear cross beam cover 40, the rear cross beam member 31, the rear pillar 24, and the upper pillar 26 are located at the upper rear side on the door 34 side. The rear connecting member 32 that connects the two can be covered by the left rear panel 39, and the rear cross beam member 31 can be covered by the rear cross beam cover 40 connected to the left rear panel 39. For this reason, when the cab 11 is viewed from the door 34 side, the left rear panel 39 can cover all of the left rear connection member 32, so that a discontinuous portion is generated in the rear side of the door 34 that is easy to see from the outside. Disappear. In addition, even when the rear connecting member 32 is formed of a casting that is different from the left rear panel 39 or the like, the rear connecting member 32 is not exposed to the outside, so that the appearance of the cab 11 can be improved. it can. Further, when the cab 11 is viewed from the door 34 side, the rear cross beam cover 40 can be connected at a position hidden by the left rear panel 39, so that these connecting portions can be made inconspicuous and appearance quality is improved. can do.

  On the other hand, the right rear connecting member 33 located on the opposite side of the door 34 in the left and right directions is not covered by the press cover 38 and is partially exposed. Generally, since the working device 4 is provided on the opposite side of the cab 11 to the door 34, it is difficult to see from the outside, and the influence on the aesthetic appearance of the cab 11 is small. For this reason, in the present embodiment, from the viewpoint of reducing the manufacturing cost, the rear connecting member 33 is exposed as it is, and the rear cross beam cover 40 and the right rear cover 41 are smoothly connected.

  In addition, the rear horizontal beam cover 40 is provided with an antenna receiving recess 45 that is recessed from the surroundings, and the antenna receiving recess 45 is covered with a resin antenna cover 53, so that the GPS antenna 47 is disposed outside the rear horizontal beam cover 40. Can be arranged. For this reason, even when the rear lateral beam member 31 is covered by the metal rear lateral beam cover 40, radio waves are not blocked by the rear lateral beam cover 40, and the GPS antenna 47 provided in the antenna accommodating recess 45 is made of a resin antenna cover. The radio wave can be received through 53.

  In addition, since the antenna housing recess 45 that is recessed from the periphery is covered by the antenna cover 53, the antenna cover 53 can be attached to the upper surface portion 40A and the rear surface portion 40B of the rear cross beam cover 40 in a smoothly continuous state. For this reason, compared with the case where the GPS antenna 47 is mounted in a state of protruding from the surroundings, the GPS antenna 47 does not come into contact with an external obstacle and the GPS antenna 47 can be reliably protected. Further, since the antenna cover 53 can be attached in a closed state, it is possible to prevent theft.

  Furthermore, since the antenna receiving recess 45 is provided with the wiring insertion holes 48 and 49 and the antenna cover 53 is provided with the outlets 54 and 55, the inside of the rear transverse beam cover 40 is formed through the wiring insertion holes 48 and 49 and the outlets 54 and 55. The wiring 50 arranged on the outside can be taken out to the outside. For this reason, for example, even when a rear illumination lamp or a rotating lamp is attached to the upper part of the cab 11, the wiring 50 can be easily connected to these illumination lamps or the like.

  In the above embodiment, the front pillars 22 and 23 and the upper pillars 26 and 27 are connected using the front connecting members 28 and 29. For example, the front pillars and the upper pillars are continuous. You may form with one steel pipe.

  In the above embodiment, the rear pillars 24 and 25, the upper pillars 26 and 27, and the rear cross beam member 31 are connected using the rear connecting members 32 and 33. For example, the rear pillars are omitted from the rear pillar. The upper pillar and the rear cross beam member may be directly connected.

  In the embodiment, the door 34 is provided on the left side of the cab 11. However, the present invention is not limited to this. For example, when a cab is disposed on the right side of the upper swing body as in a hydraulic crane, a door may be provided on the right side of the cab. In this case, for example, since the rear connecting member that connects the right rear pillar, the upper pillar, and the rear cross beam member constitutes the door side connecting portion, the decorative cover includes a right rear panel and a rear cross beam cover as a door side rear panel. Is.

  Moreover, in the said embodiment, although it was set as the structure which forms the antenna accommodation recessed part 45 in the rear part cross beam cover 40, it is good also as a structure which abbreviate | omits the antenna accommodation recessed part 45. FIG.

Furthermore, in the above-described embodiment, the cab 11 of the hydraulic excavator 1 is described as an example of the cab for the construction machine. However, the present invention is not limited to this, and is applicable to other cabs for construction machines such as a hydraulic crane. can do.

1 Excavator (construction machine)
DESCRIPTION OF SYMBOLS 11 Cab 12 Cab frame 13 Base frame 22, 23 Front pillar 24, 25 Rear pillar 26, 27 Upper pillar 31 Rear cross beam member 32 Rear connection member (door side connection part)
38 Press cover (decorative cover)
39 Left rear panel (door side rear panel)
40 Rear transverse beam cover 45 Antenna housing recess 47 GPS antenna (antenna)
48, 49 Wiring insertion hole 53 Antenna cover 54, 55 Exit

Claims (3)

A cab frame forming a framework structure, and a door provided on the right side surface or the left side surface of the cab frame,
The cab frame includes a lower base frame, left and right front pillars that are erected upward from the front end side of the base frame in a left and right direction, and a rear of the base frame. Left and right rear pillars erected upward from the end side in the left and right direction, and the left and right directions to connect the upper end side of each rear pillar to the upper end side of each front pillar A cab for a construction machine comprising: left and right upper pillars extending in the front and rear directions spaced apart from each other; and a rear cross beam member extending in the left and right directions to connect the upper ends of the left and right rear pillars In
Located on the left and right door side of the cab frame, the door side end of the rear cross beam member, the upper end side of the rear pillar located on the door side, and the upper pillar located on the door side The door side connecting part to connect
A decorative cover is provided to cover the door side connecting portion and the rear cross beam member,
The decorative cover includes a door-side rear panel that covers the door-side connecting portion and forms a side surface behind the door, and a rear cross-beam cover that is connected to the door-side rear panel and covers the rear cross-beam member. A cab for construction machinery characterized by this.   The construction machine cab according to claim 1, wherein the rear horizontal beam cover is provided with an antenna receiving recess that is recessed from the periphery to receive the antenna, and the antenna receiving recess is covered with a resin antenna cover.   The antenna receiving recess is provided with a wiring insertion hole for inserting a wiring arranged in the rear cross beam cover, and the antenna cover is provided with an outlet for taking out the wiring from the wiring insertion hole to the outside. Item 3. The construction machine cab according to item 1 or 2.

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