JP4287804B2 - Work machine cab and work machine - Google Patents

Description

  The present invention relates to a work machine cab and a work machine that can appropriately secure a driver space in a cab body.

  2. Description of the Related Art Conventionally, for example, a cab for a working machine is known in which a rear portion of a cab body is supported by a vertical portion near a driver's seat rear surface of a body frame that is an upper swing body by left and right mounting devices (see, for example, Patent Document 1).

  However, in this cab for a work machine, the rear part of the cab body is directly supported by the mount device itself, so that there is a problem that the cab body tends to tilt when the work machine falls.

Therefore, as a solution to such a problem, for example, as shown in FIG. 4, a substantially rectangular plate-like floor body 2 provided through a vibration isolating means 1 on a revolving body (not shown) of the airframe, 2. Description of the Related Art A work machine cab 4 is known that includes a cab body 3 that is directly fixed to the floor body 2 at its entire lower portion.
Japanese Utility Model Publication No. 7-1353 (2nd page, Fig. 1)

  However, the work machine cab 4 shown in FIG. 4 has a problem that the cab body 3 is easily deformed based on a lateral load acting on the upper end of the cab body 3 when the work machine falls.

  The present invention has been made in view of such points, and the cab main body is difficult to tilt and the cab main body is not easily deformed when the work machine falls, and the cab for the working machine that can appropriately secure a driver space in the cab main body and It is an object of the present invention to provide a working machine having the same.

  The work machine cab according to claim 1 is a floor body provided on the airframe via vibration isolation means, a standing body standing on the rear of the floor body, and a floor fixing directly fixed to the floor body. And a cab body having a cutout portion formed in a shape corresponding to the standing body and directly fixed to the standing body at the lower part of the rear side.

  And since the floor fixing part of the cab body is directly fixed to the floor body, and the notch part of the cab body is directly fixed to the standing body, the cab body is difficult to tilt when the work machine falls down and the cab body Is difficult to deform, and a driver space in the cab body is appropriately secured.

The work machine cab according to claim 2 is the work machine cab according to claim 1, wherein the standing body is configured by a frame-shaped member that is erected at the rear portion of the floor body, and the frame-shaped member is: A first vertical hook part and a second vertical hook part, which are respectively provided upright at the left and right ends of the rear part of the floor body and opposed to each other in the front-rear direction; the upper end part of the first vertical hook part; and the second vertical hook part It has left and right upper horizontal flanges that connect the upper ends, and upper horizontal flanges that connect the upper ends of the second vertical flanges on the right side and the upper ends of the second vertical hooks on the left side. is there.

  And the intensity | strength of a standing body improves by comprising a standing body by the frame-shaped member standingly arranged by the rear part of the floor body.

  According to a third aspect of the present invention, there is provided a work machine including the machine body, the work machine cab according to the first or second aspect provided in the machine body, and a work device provided in the machine body.

  Since the cab body is not easily tilted and the cab body is not easily deformed when the work machine falls, it is possible to appropriately secure a driver space in the cab body even if the work machine falls.

  According to the first aspect of the present invention, the floor fixing portion of the cab body is directly fixed to the floor body, and the notch portion of the cab body is directly fixed to the standing body. The cab body is not easily tilted and the cab body is not easily deformed, so that the driver space in the cab body can be appropriately secured.

  According to the invention which concerns on Claim 2, the strength improvement of a standing body can be aimed at by comprising a standing body by the frame-shaped member standingly arranged by the rear part of the floor body.

  According to the invention of claim 3, since the cab main body is not easily tilted and the cab main body is difficult to be deformed when the work machine falls, it is possible to appropriately secure a driver space in the cab main body even if the work machine falls. it can.

  An embodiment of the present invention will be described with reference to the drawings.

  In FIG. 3, reference numeral 11 denotes a working machine such as a hydraulic shovel. The working machine 11 includes a covered belt type lower traveling body 12 that travels on the ground, and the lower traveling body 12 includes an upper revolving body that is a revolving body. 13 is provided so that it can turn along a horizontal direction. The lower traveling body 12 and the upper turning body 13 constitute the airframe 10.

  A substantially box-shaped work machine cab (operator compartment) 15 having a driver space 14 therein is provided on the left side of the front part of the upper swing body 13 of the machine body. A working device 16 for excavating work is provided on the right side of the front part of the upper swing body 13.

  As shown in FIGS. 1 and 2, the work machine cab 15 includes a floor body (floor) 21 provided on the upper swing body 13 via a plurality of vibration isolation means 20 such as viscous mounts. The floor body 21 is formed in a substantially rectangular plate shape having a longitudinal direction in the front-rear direction, and vibration isolation means 20 is attached to a plurality of locations on the lower surface portion of the floor body 21.

  Further, a standing body 23 composed of a frame-like member 22 is erected integrally with the rear portion of the floor body 21. The frame-like member 22 has a first vertical hook portion 26 and a second vertical hook portion 27 which are respectively provided upright at both the left and right ends of the rear portion of the floor body 21 and are opposed to each other in the front-rear direction. An upper end portion of the first vertical hook portion 26 and an upper end portion of the second vertical hook portion 27 are connected by an upper horizontal hook portion 28. The lower end of the second vertical flange 27 on the right side and the lower end of the second vertical flange 27 on the left side are connected by the lower horizontal flange 29, and the upper end of the second vertical flange 27 on the right side The upper end of the two vertical hooks 27 is connected to the upper horizontal hook 30.

  An opening 31 between the first vertical hook portion 26 and the second vertical hook portion 27 that are opposed to each other in the front-rear direction is closed by a side plate 32. Note that the left side plate 32 can be attached to and detached from the frame-shaped member 22 or can be opened and closed by a hinge or the like, and maintenance of electrical components and the like located in the frame-shaped member 22 is possible. Further, the opening 33 between the second vertical rod portion 27 on the right side and the second vertical rod portion 27 on the left side facing each other is closed by the rear plate 34. The rear plate 34 is formed with a recess 35 for installing an outside air introduction filter for an air conditioner and an outside air introduction hole 35a.

  The work machine cab 15 includes a cab body 41 having a substantially rectangular parallelepiped shape fixed to the floor body 21 and the standing body 23.

  The cab body 41 has a floor adhering portion 42 that is directly adhering to the upper surface portion of the floor body 21 by welding or bolts at the front lower portion, and is formed in a shape corresponding to the standing body 23. A notch 43 is directly attached to the body 23 by welding or bolts or the like at the lower rear side.

  Here, the cab main body 41 is a frame formed by a series of deformed steel pipes that are strength members integrally formed with guide rails that guide the movement of the front window (not shown) from the front to the top on the left and right sides. A substantially box-shaped main frame structure is formed by the member 45, the frame member 46 provided at the rear on both the left and right sides, and the lower frame member 47. A door frame 48 is attached to the left side frame members 45, 46, 47 by a hinge 49 so as to be freely opened and closed. Further, a ceiling 50 is provided between the upper portions of the frame members 45 on the left and right sides. Further, a front header 51 is provided between the upper part and the front part of the left and right frame members 45, and the front opening 52 formed on the lower side and the rear ceiling part 50 are formed via the front header part 51. The upper opening 53 formed in the upper part 53 is partitioned off. The front opening 52 is provided with a front window (not shown) that can move to the lower side of the ceiling portion 50 along the rails 54 provided inside the frame members 45 on both the left and right sides. Is provided with a skylight (not shown) formed of a transparent material such as polycarbonate so that it can be opened and closed with a hinge (not shown) at the rear end as a fulcrum.

  As is clear from FIG. 1, the left and right front column portions 56 formed by a part of the frame member (deformed steel pipe) 45 of the cab body 41 are the left and right rear column portions formed by the frame member 46. Compared with 57, the length in the vertical direction is longer and the strength is stronger. The cab body 41 is provided with a driver's seat and a control device.

  As shown in FIG. 3, the working device 16 has a boom 62 that is rotated by a boom cylinder 61, and an arm 64 that is rotated by an arm cylinder 63 is provided at the tip of the boom 62. A bucket 66 that is rotated by a bucket cylinder 65 is provided at the front end portion.

  Next, the operation and the like of the one embodiment will be described.

  For example, when the work machine 11 falls out of balance, a lateral load acts on the upper end portion of the cab body 41 of the work machine cab 15, and bending moment acts on the front column portion 56 and the rear column portion 57 of the cab body 41. .

  At this time, since the front column part 56 is formed of a deformed steel pipe, the front column part 56 is not greatly bent, and the rear column part 57 also has a bending moment in which the length in the vertical direction acts as short as the standing body 23. Because it is small, it does not bend greatly.

  Further, since the floor fixing portion 42 and the cutout portion 43 of the cab body 41 are directly fixed to the floor body 21 and the standing body 23 without the vibration isolation means 20 such as a viscous mount, the work machine 11 The cab body 41 as a whole does not tilt significantly with respect to the fuselage 10 when the vehicle falls over.

  As described above, according to the embodiment, the cab body 41 is not easily tilted and the cab body 41 is not easily deformed when the work machine 11 is overturned, and the driver space 14 in the cab body 41 can be appropriately secured. For example, safety can be improved.

  Note that the standing body (floor structure) 23 is not limited to the one constituted by the frame-like member 22 fixed to the rear part of the floor body 21, for example, although not shown, it is integrated with the rear part of the floor body 21. It may be provided upright, or may be composed of a plate-like member or a block-like member other than the frame-like member 22.

It is a disassembled perspective view which shows one Embodiment of the cab for work machines of this invention. It is a perspective view of the assembly state of the cab for work machines same as the above. It is a side view of the working machine provided with the cab for working machines same as the above. It is a perspective view of the conventional cab for work machines.

Explanation of symbols

10 Airframe
11 Work machines
15 Cab for work machines
16 Work equipment
20 Anti-vibration measures
21 floor
22 Frame member
23 Standing body
41 Cab body
42 Floor fixing part
43 Notch

Claims (3)

A floor body provided with anti-vibration means on the airframe;
A standing body erected at the rear of the floor body;
A cab main body having a floor fixing portion directly fixed to the floor body at the front lower portion and a notch portion formed at a shape corresponding to the standing body and directly fixed to the standing body at the rear lower portion; A cab for a working machine, comprising: The standing body is composed of a frame-like member that is erected at the rear of the floor body ,
The frame-shaped member is
A first vertical hook part and a second vertical hook part, which are respectively erected on the left and right ends of the rear part of the floor, and are spaced apart from each other in the front-rear direction;
Left and right upper horizontal flanges connecting the upper end of the first vertical hook and the upper end of the second vertical hook;
The cab for a working machine according to claim 1, further comprising an upper horizontal hook portion that connects an upper end portion of the second vertical hook portion on the right side and an upper end portion of the second vertical hook portion on the left side . The aircraft,
A cab for a work machine according to claim 1 or 2, provided on the machine body,
A work machine comprising: a work device provided on the machine body.

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