Construction machinery cabin
The construction machinery cab design addresses storage and visibility issues by using inclined cross members and symmetrical structural elements, ensuring sufficient space for the front window and maintaining rigidity and visibility.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- PRESS KOGYO CO LTD
- Filing Date
- 2022-08-26
- Publication Date
- 2026-06-29
AI Technical Summary
Construction machinery cabs face challenges in securing sufficient storage space for raised front windows while maintaining rigidity and visibility, particularly due to interference between the cross members and the flipped-up windows.
The design incorporates inclined cross members positioned lower than the guide rails, ensuring the front window can be fully raised without interference and includes additional structural elements to maintain rigidity and visibility, such as symmetrical center pillars and beams.
This configuration secures ample storage space for the front window, enhances visibility, and meets rigidity standards by distributing load forces effectively, optimizing the balance between structural integrity and operational needs.
Smart Images
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Abstract
Description
Technical Field
[0005]
[0001] The present disclosure relates to a cab of a construction machine.
Background Art
[0002] Generally, a cab in a construction machine such as a hydraulic excavator includes a cab frame that forms its skeleton. The cab frame includes left and right front pillars, left and right rear pillars, a center pillar located on one side of the left and right, and roof rails that connect the front pillars and the rear pillars on each of the left and right.
[0003] In addition, in order to improve the rigidity of the cab, the cab frame may include a cross member that spans and connects the rear pillar and the center pillar located on the other side of the left and right.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0008] According to one aspect of this disclosure, The left and right front pillars, The left and right rear pillars, The first center pillar is located on one side, either left or right, A first cross member connects the rear pillar and the first center pillar, which are located on the left and right sides, A roof rail connecting the front pillar and the rear pillar on each of the left and right sides, Guide rails are provided along the front pillar and the roof rail on each of the left and right sides, A hinged front window that can move along the guide rails on the left and right, Equipped with, The first cross member is positioned lower than the portion of the guide rail that is provided along the roof rail. A construction machine cabin with the following characteristics is provided.
[0009] Preferably, the first cross member is inclined so as to be downward at the front.
[0010] Preferably, the cabin is The second center pillar located on the left and right sides, A second cross member connects the rear pillar and the second center pillar, which are located on one side of the left or right side, Equipped with, The second cross member is positioned lower than the portion of the guide rail that is provided along the roof rail.
[0011] Preferably, the second cross member is inclined so as to be downward at the front.
[0012] Preferably, the second cross member intersects the first cross member.
[0013] Preferably, the cabin a center bracket extending downward from the roof rail on the other side of the left and right, a second cross member that spans and connects the rear pillar located on one side of the left and right and the center bracket, and includes The second cross member is located at a position lower than the portion of the guide rail provided along the roof rail.
[0014] Preferably, the second cross member is inclined so as to slope downward and forward.
[0015] Preferably, the second cross member intersects the first cross member.
[0016] Preferably, one side of the left and right is the side opposite to the side where the boom of the construction machine is present with respect to the cabin.
Advantages of the Invention
[0017] According to the present disclosure, a sufficient storage space for the popped-up front window can be secured.
Brief Description of the Drawings
[0018] [Figure 1] It is a front view schematically showing a construction machine according to a first embodiment. [Figure 2] It is a perspective view schematically showing a cabin frame of the first embodiment. [Figure 3] It is a plan view and a longitudinal left side view of a cabin frame of the first embodiment. [Figure 4] It is a left side cross-sectional view at the IV-IV position in FIG. 3(A). [Figure 5] It is a left side cross-sectional view at the V-V position in FIG. 3(A). [Figure 6] This is a schematic perspective view showing the cabin frame of the second embodiment. [Figure 7] These are a plan view and a left side cross-sectional view of the cabin frame of the second embodiment. [Figure 8] This is a schematic perspective view showing the cabin frame of the third embodiment. [Modes for carrying out the invention]
[0019] The embodiments of this disclosure will be described below with reference to the attached drawings. It should be noted that this disclosure is not limited to the embodiments described below.
[0020] [First Embodiment] Figure 1 schematically shows a construction machine according to the first embodiment. The construction machine 1 in this embodiment is a hydraulic excavator and comprises a lower traveling body 2 and an upper rotating body 3 that is mounted on the lower traveling body 2 so as to be rotatable around a vertical axis.
[0021] The lower traveling body 2 is equipped with left and right crawlers 5. The upper rotating body 3 is equipped with a rotating frame 6, a cabin 7 located on the left side (one of the left and right sides) of the rotating frame 6, an excavation attachment 4 located at the front and left / right center of the rotating frame 6, and a machine room 8 located on the right side (the other of the left and right sides) of the rotating frame 6.
[0022] The excavation attachment 4 comprises a boom 9 mounted on a slewing frame 6 so as to be able to be raised and lowered, an arm (not shown) rotatably mounted at the tip of the boom 9, and a bucket (not shown) rotatably mounted at the tip of the arm. The excavation attachment 4 also comprises a boom cylinder 10 for raising and lowering the boom 9 relative to the slewing frame 6, an arm cylinder (not shown) for rotating the arm relative to the boom 9, and a bucket cylinder (not shown) for rotating the bucket relative to the arm.
[0023] The right side is the side of the cabin 7 where the boom 9 is located, i.e., the boom side. Conversely, the left side is the opposite side of the cabin 7 where the boom 9 is located, i.e., the anti-boom side.
[0024] Figure 2 schematically shows the cabin frame 11, which forms the framework of the cabin 7. Various panels, side doors, windows, fittings, etc. (not shown) are attached to this cabin frame 11 to constitute the cabin 7. The cabin frame 11 is generally constructed symmetrically.
[0025] The cabin frame 11 comprises left and right front pillars 12 (12L, 12R) erected at its foremost end, left and right rear pillars 13 (13L, 13R) erected at its rearmost end, and a center pillar (first center pillar) 14, or left center pillar 14L, located on the left side between the left front pillar 12 and the left rear pillar 13L. In this embodiment, there is no center pillar on the right side in order to improve visibility.
[0026] Each of these pillars is erected upwards on a rectangular frame-shaped floor member 15 within the cabin frame 11.
[0027] The cabin frame 11 also includes roof rails 16 (16L, 16R) on both the left and right sides, connecting the upper ends of the front pillars 12 and the rear pillars 13, respectively. The upper end of the left center pillar 14L is connected to the left roof rail 16L.
[0028] The cabin frame 11 also includes a front header 17 that connects the left and right connection points where the front pillar 12 and the roof rail 16 are connected, a rear upper cross member 18 that connects the upper ends of the left and right rear pillars 13, and a rear middle cross member 19 that connects the middle sections of the left and right rear pillars 13.
[0029] The cabin frame 11 also includes a center cross member 20 that connects the middle sections of the left and right roof rails 16. The position of the center cross member 20 in the front-rear direction is equal to the position of the left center pillar 14L.
[0030] The cabin frame 11 also includes a left upper side member 21L and a left lower side member 22L that connect the left center pillar 14L and the left rear pillar 13L. The left upper side member 21L and the left lower side member 22L are inclined downwards towards the front, with the left lower side member 22L being more inclined than the left upper side member 21L.
[0031] The left lower side member 22L and the rear middle cross member 19 are connected to the left rear pillar 13L at the same height.
[0032] The cabin frame 11 also includes a right side beam 23R that connects the middle section of the right rear pillar 13R to the right edge of the floor member 15. The right side beam 23R is inclined downwards at the front and connects the right rear pillar 13R and the floor member 15 in a diagonal brace-like manner.
[0033] In particular, in this embodiment, a first cross member 50 is provided that spans and connects the right rear pillar 13R and the left center pillar 14L in order to improve the rigidity of the cabin 7. This will be described in detail later.
[0034] The aforementioned rear pillar 13, center pillar 14, front header 17, rear upper cross member 18, rear middle cross member 19, center cross member 20, left upper side member 21L, left lower side member 22L, right side beam 23R, and first cross member 50 are made of metal (e.g., steel) and formed from rectangular cross-section square pipes. On the other hand, the left and right front pillars 12 and roof rails 16 are integrally and continuously formed from metal (e.g., steel) pipes with irregular cross-sections, as will be described later.
[0035] In this cabin frame 11, the front section is closed by a front window 24 as shown in Figure 1. The front window 24 comprises a flip-up (flip-up) upper front window 25 and a removable lower front window 26. By flipping up the upper front window 25 and then pulling the lower front window 26 upward to remove it, the entire front of the cabin 7 can be opened. This is advantageous when further forward visibility is needed or when external workers want to access the cabin more directly.
[0036] Furthermore, the rear portion of the cabin frame 11 is closed off by a rear panel and a rear window (not shown). The right side portion of the cabin frame 11 is closed off by a right side panel and a right window (not shown).
[0037] On the left side of the cabin frame 11, the space enclosed by the left front pillar 12L, the left center pillar 14L, and the left roof rail 16L is closed off by an openable side door (not shown). Furthermore, of the space enclosed by the left center pillar 14L, the left rear pillar 13L, and the left roof rail 16L, the space sandwiched between the left upper side member 21L and the left lower side member 22L is closed off by a left window (not shown), and the remaining space is closed off by a left side panel (not shown).
[0038] The front upper window 25, front lower window 26, right window, left window, and rear window are generally formed from transparent glass plates.
[0039] The ceiling of the cabin frame 11 is closed off by a roof panel (not shown).
[0040] Figures 3(A) and (B) show a plan view and a left longitudinal section view of the cabin frame 11. As shown, guide rails 27 are provided along the front pillar 12 and roof rail 16. The front upper window 25 is movable along these guide rails 27. Although only the right guide rail 27 is shown in the figure, a similar guide rail 27 is provided symmetrically on the left side as well. The front lower window 26 is omitted.
[0041] When the front upper window 25 is raised, it is guided by the guide rail 27 and moves sequentially through the positions indicated by symbols a, b, c, d, e, and f. Symbol a indicates the initial position in which the front upper window 25 closes the front of the cabin. From this initial position a, the front upper window 25 moves through positions b, c, d, and e to the final position f. At the final position f, the front upper window 25 is positioned horizontally and approximately parallel to the roof panel on the underside of the ceiling surface, that is, directly below the roof panel. In this way, the front upper window 25 is stored in the storage space above the ceiling.
[0042] The front pillar 12 and the roof rail 16 are a single, continuous piece, and are bent at their connection point.
[0043] On the other hand, the guide rail 27 is roughly L-shaped in side view. The guide rail 27 has a vertical section 27A along the front pillar 12 and a horizontal section 27B along the roof rail 16. The vertical section 27A and the horizontal section 27B are connected to each other separately. The horizontal section 27B is located slightly below the front header 17 and the center cross member 20. The horizontal section 27B extends from the front end of the roof rail 16 to a position behind the center cross member 20 and the left center pillar 14L, and in front of the rear pillar 13.
[0044] Alternatively, the front pillar 12 and the roof rail 16 may be connected to each other as separate components. The vertical section 27A and the horizontal section 27B of the guide rail 27 may be integral and continuous, and be bent at their connection point.
[0045] Figures 4 and 5 show the left-side cross-sectional views at positions IV-IV and VV in Figure 3(B). As shown in Figure 4, the cross-sectional shape of the front pillar 12 (left front pillar 12L) at the front left end of the cabin is generally rectangular, but it has an irregular shape with some rounded and concave sections. The cross-sectional shape of the foremost and left and right outer corners 12A is curved to take the design surface into consideration. Furthermore, recesses 12B are formed on the left and right outer side surfaces to accommodate the window frame members 28 of the side doors.
[0046] The front pillar 12 has inner surface portions 12C on the left and right sides, and a guide rail 27 with a U-shaped cross-section is fixed to these inner surface portions 12C. On the other hand, the front upper window 25 is provided with wheels 29 that protrude outwards on the left and right sides, and as these wheels 29 roll within the guide rail 27, the front upper window 25 can be guided and moved by the guide rail 27. As shown in Figure 3(B), the wheels 29 are provided at the lower and upper ends of the front upper window 25 in its initial position a.
[0047] The front pillar 12 is provided with a lip portion 12D that covers the left and right outer side edges of the front upper window 25 and the guide rail 27 from the front. A hollow rubber weatherstrip 30 is attached to the rear or back surface of the lip portion 12D via a sealing plate (not shown). This weatherstrip 30 is in close contact with the front upper window 25 in its initial position a to prevent water from entering.
[0048] In the diagram, the symbol B indicates the blind spot in the forward view when looking forward from a predetermined eye point inside the cabin. A universal challenge in cabins is to minimize such blind spots B.
[0049] Reducing the cross-sectional area of the front pillar 12 is effective in reducing blind spot B, but this reduces the rigidity of the front pillar 12. Therefore, a shape for the front pillar 12, and consequently the shapes of each pillar and the overall structure of the cabin, that optimizes the balance between rigidity and visibility is desirable.
[0050] As shown in Figure 5, the cross-sectional shape of the roof rail 16 (left roof rail 16L) on the left side of the cabin ceiling is the same as that of the front pillar 12, except that its orientation is approximately 90° different. This is because the roof rail 16 is integrally molded and bent with the front pillar 12. The roof rail 16 also has the same corner portion 16A, recess 16B, inner surface portion 16C, and lip portion 16D as described above. In this ceiling portion, the orientation of the guide rail 27 and the window frame member 28 is changed by approximately 90°. A part 31 of the ceiling panel is attached to the lip portion 16D. The guide rail 27 is attached to the inner surface portion 16C such that its lower surface and the lower surface of the roof rail 16 are approximately flush.
[0051] Regarding the right side, a structure symmetrical to the left side, as shown in Figures 4 and 5, is provided, so the explanation will be omitted.
[0052] In Figure 3, the point indicated by reference numeral 32 represents the seat index point (SIP, seat reference point) within the cabin, and the line indicated by reference numeral 33 represents the boundary line of the minimum space as defined by ISO 3411. As shown in Figure 3(B), the front upper window 25 moves inside the boundary line 33 during its movement from the initial position a to the final position f, but is positioned above the boundary line 33 at the final position f. The front upper window 25 at the final position f is then locked by a locking mechanism (not shown).
[0053] As can be seen in Figure 5, the front upper window 25 at the final position f is positioned such that its lower surface is substantially flush with the lower surfaces of the roof rail 16 and the guide rail 27.
[0054] In a cabin with this configuration, as shown in Figure 3(B), the front upper window 25 at the final position f is positioned along the guide rail 27 and the roof rail 16, extending to a position behind the left center pillar 14L.
[0055] On the other hand, the conventional cross member that spans and connects the right rear pillar and the left center pillar has its entire length positioned at the same height as the guide rails and roof rails. As a result, there is a risk that it may interfere with the cross member when the front upper window is flipped up, preventing sufficient storage space for the front upper window.
[0056] Therefore, as shown in Figures 2 and 3, the first cross member 50 in this embodiment is positioned lower than the portion of the guide rail 27 provided along the roof rail 16, i.e., the horizontal portion 27B. This prevents the raised front upper window 25 from interfering with the cross member and ensures sufficient storage space for the front upper window 25.
[0057] The front upper window 25, when flipped up and positioned in its final position f, is positioned to cover the front of the first cross member 50 from above, preventing interference with the first cross member 50. In other words, the front of the first cross member 50 passes under the front upper window 25 when flipped up and positioned in its final position f, preventing interference with the front upper window 25. In this way, a large storage space is created between the roof panel and the first cross member 50 to accommodate the front upper window 25 in its final position f.
[0058] In this embodiment, the first cross member 50 is inclined to be downward at the front. This prevents interference with the front upper window 25 with the minimum necessary height reduction, and minimizes the loss of interior space due to the lowering of the first cross member 50.
[0059] In this embodiment, the rear end of the first cross member 50 is connected to the right rear pillar 13 at a position slightly below the position of the right rear pillar 13 where the right roof rail 16 and the rear upper cross member 18 are connected. The front end of the first cross member 50 is connected to the left center pillar 14L at a position slightly above the boundary line 33 of the minimum space. Therefore, the first cross member 50 is positioned above the minimum space so as not to intrude beyond the boundary line 33 into the minimum space.
[0060] In the plan view shown in Figure 3(A), the first cross member 50 is inclined with respect to the left-right direction (vehicle width direction). Therefore, compared to the case where it is parallel to the left-right direction so as to overlap with the center cross member 20, the length over which the first cross member 50 crosses the minimum space is shortened, which is advantageous in securing head clearance for occupants.
[0061] In this embodiment, the front upper window 25, which has a constant width, moves along the left and right guide rails 27. Therefore, the distance between the left and right guide rails 27 is constant, and accordingly, the distance and cross-sectional shape of the left and right front pillars 12 and roof rails 16 are also constant. On the other hand, in order to reduce the blind spot B of the forward view, the cross-sectional area of the left and right front pillars 12 and roof rails 16 is reduced, and in particular, the width from left to right, excluding the lip portion 16D, is made smaller than the width from front to back.
[0062] Consequently, the rigidity of the front pillar 12 and roof rail 16 tends to be reduced, and if no measures are taken, there is a risk that the cabin will not be able to meet the required rigidity.
[0063] In particular, the cabin must meet the ROPS (Roll-Over Protective Structures) standard set by ISO. The ROPS standard is a standard concerning the degree of deformation of the cabin when a lateral force, i.e., a ROPS load, as shown by the symbol F1 in Figure 2 is applied to the cabin. The ROPS load F1 is applied near the midpoint of the length of the left roof rail 16L and near the left center pillar 14L.
[0064] As mentioned above, reducing the cross-sectional area of the left and right front pillars 12 and roof rails 16 tends to reduce the rigidity of the front half of the cabin located in front of the left center pillar 14L. Therefore, in order to withstand the ROPS load F1, it is necessary to increase the rigidity of the rear half of the cabin from the left center pillar 14L onward to compensate for the decrease in rigidity of the front half.
[0065] In this sense, providing the first cross member 50 is advantageous because it leads to increased rigidity in the rear half. In this embodiment, the ROPS load F1 can be transmitted to the right rear pillar 13 by the first cross member 50, thus distributing the ROPS load F1 and improving ROPS rigidity. Furthermore, since the front end of the first cross member 50 is connected to the left center pillar 14L near the load point of the left roof rail 16L that receives the ROPS load F1, it is advantageous for transmitting and distributing the ROPS load F1 to the right rear pillar 13.
[0066] In addition, this embodiment employs the following features to achieve a balance between visibility and rigidity.
[0067] The cross-sectional area of the front pillar 12 is made smaller than that of the left center pillar 14L and the rear pillar 13. This allows for improved forward visibility while maintaining the necessary rigidity in the rear half of the vehicle.
[0068] The cross-sectional area of the roof rail 16 is made smaller than that of the left center pillar 14L and the rear pillar 13. This allows for improved upward visibility around the roof rail 16 while ensuring the necessary rigidity in the rear section.
[0069] The cross-sectional area of the left center pillar 14L is made smaller than that of the rear pillar 13. This allows for improved lateral visibility around the left center pillar 14L while ensuring the necessary rigidity in the rear section.
[0070] By reducing the cross-sectional area of the front pillar 12 and roof rail 16, the distance between the left and right guide rails 27 can be widened, and the width of the front upper window 25 can be increased, thereby improving forward visibility.
[0071] To prevent the left center pillar 14L from protruding inward from the left roof rail 16 and interfering with the front upper window 25, the width of the left center pillar 14L is made as narrow as that of the left roof rail 16. In addition, to ensure the rigidity of the left center pillar 14L, its front-to-back width is made larger than its left-to-right width.
[0072] Since the front upper window 25 does not reach the rear pillar 13, the width of the rear pillar 13 is independent of the width of the front upper window 25 and the distance between the left and right guide rails 27. Therefore, in order to improve rigidity, the width of the rear pillar 13 is made larger than the width of the front pillar 12, the roof rail 16, and the left center pillar 14L.
[0073] [Second Embodiment] Next, a second embodiment of the present disclosure will be described. Parts similar to those in the first embodiment will be denoted by the same reference numerals in the figures and their descriptions will be omitted. The following description will primarily focus on the differences from the first embodiment.
[0074] As shown in Figures 6 and 7, in the second embodiment, the cabin frame 11 includes a center pillar (second center pillar) 14, or right center pillar 14R, located on the right side and situated between the right front pillar 12R and the right rear pillar 13R. The cabin frame 11 also includes a second cross member 52 that spans and connects the left rear pillar 13L and the right center pillar 14R. The second cross member 52 is positioned lower than the portion of the guide rail 27, or horizontal portion 27B, provided along the roof rail 16. This also prevents the raised front upper window 25 from interfering with the cross member and ensures sufficient storage space for the front upper window 25.
[0075] The front upper window 25, when flipped up and positioned in its final position f, is positioned to cover the front of the second cross member 52 from above, preventing interference with the second cross member 52. In other words, the front of the second cross member 52 passes under the front upper window 25 when flipped up and positioned in its final position f, preventing interference with the front upper window 25. In this way, a large storage space is created between the roof panel and the second cross member 52 to accommodate the front upper window 25 in its final position f.
[0076] Similar to the first cross member 50, the second cross member 52 is formed from a rectangular pipe made of straight metal (e.g., steel) with a rectangular cross-section.
[0077] In this embodiment, the right center pillar 14R is configured and positioned symmetrically with respect to the left center pillar 14L. The second cross member 52 is also configured and positioned symmetrically with respect to the first cross member 50. Therefore, the second cross member 52 is inclined to slope downwards towards the front. The second cross member 52 intersects with the first cross member 50, and is connected in an X-shape. As a result, the first cross member 50 and the second cross member 52 together form a cross member 54 that slopes downwards towards the front in a plan view, as shown in Figure 7(A).
[0078] As described above, the second cross member 52 is tilted downwards towards the front, so interference with the front upper window 25 can be avoided with the minimum necessary height reduction, and the loss of interior space due to the reduction of the second cross member 52 can be minimized.
[0079] The rear end of the second cross member 52 is connected to the left rear pillar 13L at the same height as the rear end of the first cross member 50. The front end of the second cross member 52 is connected to the right center pillar 14R at the same height as the front end of the first cross member 50. Therefore, the second cross member 52 is positioned above the minimum space so as not to intrude beyond the boundary line 33 into the minimum space.
[0080] In the plan view shown in Figure 7(A), the second cross member 52 is inclined with respect to the left-right direction (vehicle width direction). Therefore, compared to the case where it is parallel to the left-right direction so as to overlap with the center cross member 20, the length over which the second cross member 52 crosses the minimum space is shortened, which is advantageous in securing head clearance for occupants.
[0081] By connecting the second cross member 52 to the first cross member 50 in a cross shape, an X-shaped cross member 54 is formed overall. This further improves the rigidity of the rear half of the cabin, while simultaneously reducing the rigidity of the front half of the cabin and decreasing the cross-sectional area of the front pillar 12 and roof rail 16, thereby improving visibility.
[0082] In this embodiment, the right center pillar 14R is provided, which worsens the visibility to the right side compared to the first embodiment. However, since there is originally a boom 9 on the right side of the cabin, the impact on the visibility to the right side is relatively small. In this embodiment, the right side beam 23R connects the right rear pillar 13R and the floor member 15 at the base of the right center pillar 14R in a diagonal bracing manner.
[0083] In this embodiment, the height position of the rear upper cross member 18 is lowered compared to the first embodiment, to the same height position as the rear ends of the first cross member 50 and the second cross member 52. The right upper side member 21R is provided symmetrically with the left upper side member 21L.
[0084] [Third Embodiment] As shown in Figure 8, the third embodiment is substantially the same as the second embodiment, but differs in the following respect. In the third embodiment, instead of the right center pillar 14R, a center bracket, i.e., the right center bracket 56R, is provided, which extends downward from the right roof rail 16. The front end of the second cross member 52 is connected to the lower end of the right center bracket 56R.
[0085] The right center bracket 56R is formed from a straight metal (e.g., steel) rectangular pipe with a rectangular cross-section. Its upper end is connected perpendicularly to the right roof rail 16. The right center bracket 56R is short and does not reach the floor member 15, so it does not form a pillar, but rather a dedicated bracket for connecting the second cross member 52.
[0086] According to this embodiment, since it is equivalent to removing most of the lower part of the right center pillar 14R in the second embodiment, the right-side visibility can be improved compared to the second embodiment.
[0087] Although embodiments of this disclosure have been described in detail above, various other embodiments and modifications of this disclosure are conceivable.
[0088] (1) For example, this disclosure can be applied to construction machinery other than hydraulic excavators.
[0089] (2) In the first embodiment, a right center pillar 14R as in the second embodiment may be provided. In this case, the first cross member 50 may be inclined in the opposite direction in plan view, and the front end of the first cross member 50 may be connected to the right center pillar 14R.
[0090] (3) In the first embodiment, a right center bracket 56R as in the third embodiment may be provided. In this case, the first cross member 50 may be tilted in the opposite direction in plan view, and the front end of the first cross member 50 may be connected to the right center bracket 56R.
[0091] (4) In the second and third embodiments, the first cross member 50 and the second cross member 52 may not intersect, but may be spaced apart or adjacent to each other in the height direction and installed at different levels.
[0092] (5) In the above embodiment, the front window 24 is divided vertically into an upper front window 25 and a lower front window 26, and only the upper front window 25 is of the flip-up type. However, the embodiment is not limited to this, and a single, undivided front window may also be of the flip-up type.
[0093] The configurations of each embodiment and each variation described above can be combined in part or in whole, as long as there is no particular contradiction. The embodiments of this disclosure are not limited to those described above, but include any variations, applications, and equivalents that are encompassed within the spirit of this disclosure as defined by the claims. Therefore, this disclosure should not be constrained and may be applied to any other art that falls within the scope of the spirit of this disclosure. [Explanation of symbols]
[0094] 1. Construction machinery 7 cabins 9 Boom 12 Front pillar 13 Rear pillar 14 Center pillar 16 Roof rails 25 Front upper window 27 Guide rails 27B Horizontal section 50 First Crossmember 52. Second Crossmember 56R Right Center Bracket
Claims
1. The left and right front pillars, The left and right rear pillars, The first center pillar is located on one side, either left or right, A first cross member connects the rear pillar and the first center pillar, which are located on the left and right sides, A roof rail connecting the front pillar and the rear pillar on each of the left and right sides, Guide rails are provided along the front pillar and the roof rail on each of the left and right sides, A hinged front window that can move along the guide rails on the left and right, Equipped with, The first cross member is positioned lower than the portion of the guide rail provided along the roof rail, The front window, when flipped up and positioned in its final position, covers the front part of the first cross member from above. A construction machine cabin characterized by the following features.
2. The first cross member is inclined to be downward sloping towards the front. The cabin of the construction machine according to claim 1.
3. The second center pillar located on the left and right sides, A second cross member connects the rear pillar and the second center pillar, which are located on one side of the left or right side, Equipped with, The second cross member is positioned lower than the portion of the guide rail that is provided along the roof rail. The cabin of the construction machine according to claim 1.
4. The second cross member is inclined to be downward sloping towards the front. The cabin of the construction machine according to claim 3.
5. The second cross member intersects with the first cross member. The cabin of the construction machine according to claim 3.
6. A center bracket extending downward from the roof rail on the other side, A second cross member connects the rear pillar and the center bracket, which are located on one side of the left or right side, Equipped with, The second cross member is positioned lower than the portion of the guide rail that is provided along the roof rail. The cabin of the construction machine according to claim 1.
7. The second cross member is inclined to be downward sloping towards the front. The cabin of the construction machine according to claim 6.
8. The second cross member intersects with the first cross member. The cabin of the construction machine according to claim 6.
9. One side, left or right, is the side opposite to the cabin where the boom of the construction machine is located. The cabin of the construction machine according to claim 1.