Cab and work vehicle equipped with a cab

Abstract

To enable the cab guard to be opened and closed without the use of tools on cabs and work vehicles equipped with cabs. [Solution] A cab and a work vehicle equipped with a cab include: a cab rear glass provided on the rear of the cab body; a cab guard covering the cab rear glass from the outside; a connecting mechanism connecting the cab body and the cab guard in both a closed state where the cab guard covers the cab rear glass and an open state where the cab guard is separated from the cab rear glass; and a locking mechanism located between the cab rear glass and the cab guard and disposed on the left and right outer side of the cab body, which locks the connecting mechanism in the closed state and releases the lock to open the cab guard.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a cab and a work vehicle equipped with the cab. BACKGROUND ART

[0002] Patent Document 1 discloses a foldable safety barrier for protecting the rear window of a pickup truck and an occupant in the cab from cargo carried on a cargo bed when the cargo moves. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0003] PATENT DOCUMENT 1 U.S. Patent No. 7475928 Specification SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0004] By the way, in work vehicles such as construction machines including hydraulic excavators, agricultural machines including tractors, and other industrial machines, a cab guard provided on the back surface of the cab is fixed with bolts, so a tool is required to open and close the cab guard, and there is room for improvement in terms of ease of opening and closing.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to obtain a cab capable of opening and closing a cab guard without using a tool, and a work vehicle equipped with the cab. MEANS FOR SOLVING THE PROBLEMS

[0006] A cab according to the first embodiment comprises: a rear cab glass provided on the rear of the cab body; a cab guard covering the rear cab glass from the outside; a connecting mechanism connecting the cab body and the cab guard in both a closed state where the cab guard covers the rear cab glass and an open state where the cab guard is separated from the rear cab glass; and a locking mechanism located between the rear cab glass and the cab guard, and disposed on the left and right outer side of the cab body, which locks the cab guard in the closed state and releases the lock to bring the cab guard to the open state.

[0007] The work vehicle according to the second embodiment is equipped with the cab according to the first embodiment. [Effects of the Invention]

[0008] According to this disclosure, the cab guard can be opened and closed without using tools in a cab and a work vehicle equipped with a cab. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic side view showing an example of a work vehicle according to one embodiment of the present disclosure. [Figure 2] Figure 1 is a perspective view of the cab mounted on the work vehicle, seen from the front left. [Figure 3] Figure 1 is a perspective view of the cab mounted on the work vehicle, seen from the right rear. [Figure 4] This is a perspective view of the dorsal component of the skeletal structure, seen from the left rear. [Figure 5] This is a rear view of the cab, seen from the back. [Figure 6] This is a schematic left side view showing the cab with the cab guard in the closed position. [Figure 7] This is a schematic left side view showing a cab with the cab guard in the open position. [Figure 8] This is a perspective view of the cab guard from the upper right. [Figure 9]This is a perspective view of the main parts, including the sliding parts, from the upper right. [Figure 10] This is a perspective view of the main components, including the operating parts, from the right rear. [Figure 11] This is an explanatory diagram illustrating the structure of the locking mechanism. [Modes for carrying out the invention]

[0010] A work vehicle 10 to which a cab 20 according to one embodiment of this disclosure is applied will be described below with reference to the drawings. In this specification and the drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant explanations will be omitted. Also, in each figure, arrow FR indicates the front side in the longitudinal direction of the vehicle, arrow UP indicates the upper side in the vertical direction of the vehicle, and arrow LH indicates the left side in the vehicle width direction. In the following description, when the longitudinal, vertical, and left-right directions are used unless otherwise specified, they refer to the longitudinal direction of the vehicle, the vertical direction of the vehicle, and the left-right direction in the vehicle width direction, respectively.

[0011] <Work Vehicle 10> Figure 1 is a schematic side view showing an example of a work vehicle according to one embodiment of the present disclosure. As shown in Figure 1, the work vehicle 10 according to this embodiment includes, for example, a front vehicle section 11 including a cab 20, a rear vehicle section 12 including a dump body 30, and a flexible connecting section 13 that flexibly connects the front vehicle section 11 and the rear vehicle section 12.

[0012] The front vehicle section 11 comprises a cab 20, a lateral platform 22 located to the side of the cab 20, and left and right front wheels 24 located below the cab 20. The cab 20 has a driver's cab 27 inside which a driver's seat (not shown) is located, and is constructed as a box-shaped structure. The cab 20 will be described in detail later.

[0013] The side platforms 22 are provided on the right side and the left side of the cab 20, respectively. The side platform 22 is equipped with a handrail 23 provided on the platform 22. The handrail 23 is provided at appropriate positions that are on the outer side in the vehicle width direction, the front side, and the rear side relative to the worker on the side platform 22.

[0014] The rear vehicle section 12 includes a dump body 30, and left and right rear wheels 32, 33 located below the dump body 30. The rear wheels 32, 33 include a first rear wheel 32 and a second rear wheel 33 located further rearward than the first rear wheel 32.

[0015] The dump body 30 is tiltably supported with respect to the frame 14 of the articulated coupling section 13. The dump body 30 is formed in a box shape with an open top. The dump body 30 is provided with a tailgate 34. The tailgate 34 is provided to be able to open and close the rear end portion of the dump body 30, and has the role of controlling the retention and discharge of loaded materials. The tailgate 34 prevents the loaded materials in the dump body 30 from falling when the work vehicle 10 is traveling, and is opened to smoothly discharge the loaded materials when the dump body 30 is tilted.

[0016] <cab 20> Figure 2 is a perspective view of the cab 20 mounted on the work vehicle 10 of Figure 1 as viewed from the diagonally left front, and Figure 3 is a perspective view of the cab 20 mounted on the work vehicle 10 of Figure 1 as viewed from the diagonally right rear. Note that illustration of a cab guard 60 described later is omitted in Figure 3. As shown in Figure 2 and Figure 3, the cab 20 includes a cab main body portion 40 that constitutes its outer shell, and a skeleton body 50 that forms the framework of the cab main body portion 40.

[0017] As shown in Figure 2 and Figure 3, the cab main body 40 is formed in a box shape having a front surface 42, a rear surface 43, a left side surface 44, a right side surface 45, a floor surface 46, and a ceiling surface 47. Each surface of the cab main body 40 is supported by a frame body 50. As an example, the frame body 50 is integrally formed by welding each frame member at the joining position. The cab 20 constitutes the operator's cab 27 (see Figure 1) as each surface, that is, the front surface 42, the rear surface 43, the left side surface 44, the right side surface 45, the floor surface 46, and the ceiling surface 47, is supported by the frame body 50.

[0018] As shown in Figure 2 and Figure 3, the front surface 42 is provided with a front panel 42A on the lower side. Further, the front surface 42 is provided, above the front panel 42A, with a front windshield 42CF that is disposed obliquely so as to be positioned on the front side as it goes downward. A left side window glass 44CS and a right side window glass 45CS, which will be described later, are joined to the left and right end portions of the front windshield 42CF, respectively. Since the front windshield 42CF on the front side and the left side window glass 44CS and the right side window glass 45CS on both left and right sides are joined at the front left and right end portions of the cab 20, the front left and right end portions of the cab 20 are a visible area from which the outside can be visually recognized from the inside of the cab 20.

[0019] As shown in Figure 2, the left side surface 44 is provided with a door portion 44A. The door portion 44A includes a door frame 44AF, and a door panel 44AD that can be opened and closed around the rear end portion side of the door frame 44AF as an axis. The door panel 44AD is provided with a handle 44AT. The door panel 44AD is provided with three window portions 44AG at the upper part.

[0020] Further, the left side surface 44 is provided with a left side panel 44B on the lower side. Further, the left side surface 44 is provided, above the left side panel 44B, with a left side window glass 44CS joined rearward from the left end portion of the front windshield 42CF, and a rear left side window glass 44G extending forward from the left end portion of a left rear window glass 43GL which will be described later. The left side window glass 44CS is formed in a triangular shape with the end portion on the front windshield 42CF side as the oblique side. The rear left side window glass 44G has a rectangular shape.

[0021] As shown in Figure 3, the right side 45 has a right side panel 45B on its lower side. The right side 45 also has a right side glass 45CS above the right side panel 45B, which is joined to the rear from the right end of the front glass 42CF. The right side glass 45CS is formed in a triangular shape with the end on the front glass 42CF side as the hypotenuse.

[0022] Furthermore, the right side 45 is located above the right side panel 45B and behind the right side glass 45CS, and includes two front right side glass panels 45GF and a rear right side glass panel 45G, arranged in the front-to-back direction. The two front right side glass panels 45GF are each vertically elongated rectangles. The rear right side glass panel 45G is rectangular and extends forward from the right end of the right rear glass panel 43GR, which will be described later.

[0023] As shown in Figure 3, the rear panel 43 comprises a left rear panel 43A, a right rear panel 43B, and a central rear panel 43C. The left rear panel 43A and the right rear panel 43B are formed in a substantially rectangular shape and are joined to the rear ends of the left side panel 44B and the right side panel 45B, respectively. In this embodiment, the upper end of the left rear panel 43A has a slope that becomes lower towards the left end. The central rear panel 43C is formed in an elongated shape that is longer in the vertical direction and extends between the floor surface 46 and the ceiling surface 47.

[0024] Figure 4 is a perspective view of the rear member 57 of the skeletal structure 50, viewed from the left rear. Figure 4 also shows the rear floor beam member 52B that supports the floor surface 46 and the rear ceiling beam member 53B that supports the ceiling surface 47.

[0025] The skeletal structure 50 includes a rear member 57 that supports the rear surface 43. As shown in Figure 4, the rear member 57 comprises a pair of rear column members 57A as a rear beam member, an upper auxiliary beam member 57B, and a lower auxiliary beam member 57C.

[0026] The rear column member 57A is located on the rear surface 43 behind the driver's seat (not shown) and corresponds to the center C-pillar of the cab 20. The rear column member 57A connects the floor rear beam member 52B and the ceiling rear beam member 53B in the vertical direction. As an example, the rear column member 57A includes a left rear column member 57AL located to the left of the center of the rear surface 43, and a right rear column member 57AR located to the right of the center of the rear surface 43, spaced apart from the left rear column member 57AL.

[0027] In this embodiment, as shown in Figure 3, the lower end of the left rear panel 43A is fixed to the rear floor beam member 52B from the rear side, and the right end is fixed to the left rear column member 57AL from the rear side. The lower end of the right rear panel 43B is fixed to the rear floor beam member 52B from the rear side, and the left end is fixed to the right rear column member 57AR from the rear side.

[0028] The central rear panel 43C covers the area enclosed by the rear ceiling beam member 53B, the rear floor beam member 52B, and the pair of rear column members 57A. The central rear panel 43C is fixed to the rear ceiling beam member 53B, the rear floor beam member 52B, and the pair of rear column members 57A from the rear side.

[0029] Furthermore, as shown in Figure 3, the rear panel 43 has the left rear glass 43GL and the right rear glass 43GR attached to the upper sides of the left rear panel 43A and the right rear panel 43B, respectively. The left rear glass 43GL and the right rear glass 43GR are examples of rear glass 43G. Note that the left rear panel 43A and the right rear panel 43B have sufficient strength to support the left rear glass 43GL and the right rear glass 43GR, respectively.

[0030] The left rear glass 43GL is formed in a roughly rectangular shape and extends to the right in the left-right direction from the rear end of the rear left side glass 44G (see Figure 2) described above. The right rear glass 43GR is formed in a roughly rectangular shape and extends to the left in the left-right direction from the rear end of the rear right side glass 45G described above. In this way, the rear left side glass 44G and the left rear glass 43GL, and the rear right side glass 45G and the right rear glass 43GR are joined at the left and right rear ends of the cab 20, so the left and right rear ends of the cab 20 are visible areas from which the outside can be seen from inside the cab 20.

[0031] <Cab Guard 60> Next, the cab guard 60 attached to the rear 43 of the cab 20 will be described. Figure 5 is a rear view of the cab 20 as seen from the rear. As shown in Figure 5, the cab 20 is equipped with a cab guard 60 that is attached to cover the rear glass 43G of the rear 43. The cab guard 60 is a component that protects the rear glass 43G from breaking when loading sand, soil, etc. onto the dump body 30 as described above.

[0032] In this embodiment, as an example, the cab 20 is equipped with two cab guards 60: a left cab guard 60L and a right cab guard 60R. Specifically, the left cab guard 60L is attached to the rear ceiling beam member 53B and the left rear panel 43A at its upper end, so as to cover the left rear glass 43GL. The right cab guard 60R is attached to the rear ceiling beam member 53B and the right rear panel 43B at its upper end, so as to cover the right rear glass GR. In other words, the left and right cab guards 60 (left cab guard 60L and right cab guard 60R) are provided on the left and right sides of a pair of rear column members 57A, i.e., the central rear panel 43C. In other words, the rear column member 57A is located between the two cab guards 60 in the left-right direction.

[0033] The left cab guard 60L and the right cab guard 60R are, for example, formed in a roughly rectangular shape from a mesh-like metal member, and cover the left rear glass 43GL and the right rear glass GR, respectively, from the outside of the cab body 40. Specifically, the left cab guard 60L and the right cab guard 60R include, for example, a roughly rectangular frame 60A and a mesh 60B disposed inside the frame 60A. The frame 60A is formed in a shape that follows the outer edge of the left rear glass 43GL or the right rear glass GR.

[0034] In this embodiment, as shown in Figures 3 and 5, the left rear glass 43GL has a larger area than the right rear glass 43GR when viewed from the rear. Therefore, in accordance with the areas of the left rear glass 43GL and the right rear glass 43GR, the area of ​​the left cab guard 60L is larger than the area of ​​the right cab guard 60R when viewed from the rear. In other words, the left cab guard 60L and the right cab guard 60R have different shapes.

[0035] Figure 6 is a schematic left side view of the cab 20 with the cab guard 60 closed, and Figure 7 is a schematic left side view of the cab 20 with the cab guard 60 open. As shown in Figure 6, the cab guards 60 (left cab guard 60L, right cab guard 60R) are arranged with a gap G in the front-rear direction relative to the rear glass 43G (left rear glass 43GL, right rear glass 43GR).

[0036] Furthermore, as shown in Figures 6 and 7, the cab guards 60 (left cab guard 60L, right cab guard 60R) are equipped with a connecting mechanism 70. The connecting mechanism 70 connects the cab body 40 and the cab guards 60 in both the closed state (see Figure 6) where the cab guards 60 (left cab guard 60L, right cab guard 60R) cover the rear glass 43G (left rear glass 43GL, right rear glass 43GR), and the open state (see Figure 7) where the cab guards 60 (left cab guard 60L, right cab guard 60R) are separated from the rear glass 43G. In this embodiment, as shown in Figure 7, the cab guards 60 are opened upward by the connecting mechanism 70 when in the open state.

[0037] Next, the connection mechanism 70 will be described. In the following, the left cab guard 60L and the right cab guard 60R will be described together as the cab guard 60, and when different configurations are described, they will be described separately as the left cab guard 60L and the right cab guard 60. Figure 8 is a perspective view of the cab guard 60 from the upper right.

[0038] As shown in Figures 5 and 8, the connecting mechanism 70 includes a hinge portion 72 and a sliding portion 74. Two hinge portions 72 are arranged on the lower end of the cab guard 60, spaced apart from each other. As shown in Figure 8, one piece of the hinge portion 72 is fixed to the upper end of the left rear panel 43A or the right rear panel 43B, and the other piece is fixed to the lower end of the cab guard 60. The hinge portion 72 is configured to rotate about an axis in the left-right direction, allowing the cab guard 60 to rotate relative to the left rear panel 43A or the right rear panel 43B. In other words, the cab guard 60 is rotatable at its upper end with its lower end as the axis.

[0039] As shown in Figure 8, the sliding portion 74 is located below the vertical center of the cab guard 60, and is provided at the right end of the left cab guard 60 and the left end of the right cab guard 60, respectively. Figure 9 is a perspective view of the main part including the sliding portion 74, viewed from the upper right. As shown in Figures 8 and 9, the sliding portion 74 comprises a fixing portion 74A fixed to the back surface 43, a sliding portion 74B fixed to the cab guard 60, and a sliding member 74C.

[0040] As shown in Figure 9, the fixing part 74A is fixed to the central rear panel 43C, and more specifically to the rear column member 57A. One end 74C1 of the sliding member 74C is fixed to the inside of the fixing part 74A in the left-right direction so as to be rotatable about the left-right axis.

[0041] The sliding member 74C is composed of a long plate member, and as described above, one end 74C1 is rotatably fixed to the fixing part 74A. The sliding member 74C also has a cylindrical portion 74C3 projecting outward in the left-right direction from the other end 74C2. The cylindrical portion 74C3 has a fastener 74C4 at its tip that is larger than the outer diameter of the cylindrical portion 74C3.

[0042] The sliding portion 74B includes a plate portion 74B1 formed from a substantially rectangular plate material, and a part of the plate portion 74B1 is fixed to the left and right outer side of the frame 60A of the cab guard 60, with the plate thickness direction being the left and right direction. The plate portion 74B1 has an elongated opening 74B2 along the frame 60A, and a circular hole 74B3 having a diameter larger than the width of the opening 74B2 is provided at the upper end when the cab guard 60 is in the closed state.

[0043] The cylindrical portion 74C3 of the sliding member 74C is configured to slide relative to the inner surface of the opening 74B2 of the sliding portion 74B along its longitudinal direction. Specifically, as shown in Figure 6, when the cab guard 60 is in the closed state, the cylindrical portion 74C3 is positioned in the circular hole 74B3. The cab guard 60 is rotated from the closed state, with its lower end pivoting on the left-right axis of the hinge portion 72. At this time, the cylindrical portion 74C3 moves relative to the opening 74B2 from the circular hole 74B3 and slides within the opening 74B2 toward the opposite side from the circular hole 74B3. Then, as shown in Figure 7, the cab guard 60 is in the open state, separated from the rear glass 43G.

[0044] As shown in Figure 8, the cab guard 60 is in its most open state when the cylindrical portion 74C3 is located at the lower end of the opening 74B2, that is, at the end opposite to the circular hole 74B3. In this embodiment, as an example, the cab guard 60 is configured to maintain an inclination with respect to the rear glass 43G at an angle of, for example, 30 degrees to 60 degrees, as shown in Figure 7, when in the open state. In this way, the sliding portion 74 limits the upward opening angle of the cab guard 60 when in the open state. The sliding portion 74 in this embodiment is an example of a limiting portion.

[0045] Furthermore, the cab guards 60 (left cab guard 60L, right cab guard 60R) are equipped with a locking mechanism 80 that locks the cab guards 60 in a closed state (see Figure 6) covering the rear glass 43G (left rear glass 43GL, right rear glass 43GR), and opens the cab guards 60 by releasing the lock. Figure 10 is a perspective view of the main parts including the locking mechanism 80, seen from the right rear, and Figure 11 is an explanatory diagram illustrating the structure of the locking mechanism 80.

[0046] As shown in Figures 10 and 11, the locking mechanism 80 includes a locking portion 82 fixed to the rear surface 43 of the cab body 40 and a locking portion 84 fixed to the cab guard 60. The locking portion 84 includes a main body 84A fixed to the cab guard 60, a fixing portion 84B capable of maintaining the state in which the locking portion 82 is fixed to the main body 84A, and an operating portion 84C capable of releasing the state in which the locking portion 82 is fixed to the main body 84A.

[0047] The fixing part 84B catches and holds the locking part 82 as it approaches as the cab guard 60 closes to cover the rear glass 43G. As a result, the locking part 82 is fixed to the main body part 84A, and the cab guard 60 is locked in the closed position.

[0048] In contrast, when the operating part 84C is rotated to one side in the left-right direction, the fixing part 84B stops holding the locked part 82. As a result, the locked part 82 is no longer fixed to the main body part 84A, and the cab guard 60 separates from the rear glass 43G and opens. The fixing part 84B is, for example, a pair of opposing claw members. In this case, the pair of claw members catch the locked part 82 when it enters between the pair of claw members, and hold it in that position, thereby maintaining the state in which the locked part 82 is fixed to the main body part 84A.

[0049] Furthermore, when the operating section 84C is rotated to one side, the pair of claw members stop holding the locking portion 82 and push out the locking portion 82. This releases the locking portion 82 from being fixed to the main body 84A, and the locking portion 82 springs out forcefully. As a result, the cab guard 60 smoothly separates from the cab body 40.

[0050] In this embodiment, as shown in Figure 10, the operating section 84C is provided between the rear glass 43G and the cab guard 60. Furthermore, the operating section 84C is provided on the left and right outer sides of the rear 43. That is, the operating section 84C is provided in a position that allows it to be operated from the side of the cab body 40.

[0051] <Effects and Effects> Next, the effects and advantages of this embodiment will be described.

[0052] The cab 20 according to this embodiment includes a cab guard 60 that covers the rear glass 43G from the outside, and a connecting mechanism 70 that connects the cab body 40 and the cab guard 60 in both a closed state where the cab guard 60 covers the rear glass 43G and an open state where the cab guard 60 is separated from the rear glass 43G. The cab 20 also includes a locking mechanism 80 that is located between the rear glass 43G and the cab guard 60 and is disposed on the outside of the cab body 40 in the left-right direction, locking the cab guard 60 in the closed state and opening the cab guard 60 by releasing the lock.

[0053] Specifically, as shown in Figures 10 and 11, when the operating part 84C of the locking mechanism 80 is rotated by the operator to one side, the fixing part 84B stops holding the locked part 82. As a result, the locked part 82 is no longer fixed to the main body part 84A, the lock on the cab guard 60 is released, and the cab guard 60 separates from the rear glass 43G and opens.

[0054] On the other hand, when the cab guard 60 is pushed up by the operator, the cylindrical portion 74C3 slides toward the circular hole 74B3, and the cylindrical portion 74C3 moves relative to the circular hole 74B3. Then, as shown in Figure 6, the cab guard 60 moves to cover the rear glass 43G. As the cab guard 60 moves in the closing direction, as shown in Figures 10 and 11, the fixing portion 84B catches and holds the locking portion 82 that approaches as the cab guard 60 becomes closed and covers the rear glass 43G. As a result, the locking portion 82 is fixed to the main body portion 84A, and the cab guard 60 is locked in the closed position.

[0055] Thus, in the cab 20 according to this embodiment, the cab guard 60 can be opened and closed without using tools by operating the operating part 84C of the locking mechanism 80 from the outside of the cab body 40. In particular, steps such as a lateral platform 22 are often provided on the side of the cab body 40. In this case, the operator can operate the operating part 84C of the locking mechanism 80 at this step.

[0056] Furthermore, in the cab 20 according to this embodiment, the cab guard 60 is opened upward by the connecting mechanism 70 when it is in the open state, so the cab guard 60 can be opened from the closed state to the open state by its own weight. As a result, compared to the case where it opens downward, less force is required to open the cab guard 60, so the cab guard 60 can be opened easily.

[0057] Furthermore, the cab 20 according to this embodiment is equipped with a sliding part 74 that acts as a limiting part to restrict the upward opening angle of the cab guard 60. Therefore, when the lock on the cab guard 60 by the locking mechanism 80 is released, the cab guard 60 can be kept open at a predetermined upward opening angle.

[0058] Furthermore, in the cab 20 according to this embodiment, two cab guards 60 are provided: a left cab guard 60L that covers the left rear glass 43GL of the rear glass 43G, and a right cab guard 60R that covers the right rear glass 43GR. Therefore, compared to the case where the entire rear glass 43GR is covered by a single cab guard, the size of the cab guard 60 can be reduced, thereby improving the operability of the opening and closing operation.

[0059] Furthermore, as in this embodiment, if a rear column member 57A is provided on the rear 43 behind the driver's seat, cab guards 60 can be provided on both the left and right sides of this rear column member 57A. Therefore, the left cab guard 60L and the right cab guard 60R can be formed to match the shapes of the left rear window 43GL and the right rear window 43GR, respectively, thus reducing the cost required for the cab guards that cover the rear column member 57A.

[0060] Furthermore, in the cab 20 according to this embodiment, since the two cab guards 60 can be opened and closed independently, one of the cab guards 60 can be opened when it is necessary to clean either the left rear glass 43GL or the right rear glass 43GR, resulting in improved operability.

[0061] Furthermore, a work vehicle 10 equipped with the cab 20 according to this embodiment can obtain the effects of the cab 20 described above.

[0062] 〔supplementary explanation〕 In the above embodiment, the work vehicle 10 includes a dump body 30 in its rear vehicle section 12, but this disclosure is not limited thereto. For example, the rear vehicle section 12 does not have to include a dump body 30. In other words, the work vehicle 10 may be a work vehicle other than an articulated dump truck.

[0063] Furthermore, in the above embodiment, a pair of left and right rear column members 57A, namely the left rear column member 57AL and the right rear column member 57AR, are used as the third column member, but the disclosure is not limited thereto. A single rear column member 57A may be used as long as it can maintain sufficient strength to protect the operator in the event that the cab 20 falls or tips over.

[0064] Furthermore, although the two cab guards 60 are made independently openable and closable in the above embodiment, the disclosure is not limited thereto. For example, the operating parts 84C of the two locking mechanisms 80 may be linked by a single operating part.

[0065] Furthermore, although the above embodiment includes two cab guards 60, the disclosure is not limited thereto, and a single cab guard 60 may be used to cover both the left rear glass 43GL and the right rear glass 43GR.

[0066] Furthermore, in the above embodiment, the rear column member 57A is positioned approximately in the center of the rear surface 43, but for example, a pair of rear column members may be provided on both the left and right sides. In this case, the rear glass 43G may be covered by one cab guard 60, or the rear glass 43G may be covered by two cab guards 60, one on the left and one on the right.

[0067] Furthermore, in the above embodiment, a sliding part 74, i.e., a slide mechanism, is used as the limiting part of the connection mechanism 70, but this disclosure is not limited thereto. For example, a chain or the like may be used as the limiting part. However, a slide mechanism is more preferable from the viewpoint of noise and other factors.

[0068] Furthermore, in the above embodiment, the locking mechanism 80 is provided with a fixing part 84B that can maintain the state in which the locked portion 82 is fixed to the main body portion 84A, and an operating part 84C that can release the state in which the locked portion 82 is fixed to the main body portion 84A. However, the disclosure is not limited to this. For example, a hook shape may be used, or a known locking mechanism may be used.

[0069] Although one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above, and it is of course possible to implement it in various other forms without departing from its spirit.

[0070] [Note] <First aspect> The rear window of the cab, located on the back of the cab body, A cab guard that covers the rear glass of the cab from the outside, A connecting mechanism that connects the cab body and the cab guard in both a closed state where the cab guard covers the rear glass of the cab and an open state where the cab guard is separated from the rear glass of the cab, A locking mechanism is provided between the rear glass of the cab and the cab guard, and located on the left-right outer side of the cab body, which locks the cab guard in the closed position and releases the lock to return the cab guard to the open position. A cab equipped with this feature. <Second aspect> In the cab configuration of the first embodiment, The cab guard is opened upward when in the open state by the connection mechanism. <Third aspect> In the cab configuration of the second embodiment, The aforementioned connection mechanism is The lower end of the cab guard is connected to the cab body, and the upper end of the cab guard is made rotatable about the left-right axis of the lower end of the cab guard, A limiting portion is provided, with one end fixed to one of the cab guard and the cab body, and the other end fixed to the other of the cab guard and the cab body, to limit the upward opening angle of the cab guard when it is in the open state. It is equipped with. <Fourth aspect> In a cab with any of the configurations of the first to third embodiments, Equipped with two of the aforementioned cab guards, The two cab guards are arranged side by side in the left-to-right direction. <Fifth aspect> In the cab configuration of the fourth embodiment, The two cab guards can be opened and closed independently of each other. <Sixth aspect> In a cab with a configuration according to the fourth or fifth embodiment, The cab body is equipped with a rear column member located on the rear side, The rear column member is positioned between the two cab guards in the left-right direction. <Seventh aspect> In a cab with any of the configurations of the 4th to 6th aspects, The left and right cab guards have different shapes. <Eighth aspect> A work vehicle equipped with a cab configured in any of the first to seventh embodiments. [Explanation of Symbols]

[0071] 10 Work vehicle, 20 Cab, 26 Driver's seat, 40 Cab body, 43 Rear view, 43G Rear glass (cab rear glass), 43GL Left rear glass (cab rear glass), 43GR Right rear glass (cab rear glass), 50 Skeleton (skeleton), 57A Rear column member, 57AL Left rear column member (rear column member), 57AR Left rear column member (rear column member), 60 Cab guard, 60L Left cab guard (cab guard), 60R Right cab guard (cab guard), 70 Connection mechanism, 72 Hinge part, 74 Sliding part (restricting part), 80 Locking mechanism

Claims

1. The rear window of the cab, located on the back of the cab body, A cab guard that covers the rear glass of the cab from the outside, A connecting mechanism that connects the cab body and the cab guard in both a closed state where the cab guard covers the rear glass of the cab and an open state where the cab guard is separated from the rear glass of the cab, A locking mechanism is provided between the rear glass of the cab and the cab guard, and located on the left-right outer side of the cab body, which locks the cab guard in the closed position and releases the lock to return the cab guard to the open position. A cab equipped with this feature.

2. The cab guard is opened upward when in the open state by the connection mechanism, according to claim 1.

3. The aforementioned connection mechanism is The lower end of the cab guard is connected to the cab body, and the upper end of the cab guard is made rotatable about the left-right axis of the lower end of the cab guard, A limiting portion is provided, with one end fixed to one of the cab guard and the cab body, and the other end fixed to the other of the cab guard and the cab body, to limit the upward opening angle of the cab guard when it is in the open state. The carburetor according to claim 2, comprising:

4. Equipped with two of the aforementioned cab guards, The cab according to claim 1, wherein the two cab guards are arranged in the left-right direction.

5. The cab according to claim 4, wherein the two cab guards are each opened and closed independently.

6. The cab body is equipped with a rear column member located on the rear side, The cab according to claim 4, wherein the rear column member is located between the two cab guards in the left-right direction.

7. The cab according to claim 6, wherein the left and right cab guards have different shapes.

8. A work vehicle equipped with a cab as described in any one of claims 1 to 7.

Images