Cab

Abstract

To provide a cab in which door opening / closing is difficult to be obstructed even when a cab frame and a door are deformed.SOLUTION: A cab 15 is provided with a cab frame 24 and a cab body 20 having an access opening 61 formed in the cab frame 24. A cab 15 is provided with a door 65 opening / closing the access opening 61 of the cab body 20. The door 65 is attached on the cab body 20 so as to be placed opposite to a side surface of the cab frame 24 in a state the access opening 61 is closed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cab for use in a work machine used, for example, in forestry. [Background technology]

[0002] Forestry work involves the use of vehicles that are equipped with forestry attachments attached to work machines based on hydraulic excavators, etc. Harvesters, known as forestry attachments, are set at the base of upright trees, cut the trees with a built-in chainsaw, lay the trees on their side, fell the branches, and cut them to a specified length.

[0003] In forestry work sites, long pieces of timber are moved, and so there are frequent contacts between the work machine and the timber. For this reason, there have been proposals to provide a wire mesh guard in front of the driver's seat to prevent the windshield from being damaged, and to use a polycarbonate windshield that is less susceptible to damage (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5616323 Summary of the Invention [Problem to be solved by the invention]

[0005] The doors of the cabs of typical hydraulic excavators and other equipment are often designed so that when the door is closed, it fits into a recess on the side of the cab frame for airtightness, waterproofing, etc. In cases where the door is fitted into a recess like this, an additional structure is required to prevent the door from opening and the operator from becoming trapped inside the cab when the cab frame is deformed by coming into contact with wood.

[0006] The present invention has been made in consideration of the above-mentioned points, and has an object to provide a cab in which opening and closing of the door is not easily hindered even if the cab frame or door is deformed. [Means for solving the problem]

[0007] The invention described in claim 1 is a cab frame. 、 An entrance formed in this cab frame , and a window formed in the cab frame on the surface adjacent to the entrance A cab body having a door for opening and closing the entrance of the cab body; a window covering member attached to the cab body to cover the window, the edge portion of the window covering member protruding from the cab frame and facing the end portion of the door; The door faces the side of the cab frame when the entrance is closed. At the same time, the cab frame does not face the front, upper, or lower part of the movable side. This is a cab that is attached to the cab body as shown in the figure.

[0008] request request 2 The invention described is as follows: 1 The cab described herein is provided with a seal member that is sandwiched between the door and the side surface of the cab frame when the entrance / exit is closed.

[0009] Claim 3 The invention described herein is as follows: OR 2 The cab described is equipped with a visor disposed on the cab body above the door. Effect of the Invention

[0010] According to the invention described in claim 1, The edge of the window covering member protects the door from contact with wood and the like, thereby suppressing deformation of the door, For example, even if wood or other materials come into contact with the cab frame or door and cause the cab frame or door to become deformed, the door is less likely to be hindered from opening and closing.

[0011] request request 2 According to the described invention, the sealing member can maintain airtightness of the operator's cab.

[0012] Claim 3 According to the described invention, the eaves can prevent rain and the like from entering the cab body. [Brief description of the drawings]

[0013] [Figure 1] FIG. 4(a) is a cross-sectional view taken along line II in FIG. 3, showing one embodiment of a cab according to the present invention, and FIG. 4(b) is a partially enlarged view of FIG. [Diagram 2] FIG. 2 is a perspective view showing the cab with the door open. [Diagram 3] FIG. 2 is a side view showing the cab with the door closed. [Figure 4] FIG. 2 is a front view showing the cab with the door closed. [Diagram 5] FIG. 2 is a side view showing the working machine equipped with the cab. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the present invention will be described in detail based on an embodiment shown in FIGS.

[0015] FIG. 5 shows a working machine 10. The working machine 10 is a forestry working machine also called a forestry machine. The working machine 10 may be one dedicated to forestry, but in this embodiment, a working machine based on a hydraulic excavator will be described as an example. In the illustrated example, the working machine 10 includes a machine body 11 and a working device 12 which is a working arm movably provided on the machine body 11. Each part of the working machine 10 is operated by a fluid pressure actuator. The fluid pressure actuator is, for example, a hydraulic cylinder, a hydraulic motor, etc., and each operation is made possible by supplying and discharging hydraulic oil, which is a working fluid discharged from a pump operated by an engine mounted on the machine body 11, with flow rate and direction controlled by a control valve in response to the operation of the operator.

[0016] In this embodiment, the machine body 11 has a lower traveling body 13 capable of traveling on tracks or tires, an upper rotating body 14 rotatably provided on the lower traveling body 13, and a cab 15 provided on the upper rotating body 14, and a working device 12 is disposed on the upper rotating body 14. An attachment such as a harvester may be attached to the working device 12. Also, in this embodiment, the cab 15 may be disposed movably in the vertical direction with respect to the upper rotating body 14.

[0017] 1 to 4 has a cab body 20. The cab body 20 is provided with a cab frame 24 having a roughly six-sided box shape and made of a structure using square pipe material or deformed steel pipes.

[0018] The cab frame 24 surrounds a driver's seat 25 where an operator sits. That is, a driver's cab with the driver's seat 25 is formed inside the cab frame 24. In the following, front / rear, left / right, and up / down are based on the directions as seen by the operator seated in the driver's seat 25. In the driver's cab, levers 26 are arranged on the left and right sides of the front of the driver's seat 25, which are operating bodies for the operator to operate the working device 12 (FIG. 5) located on the right side of the cab 15, levers 27 and pedals 28 for the operator to operate the travel of the lower traveling body 13 (FIG. 5) are arranged in front of the driver's seat 25, and a monitor and the like are arranged on the right front of the driver's seat 25.

[0019] The cab frame 24 has left and right front pillars (A pillars) 31, 31 arranged from the front to the upper part, and left and right rear pillars (C pillars) 32, 32 arranged from the rear to the upper part. A front header 34 is arranged between the upper parts of the front pillars 31, 31, and a front cross member 35 is arranged between the lower parts of the front pillars 31, 31. A rear header is arranged between the upper parts of the rear pillars 32, 32. In this embodiment, the front pillar 31 is a rectangular pipe material having a square cross section.

[0020] Furthermore, in this embodiment, a center pillar (B pillar) 38 is disposed across the upper part of the central portion in the front-rear direction of the cab frame 24. Although an example in which the center pillar 38 is disposed on both the left and right sides will be described, the center pillar 38 may be disposed only on the left side. Only the left center pillar 38 is shown in the drawing. In this embodiment, the center pillar 38 is a rectangular pipe material having a square cross section, and is formed to be thicker than the front pillar 31. Furthermore, a side header 40 is disposed across the front and rear between the upper parts of the front pillar 31 and the center pillar 38. The side header 40 may be formed integrally with the front pillar 31 or the rear pillar 32.

[0021] Further, each panel is disposed on the cab frame 24. In this embodiment, the cab frame 24 is provided with a floor surface portion 42, which is a lower panel supporting the driver's seat 25, at its lower portion, a ceiling surface portion 43, which is an upper panel, at its upper portion, a rear panel 44, which is disposed between the lower portions of the rear pillars 32, 32, and a side panel 45, which is disposed between the center pillar 38 and the rear pillar 32. In the illustrated example, a roof window 47, which is located on the upper front side of the driver's seat 25, is opened at a position near the front of the ceiling surface portion 43, a rear window 48, which is located behind the driver's seat 25, is opened at a position near the upper portion of the rear panel 44, and a rear side window 49, which is located to the side of the driver's seat 25, is opened at a position near the upper portion of the side panel 45. The roof window 47, the rear window 48, and the rear side window 49 are each covered by windshields 51, 52, and 53, which are transparent window covering members. In particular, the windshield 53 of the rear side window 49 is covered with a mesh-like guard member 54. Furthermore, in this embodiment, communication equipment 56 is disposed at a position toward the rear of the ceiling surface portion 43. A part of the communication equipment 56 is introduced inside the cab.

[0022] The cab frame 24 is formed with a front window 60, which is surrounded by the front pillars 31, 31, the front header 34, and the front cross member 35 and is located in front of the driver's seat 25, and an entrance / exit 61 for entering and exiting the driver's cab is formed on the left front side of the driver's seat 25 and is surrounded by the left front pillar 31, the left center pillar 38, and the left side header 40 on the opposite side from the working implement 12 (Figure 5), and a front side window is formed on the right front side of the driver's seat 25 and is surrounded by the right front pillar 31, the right center pillar, and the right side header 40.

[0023] The front window 60 is located in the front of the cab body 20 (cab frame 24). The entrance 61 is located in the cab body 20 (cab frame 24) on a surface adjacent to the surface on which the front window 60 is located, which is the left side surface in this embodiment. The front window 60 is covered by a front windshield 64 which is a window covering member, i.e., a windshield, and the entrance 61 is opened and closed by a door 65, and the front window portion is covered by a side windshield which is a window covering member. In this embodiment, a handrail 66 which is a gripping portion to be gripped when getting on and off the cab 15 is disposed on the inner edge of the entrance 61. The handrail 66 is located along the inner edge of the entrance 61. In the illustrated example, a plurality of handrails 66 are disposed vertically along the vertical direction on the rear side surface 31a of the left front pillar 31 which constitutes the inner edge of the entrance 61.

[0024] The front windshield 64 is made of a transparent member and is attached to the front of the front pillars 31, 31 with adhesive or attachment members such as bolts. In the example shown in the figure, the left and right front pillars 31, 31 forming the side surfaces of the cab frame 24 facing the front windshield 64, the front header 34, and the front cross member 35 are opposing members facing the front windshield 64.

[0025] The material of the front windshield 64 is preferably synthetic resin, particularly polycarbonate that is strong against impact, but is not limited thereto as long as it is a material that is highly transparent and not easily broken. The shape of the front windshield 64 is a shape that covers the entire front window 60, and is formed in a roughly rectangular shape that roughly matches the shape of the front of the driver's seat 25. In this embodiment, as shown in FIG. 1(b), the edge 64a of the front windshield 64 on the left side, that is, the entrance 61 side (door 65 side) protrudes leftward relative to the front pillar 31 on the left side of the cab frame 24. The protrusion amount W of the front windshield 64 from the front pillar 31 is a width that covers the door 65 with the entrance 61 closed when viewed from the front. That is, the front end of the door 65 with the entrance 61 closed is located opposite to the rear of the edge 64a of the front windshield 64, and the protrusion amount W is set to be roughly the same as or larger than the thickness of the door 65. Therefore, the door 65 is protected by the edge portion 64a of the front windshield 64.

[0026] As shown in Fig. 1(a), Fig. 2 and Fig. 3, the door 65 is rotatably attached to the cab frame 24 by a hinge 68 that rotates about an axis. That is, the door 65 can open and close the entrance 61 by rotating. In the illustrated example, the rear part of the door 65 is fixed to the left center pillar 38 by the hinge 68, and the front part can rotate left and right around the rear part. Therefore, in this embodiment, the rear part of the door 65 is the fixed side, and the side in front of the rear part is the movable side, and the center pillar 38 is the door mounting member to which the door 65 is attached. Also, the door 65 is set to open outward with respect to the driver's cab.

[0027] In this embodiment, the door 65 includes a door body 70 and a door frame 71 that is a reinforcing part that reinforces the door body 70. The door 65 is also provided with a locking mechanism that locks and fixes the door 65 to the cab frame 24 of the cab body 20 when the entrance 61 is closed.

[0028] The door body 70 is formed into a plate shape using a transparent member. The door body 70 is formed to a size sufficient to cover the entire entrance 61, and is formed into a shape corresponding to the shape of the entrance 61. In the illustrated example, the door body 70 is formed into a rectangular shape. A door frame 71 is attached to the rear side of the door body 70, i.e., the driver's cab side.

[0029] The door frame 71 is formed of an opaque material, such as metal. In this embodiment, the door frame 71 has a frame body 73 arranged along the outer edge of the door main body 70, and supports 74 arranged vertically and horizontally inside the frame body 73. In this embodiment, a handle 75 that an operator in the cab grips when opening and closing the door 65 is attached to the support body 74 of the door frame 71.

[0030] The frame 73 is formed in a rectangular frame shape according to the outer shape of the door body 70. In this embodiment, the frame 73 has a front frame portion 73a arranged in the up-down direction along the front edge of the door body 70 and an upper frame portion 73b arranged in the front-rear direction along the upper edge of the door body 70, which are opposed to the left front pillar 31 and the left side header 40 that form the edge of the entrance 61 of the cab frame 24.

[0031] The door 65 is attached to the cab body 20 so as to contact the side surface of the cab frame 24 where the entrance 61 is located, that is, the left side surface in this embodiment, and is disposed facing the side surface of the cab frame 24 when the entrance 61 is closed. In other words, the door 65 is disposed so as not to enter the inside, that is, the driver's cab side, of the imaginary plane including at least the left front pillar 31 and the outer side surface of the left side header 40 of the frame-structured cab frame 24 in the entire movable range. In this embodiment, at least the entire movable side of the door 65 is located outside the imaginary outer surface of the cab frame 24 in the entire movable range. In the illustrated example, the left front pillar 31 and the left side header 40, which form the side surface facing the door 65, of the cab frame 24, are door-facing members facing the door 65 when the entrance 61 is closed.

[0032] In the present embodiment, the door 65 is located outside the left side surface 31b, which is the door-facing surface of the front pillar 31 constituting the side surface of the cab frame 24, and the left side surface 40a, which is the door-facing surface of the side header 40. In addition, when the entrance 61 is closed, the end surfaces on the movable side of the door 65, that is, the front end surface, the upper end surface, and the lower end surface, are not located opposite the cab frame 24 in the surface direction. In the illustrated example, when the door 65 closes the entrance 61, the cab frame 24 (the front pillar 31 and the side header 40) is located only on the right side of the door 65, and the cab frame 24 is not located in front, above, or below. In other words, at least the front pillar 31 and the side header 40 of the cab frame 24 do not have a portion that protrudes outward from the surface of the door 65 on the driver's cab side, and at least the entire front pillar 31 and the side header 40 are located on the driver's cab side, i.e., inside, of the surface of the door 65 on the driver's cab side when the entrance 61 is closed.

[0033] In addition, the upper portion of the door 65 is located below and spaced apart from the ceiling surface portion 43 of the cab frame 24.

[0034] A seal member 80 is attached to one of the door 65 and the side surface of the cab frame 24. The seal member 80 is also called a weather strip, and is sandwiched between the door 65 and the side surface of the cab frame 24 when the entrance 61 is closed. In other words, the seal member 80 maintains airtightness around the entire periphery of the contact surface between the door 65 and the cab frame 24, and prevents rain and the like from entering the cab. In this embodiment, the seal member 80 is attached to the cab or cab frame 24 side of the door 65, the door frame 71 or the frame body 73 in the illustrated example, but is not limited thereto and may be attached to the side surface of the cab frame 24. The seal member 80 is formed of an elastic body such as rubber.

[0035] Preferably, a eaves 82 is formed above the door 65. The eaves 82 is a rain shield that prevents raindrops from entering from above, and is formed to protrude laterally from the left side of the ceiling surface portion 43 of the cab body 20. The thickness of the eaves 82 is set to be approximately the same as or larger than the thickness of the door 65 when the entrance 61 is in a closed position.

[0036] Next, the effects of the illustrated embodiment will be described.

[0037] The door 65 of the cab 15 is attached to the cab body 20 so as to contact the side of the cab frame 24, and is configured so that the door 65 faces the side of the cab frame 24 when the entrance 61 is closed. Therefore, even if the cab frame 24 or the door 65 is deformed due to contact with wood during work, the door 65 is unlikely to get stuck and become unable to open. In other words, even if wood or the like contacts the cab 15 and the cab frame 24 of the cab body 20 is deformed, the door 65 is unlikely to get deformed together with the cab frame 24 and become unable to open because the door 65 is located outside the cab frame 24, and the contact surface between the door 65 and the cab frame 24 is simply shifted. Also, even if wood or the like contacts the door 65 and the door 65 is deformed, the door 65 is unlikely to get stuck inside the cab frame 24 and become unable to open because the door 65 is located outside the cab frame 24.

[0038] Therefore, even if the cab frame 24 or the door 65 is deformed, opening and closing of the door 65 is not easily hindered.

[0039] Furthermore, for example, in the case of a conventional door that is fitted into a recess formed in a cab frame made of a special steel pipe, a blind spot is created in the fore-and-aft width of the combined front pillar on the left side of the cab frame and the front frame portion of the door frame located behind the front pillar, as seen by the operator seated in the driver's seat. In contrast, in this embodiment, the cab frame 24 and the front frame portion 73a of the door frame 71 of the door 65 overlap in the left-right direction, as shown in Figure 1(a), so that the width (angle θ) of the blind spot in the fore-and-aft direction from the viewpoint E of the operator seated in the driver's seat 25 is narrowed, and visibility from the driver's seat 25 is also improved.

[0040] In addition, since the edge 64a on the entrance / exit 61 side of the front windshield 64 attached to the cab body 20 and covering the front window 60 protrudes from the cab frame 24 and faces the front end of the door 65, the edge 64a of the front windshield 64 protects the door 65 from contact with wood or the like from the front and sides, and even if wood or the like collides with the door 65 from the front or side, deformation of the door 65 can be suppressed, and the door 65 is unlikely to be deformed to the point where it cannot be opened, and opening and closing of the door 65 is unlikely to be hindered. In particular, since the protrusion amount W of the front windshield 64 from the cab frame 24 is set to a width that covers the door 65 in a front view, the door 65 can be more reliably protected from contact with wood or the like from the front or side.

[0041] Furthermore, even if the handrail 66 is positioned to protrude toward the left side surface 31b of the left front pillar 31, if the edge 64a of the front windshield 64 on the entrance / exit 61 side is set to a width sufficient to hide the handrail 66, it is possible to prevent the handrail 66 from colliding with wood or the like and deforming in such a way as to pinch the door 65.

[0042] Furthermore, since the sealing member 80 is provided to be sandwiched between the door 65 and the side surface of the cab frame 24 when the entrance 61 is closed, the sealing member 80 can maintain the airtightness of the operator's cab.

[0043] Furthermore, by providing a eaves 82 on the cab body 20 above the door 65, the eaves 82 can prevent rain from entering the operator's compartment inside the cab body 20.

[0044] In the above embodiment, the door 65 is disposed on the left side of the cab body 20 (cab frame 24), but the present invention is not limited thereto and may be disposed on the rear side of the cab body 20 (cab frame 24). In this case, the rear edge of the side windshield, which is a windshield covering a window formed on the left side of the cab body 20, is configured to protrude beyond the rear of the rear pillar 32, thereby allowing the door 65 to function in the same manner as the above embodiment. [Industrial Applicability]

[0045] The present invention has industrial applicability to businesses involved in the manufacturing, sales, and other industries of forestry work machines. [Explanation of symbols]

[0046] 15 Cab 20 Cab body 24 Cab frame 60. Window 61 Entrance / Exit 64 Windshield, a window covering material 64a Edge 65 Doors 80 Sealing material 82 Eaves

Claims

1. A cab body having a cab frame, an entrance formed in the cab frame, and a window formed in the cab frame on a surface adjacent to the entrance; A door that opens and closes the entrance and exit of the cab body, a window covering member attached to the cab body to cover the window, the edge portion of the window covering member protruding from the cab frame and facing the end portion of the door; The door is attached to the cab body so that it faces the side of the cab frame when the entrance is closed and the cab frame does not face the front, upper and lower sides of the movable side. A cab characterized by:

2. The door is provided with a seal member that is sandwiched between the door and the side of the cab frame when the door is closed. The cab according to claim 1 .

3. Equipped with a visor located on the cab body above the door 3. The cab according to claim 1 or 2.

Images