Work equipment

Abstract

To consider that an operation support mechanism that supports an operation member does not protrude below an armrest provided on a control platform.SOLUTION: A work machine comprises a machine body, a driver's seat mounted on the machine body, a control platform provided in front of the driver's seat, a swingable operation member arranged on the control platform, an operation support mechanism for supporting the operation member. The control platform includes a hollow armrest extending rearward from the control platform side. The operation support mechanism has a neutral return mechanism that returns the operation member from an operated operation position to the neutral position, and a swing regulation mechanism that regulates the amount of operation of the operation member from the neutral position, and is housed within a hollow interior of the armrest.SELECTED DRAWING: Figure 21

Description

[Technical field]

[0001] The present invention relates to a work machine such as a backhoe. [Background technology]

[0002] 2. Description of the Related Art A working machine disclosed in Patent Document 1 is known in the art. The work machine disclosed in Patent Document 1 has a control platform in front of a driver's seat mounted on the machine body. The control platform is provided with a control member that is gripped and operated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP2007-126898A Summary of the Invention [Problem to be solved by the invention]

[0004] However, if a driver operates the control member for a long time with his / her arms stretched out in front, he / she will get tired. In this case, it is considered to provide an armrest that extends from the control stand to the driver's seat side on the control stand. In the case where an operation member different from the control member is provided on the side of the armrest on the control stand equipped with the armrest, if an operation support mechanism for supporting the operation member is provided below the armrest, there is a problem that the knees or thighs of the driver will hit the operation support mechanism.

[0005] In view of the above-mentioned problems, an object of the present invention is to prevent an operation support mechanism that supports an operating member from protruding below an armrest provided on a pilot's console. [Means for solving the problem]

[0006] A working machine according to one aspect of the present invention includes a machine body, a driver's seat mounted on the machine body, a control stand provided in front of the driver's seat, an operating member arranged on the control stand that can be swung, and an operation support mechanism that supports the operating member. An angle sensor for detecting an operation direction and an operation amount of the operation member; The control console comprises: A base is provided upright on the aircraft body, a hollow mounting portion is attached to the base, and the mounting portion is provided on the side of the mounting portion. A hollow armrest extending rearward from the cockpit side and, Including, The operating member is disposed on the armrest on an opposite side to the mounting portion, The operation support mechanism includes a neutral return mechanism that returns the operating member to a neutral position from an operating position to which the operating member is operated, and a swing restriction mechanism that restricts an operation amount of the operating member from the neutral position. a rotation shaft that rotates about an axis by a swing operation of the operating member; and a shaft support member that supports the rotation shaft so that the rotation shaft can rotate about the axis; and housed within the hollow interior of the armrest. The pivot shaft is arranged extending in the width direction of the aircraft body with one end side protruding from the armrest on the side opposite the mounting portion, the operating member is fixed to the one end side of the pivot shaft, and the angle sensor is housed inside the mounting portion and engages with the other end side of the pivot shaft in the width direction of the aircraft body. Effect of the Invention

[0007] According to the above-mentioned working machine, by forming the armrest hollow and accommodating an operation support mechanism equipped with a neutral return mechanism and a swing restriction mechanism within the hollow interior of the armrest, it is possible to prevent the operation support mechanism supporting the operating member from protruding below the armrest. [Brief description of the drawings]

[0008] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 4 is a perspective view of the first structure as seen from below. [Figure 8] FIG. 2 is a perspective view of the control console body from below. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. 2 is a top perspective view of the hinge mechanism. [Figure 13] FIG. [Figure 14] FIG. 13 is a perspective view showing a state in which the movable member abuts against the damper. [Figure 15] 13 is a perspective view showing a state in which the movable member is in contact with the contact member. FIG. [Figure 16] FIG. [Figure 17] FIG. 4 is a plan view of the second cam. [Figure 18] FIG. 4 is a perspective view showing the first cam and the second cam in a lowered position. [Figure 19] FIG. 4 is a perspective view showing the first cam and the second cam in a raised position. [Figure 20] FIG. 4 is a bottom view of the inside of the second armrest as viewed from below. [Figure 21] FIG. 4 is a rear cross-sectional view of the support structure of the dozer lever. [Figure 22] FIG. 2 is a perspective view of a support structure for the dozer lever. [Diagram 23] FIG. 2 is an exploded perspective view of a part of the support structure of the dozer lever. [Figure 24] FIG. [Diagram 25] FIG. [Figure 26] FIG. [Figure 27] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic plan view showing the overall configuration of a working machine 1 according to this embodiment. Fig. 2 is a schematic side view of the working machine 1. In this embodiment, a backhoe, which is a rotating working machine, is exemplified as the working machine 1. As shown in Figures 1 and 2, the working machine 1 includes a machine body (swivel base) 2, a traveling device 3, and a working device 4. A cabin 5 is mounted on the machine body 2. Inside the cabin 5, a driver's seat (seat) 6 where a driver (operator) sits is provided. In other words, the driver's seat 6 is mounted on the machine body 2, and the cabin 5 surrounds the driver's seat 6. The driver's seat 6 has a seat portion 6A where the driver sits, and a backrest portion 6B where the driver's back is supported.

[0010] In this embodiment, the direction toward the front of the driver (operator) seated in the driver's seat 6 of the work machine 1 (the direction of arrow A1 in Figures 1 and 2) is the forward direction, the direction toward the rear of the driver (the direction of arrow A2 in Figures 1 and 2) is the rear direction, the direction of arrow K1 in Figures 1 and 2 is the fore-and-aft direction, the left side of the driver (the direction of arrow B1 in Figure 1) is the left side, and the right side of the driver (the direction of arrow B2 in Figure 1) is the right side. As shown in FIG. 1, the horizontal direction perpendicular to the front-rear direction K1 is described as the body width direction K2 (width direction of the body 2). The direction from the center of the width direction of the body 2 to the right or left is described as the body outside (outside of the body width direction K2). In other words, the body outside is the direction in the body width direction K2 that moves away from the center of the width direction of the body 2. The direction opposite to the body outside is described as the body inside (inside of the body width direction K2). In other words, the body inside is the direction in the body width direction K2 that moves closer to the center of the width direction of the body 2.

[0011] As shown in Figures 1 and 2, the traveling device 3 is a crawler type traveling device that supports the machine body 2 so that it can travel, and includes a traveling frame 3A, a first traveling device 3L provided on the left side of the traveling frame 3A, and a second traveling device 3R provided on the right side of the traveling frame 3A. The first traveling device 3L is driven by a first traveling motor M1, and the second traveling device 3R is driven by a second traveling motor M2. The first traveling motor M1 and the second traveling motor M2 are configured by hydraulic motors (hydraulic actuators).

[0012] As shown in Fig. 2, a dozer device 7 is attached to the front of the traveling device 3. The dozer device 7 has a dozer arm 7A whose rear part is pivotally supported by the traveling frame 3A and which can swing up and down, and a dozer blade 7B provided on the front part of the dozer arm 7A. The dozer device 7 can be raised and lowered (the dozer blade 7B can be raised and lowered) by extending and retracting a dozer cylinder (hydraulic actuator).

[0013] As shown in FIG. 2, the machine body 2 is supported on the traveling frame 3A via a swivel bearing 8 so as to be rotatable around the swivel axis X1. The machine body 2 is driven to rotate by a swivel motor M3. The swivel motor M3 is a hydraulic motor (hydraulic actuator, hydraulic equipment). The machine body 2 has a base plate (hereinafter referred to as a swivel base plate) 9 supported on the swivel bearing 8 so as to be rotatable around the swivel axis X1. The swivel base plate 9 is made of a steel plate or the like, and constitutes the bottom of the machine body 2. On the upper surface of the swivel base plate 9, vertical ribs 9A as reinforcing members are provided from the front to the rear. In addition to the vertical ribs 9A, the swivel base plate 9 is provided with support members and the like for supporting mounted objects such as equipment mounted on the machine body 2, thereby forming a swivel frame that serves as the skeleton of the machine body 2. The horizontal periphery of the swivel frame is covered by a swivel cover 12.

[0014] As shown in Figures 1 and 2, a weight 10 is provided at the rear of the aircraft body 2, and a fuel tank T1 for storing fuel for the prime mover E1 and a hydraulic oil tank T2 for storing hydraulic oil are arranged in front of the weight 10 along the aircraft width direction K2. As shown in Fig. 1, the cabin 5 is mounted on one side (left side) of the fuselage 2 in the width direction K2. A prime mover E1 is mounted on the other side (right side) of the fuselage 2 in the width direction K2. The prime mover E1 is a diesel engine. Note that the prime mover E1 may be a gasoline engine, an LPG engine, or an electric motor, or may be a hybrid type having an engine and an electric motor.

[0015] A hydraulic pump P1 is provided at the rear of the prime mover E1. The hydraulic pump P1 is driven by the prime mover E1 to pressurize and discharge hydraulic oil used in a hydraulic drive unit. The hydraulic drive unit is, for example, a hydraulic actuator or the like provided on the work machine 1. A radiator R1 that cools the cooling water of the prime mover E1, an oil cooler O1 that cools the hydraulic oil, and a condenser D1 that cools the refrigerant of an air conditioner provided on the work machine 1 are provided in front of the prime mover E1.

[0016] 1, a control device U1 is provided below the cabin 5. The control device U1 is configured using, for example, a microcomputer including a CPU (Central Processing Unit), an EEPROM (Electrically Erasable Programmable Read-Only Memory), and the like. A swivel joint (hydraulic device) S1 is provided at the position of the rotation axis X1. The swivel joint S1 is a hydraulic device that circulates hydraulic oil, and is a rotary joint that circulates hydraulic oil between the hydraulic device on the machine body 2 side and the hydraulic device on the traveling device 3 side. A control valve (hydraulic device) V1 is disposed behind the swivel joint S1. The control valve V1 is a hydraulic device that is configured by aggregating control valves that control hydraulic actuators such as hydraulic cylinders and hydraulic motors equipped on the work machine 1. The control valves that constitute the control valve V1 are switching valves that switch the direction of hydraulic oil for the hydraulic actuators, and are electrically controlled by the control device U1, and for example, solenoid valves are used. The control valves that constitute the control valve V1 are, for example, control valves that control the first traveling motor M1, the second traveling motor M2, the rotation motor M3, the dozer cylinder, the swing cylinder C2, the boom cylinder C3, the arm cylinder C4, the bucket cylinder C5, and hydraulic attachments that are attached instead of or in addition to the bucket 24.

[0017] 1 and 2, a swing bracket 21 is attached to the front portion of the support bracket 20 (the portion protruding from the machine body 2) via a swing shaft 26 so as to be swingable about a vertical axis. A working device 4 is attached to the swing bracket 21. 2, the working device 4 has a boom 22, an arm 23, and a bucket (working tool) 24. A base 22A of the boom 22 is pivotally attached to an upper portion of the swing bracket 21 via a boom pivot 27 so as to be rotatable about a horizontal axis (an axis extending in the machine body width direction K2). This allows the boom 22 to swing up and down.

[0018] The arm 23 is pivotally mounted on the tip of the boom 22 so as to be rotatable about a horizontal axis. This allows the arm 23 to swing back and forth or up and down. The bucket 24 is provided on the tip of the arm 23 so as to be capable of scooping and dumping operations. The scooping operation is an operation in which the bucket 24 is swung in a direction approaching the boom 22, for example, an operation for scooping up soil and sand. The dumping operation is an operation in which the bucket 24 is swung in a direction away from the boom 22, for example, an operation for dropping (discharging) the scooped soil and sand.

[0019] The work machine 1 can be equipped with other working tools (hydraulic attachments) that can be driven by a hydraulic actuator, instead of or in addition to the bucket 24. Examples of other working tools include a hydraulic breaker, a hydraulic crusher, an angle broom, an earth auger, a pallet fork, a sweeper, a mower, and a snow blower. The swing bracket 21 is capable of swinging by extension and retraction of a swing cylinder C2 provided on the machine body 2. The boom 22 is capable of swinging by extension and retraction of a boom cylinder C3. The arm 23 is capable of swinging by extension and retraction of an arm cylinder C4. The bucket 24 is capable of scooping and dumping by extension and retraction of a bucket cylinder (tool cylinder) C5. The swing cylinder C2, boom cylinder C3, arm cylinder C4, and bucket cylinder C5 are configured by hydraulic cylinders (hydraulic actuators).

[0020] 1 and 3, a door 53 is provided on a side surface (left side surface) of the cabin 5. A rear portion of the door 53 is supported by a hinge 61 so as to be rotatable about a vertical axis, and by rotating about the hinge 61, a front portion of the door 53 moves outward in the aircraft width direction K2 to open and close a boarding / alighting opening 62. The boarding / alighting opening 62 is an opening through which the driver gets on and off the cabin 5 (driver's seat 6).

[0021] As shown in Fig. 3, the driver's seat 6 is supported on the floor 5B constituting the bottom of the cabin 5 via a seat base 76 and the like. The driver's seat 6 is disposed in the center of the cabin 5 in the width direction K2 of the aircraft. The seat base 76 is attached on the floor 5B and in the center of the cabin 5 in the width direction K2 of the aircraft. A suspension device 77 is provided on the seat base 76, and the driver's seat 6 is provided on the suspension device 77 via a slide rail 78 so that its fore-aft position can be adjusted.

[0022] An air conditioner main body 63 of the air conditioner is provided inside the seat base 76. The air conditioner main body 63 has an evaporator and a blower fan. The conditioned air blown out from the air conditioner main body 63 is guided to a duct 66B provided at the front part of the cabin 5 via a duct 66A provided at the bottom part of the cabin 5, and is blown out onto the windshield of the cabin 5 from an outlet provided at the top of the duct 66B.

[0023] A control device 41 is provided inside the cabin 5. The control device 41 is provided in front of the driver's seat 6. The driver's seat 6 and the control device 41 constitute a driving section 42 that drives the working machine 1 (driving the machine body 2, the traveling device 3, the working device 4, the swing bracket 21, etc.). In this embodiment, a configuration (cabin specification) in which the driving section 42 is disposed inside the cabin 5 will be described, but the present invention is not limited to this. The driving section 42 may be configured such that the front-rear direction K1 and the machine body width direction K2 of the driving section 42 are open to the outside and the upper part is covered with a roof (canopy) (canopy specification), or the driving section 42 may be configured such that the front-rear direction K1, the machine body width direction K2, and the upper part are open to the outside.

[0024] As shown in FIGS. 3 and 4, the control device 41 has a control stand 81, a control member 82, a monitor 84, a travel control member 85, a control lever (control member) 80, and the like. As shown in Fig. 4, the control console 81 is provided in front of the driver's seat 6 on the aircraft body 2. The control console 81 is also provided on the central side of the cabin 5 in the aircraft width direction K2. In other words, the control console 81 is provided with its center in the aircraft width direction K2 approximately coinciding with the center of the cabin 5 in the aircraft width direction K2. The control console 81 has a base 86 erected on the floor 5B (aircraft body 2) and a control console main body 87 arranged on top of the base 86.

[0025] As shown in Figs. 4 and 5, the control member 82 is a member that is gripped and operated by the driver. The control member 82 is attached to the control stand main body 87 (control stand 81). The control member 82 includes a first control handle 82L and a second control handle 82R. The first control handle 82L is provided on one side (left side) of the center of the control stand main body 87 in the vehicle width direction K2. The second control handle 82R is provided on the other side (right side) of the center of the control stand main body 87 in the vehicle width direction K2, side by side in the vehicle width direction K2 to the side of the first control handle 82L.

[0026] As shown in Figs. 4 and 5, the first control handle 82L and the second control handle 82R are devices capable of operating two control objects provided on the work machine 1. The first control handle 82L can, for example, rotate the machine body 2, which is the first control object, and can swing the arm 23, which is the second control object. The second control handle 82R can, for example, swing the bucket 24, which is the first control object, and can swing the boom 22, which is the second control object. The operation direction and swing amount of the control member 82 are detected by an angle sensor. A detection signal from this angle sensor is sent to the control device U1. The control device U1 controls a control valve that controls the control object based on the detection signal from the angle sensor.

[0027] As shown in Figures 4 and 5, the monitor 84 is disposed in the center (between the first control handle 82L and the second control handle 82R) in the machine body width direction K2 on the upper surface side of the control platform main body 87, and is located in front of the driver who operates the work machine 1 in a forward leaning position while gripping the first control handle 82L and the second control handle 82R. The monitor 84 has a display unit (screen) 84A on the rear surface for displaying information. The display unit 84A displays basic information about the work machine 1, images of the surroundings of the work machine 1, information necessary for making various settings of the work machine 1, and the like.

[0028] Provided below the display unit 84A of the monitor 84 are a first switch 84B which is a switch for changing the rotation speed of the prime mover E1, a second switch 84C which is a switch for setting the work speed of the work machine 1, and a third switch 84D which is a switch for turning on and off lights equipped on the work machine 1, such as a boom light, headlight, taillight, etc. On the left side of the first operation handle 82L, there are provided a plurality of operating devices (first operating device 44A, second operating device 44B, third operating device 44C) for operating display items displayed on the screen. The first operating device 44A is rotated to change the selection item candidates among the plurality of selection items displayed on the display unit 84A. The selection item is determined by pressing the third operating device 44C. In addition, the second operating device 44B is pressed to cancel the determined selection item.

[0029] As shown in FIG. 4, the travel operation members 85 are provided on the floor 5B. The travel operation members 85 are provided on the left and right of the base 86 of the operation stand 81. The travel operation members (referred to as travel pedals) 85 are pedals that operate the travel devices 3 by stepping on them, and the left travel pedal 85 operates the first travel device 3L (first travel motor M1), and the right travel pedal 85 operates the second travel device 3R (second travel motor M2). The amount and direction of depression of the travel pedals 85 are detected by angle sensors. A detection signal from the angle sensor is sent to the control device U1, and the control device U1 controls the control valves that control the travel motors M1 and M2 based on the detection signal from the angle sensor.

[0030] The operation lever 80 is a dozer lever for operating the dozer device 7. The driving section 42 is provided with a swing operation member (for example, a first operation handle 82L or a second operation handle 82L) for swinging the swing bracket 21. R A seesaw switch (not shown) is provided on the top of the swing cylinder. The amount and direction of operation of the swing operation member are also detected by an angle sensor. A detection signal from the angle sensor is sent to a control device U1, which controls a control valve that controls the swing cylinder based on the detection signal from the angle sensor.

[0031] As shown in Fig. 6, the base 86 has, at its upper part, a mounting bracket 91 to which the control console main body 87 is attached. As shown in Figs. 4 and 5, the control console main body 87 has a mounting part 92 at the center in the fuselage width direction K2, and armrests 93 provided on the left and right of the mounting part 92. The mounting part 92 is detachably attached to the mounting bracket 91 of the base 86. The armrest 93 located on the left side of the mounting part 92 (the boarding / alighting entrance 62 side) is referred to as a first armrest 93L, and the armrest 93 located on the right side of the mounting part 92 is referred to as a second armrest 93R.

[0032] The first armrest 93L has an armrest base 93L1 provided on the left side of the attachment portion 92, and an armrest main body 93L2 pivotally supported at the rear of the armrest base 93L1. The second armrest 93R has an armrest base 93R1 provided on the right side of the attachment portion 92, and an armrest main body 93R2 formed integrally with the armrest base 93R1.

[0033] The armrest main body 93L2 extends rearward (toward the driver's seat 6) from the armrest base 93L1. The armrest main body 93R2 also extends rearward (toward the driver's seat 6) from the armrest base 93R1. In other words, the armrest 93 is provided on the driver's stand 81 and extends from the driver's stand 81 side to the driver's seat 6 side. As shown in Figs. 9 and 27, the undersides 93a of the armrests 93 (first armrest 93L and second armrest 93R) are formed as inclined surfaces that transition upward toward the rear. This allows the space below the armrests 93 to be wider toward the driver's seat 6. In the driver's section 42 of this embodiment, the driver's left leg is positioned below the first armrest 93L, and the driver's right leg is positioned below the second armrest 93R. By forming the undersides 93a of the armrests 93 as inclined surfaces that transition upward toward the rear, a wider space can be provided for arranging the driver's legs.

[0034] As shown in Fig. 4 and Fig. 5, the armrest main body 93L2 and the armrest main body 93R2 have an elbow rest 93A on the rear of which the driver's elbow is placed. The elbow rest 93A is formed of, for example, a material having cushioning properties. The driver places the elbow of his / her left arm on the elbow rest 93A of the first armrest 93L and grips the first steering handle 82L with his / her left hand, and places the elbow of his / her right arm on the elbow rest 93A of the second armrest 93R and grips the second steering handle 82R with his / her right hand. As a result, the driver operates the steering member 82 while seated in the driver's seat 6 with his / her upper body in a forward-leaning position.

[0035] As shown in Figure 5, the control platform main body 87 can also be said to be composed of a first component 87A including the mounting portion 92, the armrest base 93L1 of the first armrest 93L, and the second armrest 93R, and a second component 87B including the armrest main body 93L2 of the first armrest 93L. As shown in Fig. 6, the first structural body 87A has an upper body 94 and a lower body 95. As shown in Fig. 7, the upper body 94 has an upper wall 96 and a peripheral wall 97 extending downward from the edge of the upper wall 96, and is formed with a downward opening. The upper body 94 is also configured by integrally forming, from resin, a structural part (referred to as a first structural part) 94A constituting the mounting portion 92, a structural part (referred to as a second structural part) 94B constituting the armrest base 93L1 of the first armrest 93L, and a structural part (referred to as a third structural part) 94C constituting the second armrest 93R.

[0036] As shown in FIG. 6, the upper wall 96 is provided with a first mounting portion 96A to which the operating member 82 is attached, a second mounting portion 96B to which the monitor 84 is attached, a third mounting portion 96C to which the first switch 84B, the second switch 84C, and the third switch 84D are attached, and a fourth mounting portion 96D to which the first operating device 44A, the second operating device 44B, and the third operating device 44C are attached.

[0037] As shown in FIG. 7, the peripheral wall 97 has a first wall 97a to a ninth wall 97i. The first wall 97a constitutes a front portion of the first component part 94A, and the second wall 97b constitutes a rear portion of the first component part 94A. The third wall 97c constitutes a left portion of the second component part 94B, the fourth wall 97d constitutes a front portion of the second component part 94B, and the fifth wall 97e constitutes a rear portion of the second component part 94B. The sixth wall 97f constitutes a left portion of the third component part 94C, the seventh wall 97g constitutes a right portion of the third component part 94C, the eighth wall 97h constitutes a front portion of the third component part 94C, and the ninth wall 97i constitutes a rear portion of the third component part 94C.

[0038] 8, the lower body 95 is a lid that closes the lower end opening of the upper body 94. The first component 87A is formed to be hollow by covering the inner space (lower space) of the upper body 94 from below with the lower body 95. In other words, the attachment portion 92, the first armrest 93L, and the second armrest 93R are formed to be hollow. The lower body 95 has a first portion 95A corresponding to the first component portion 94A, a second portion 95B corresponding to the second component portion 94B, and a third portion 95C corresponding to the third component portion 94C.

[0039] As shown in Fig. 8, the first part 95A is formed to protrude downward from the lower end of the upper body 94, and also covers the mounting bracket 91 of the base 86. As shown in Fig. 6, the first part 95A has a main part 95Aa which is integrally formed with the second part 95B and the third part 95C and covers the left and right sides, rear and lower part of the mounting bracket 91, and a sub part 95Ab which covers the front of the mounting bracket 91. By removing the sub part 95Ab, the main part 95Aa (lower body 95) can be removed while leaving the upper body 94 attached to the base 86.

[0040] As shown in FIG. 9 , the first armrest 93L (armrest 93) is configured to be switchable between a first position 98 and a second position 99. The first position 98 is a position that prevents the driver from getting on and off the driver's seat 6. More specifically, the first position 98 is a position that prevents the driver from getting on and off through the boarding and alighting passage between the driver's seat 6 and the boarding / alighting entrance 62. The second position 99 is a position that allows the driver to get on and off the driver's seat 6. More specifically, the second position 99 is a position that allows the driver to get on and off through the boarding and alighting passage between the driver's seat 6 and the boarding / alighting entrance 62.

[0041] In this embodiment, the armrest main body 93L2 of the first armrest 93L can be moved between a lowered position 100 extending from the armrest base 93L1 toward the driver's seat 6 as shown by a solid line in Fig. 9, and a raised position 101 rotated approximately 90° upward from the lowered position 100 as shown by a two-dot chain line in Fig. 9. The first position 98 is formed by moving the armrest main body 93L2 of the first armrest 93L to the lowered position 100, and the second position 99 is formed by moving it to the raised position 101.

[0042] In the first position 98, the operation of the operation objects (boom cylinder C3, arm cylinder C4, bucket cylinder C5, swing motor M3) operated by the operation member 82 is permitted, and in the second position 99, the operation of the operation objects is prevented. Note that the hydraulic actuators whose operation is permitted or prevented by switching the first armrest 93L between the first position 98 and the second position 99 are not limited to the boom cylinder C3, arm cylinder C4, bucket cylinder C5, and swing motor M3 described above, and other hydraulic actuators (first travel motor M1, second travel motor M2, swing cylinder C2, dozer cylinder, etc.) may also be added. In other words, when the first armrest 93L is in the first position 98, the operation of the hydraulic actuators mounted on the work machine 1 is permitted, and when the first armrest 93L is in the second position 99, the operation of the hydraulic actuators mounted on the work machine 1 is prevented.

[0043] The operation of the hydraulic actuator is permitted when a member that operates the hydraulic actuator is operated, and the control device U1 controls the current supplied to the corresponding control valve (or sends a signal to the corresponding control valve), causing the hydraulic actuator to operate. The operation of the hydraulic actuator is prevented when a member that operates the hydraulic actuator is operated, and the control device U1 does not send a signal to the corresponding control valve, causing the hydraulic actuator to not operate.

[0044] The position of the armrest main body 93L2 is detected by a detection switch 102. As shown in Figures 10 and 11, the detection switch 102 is provided on the armrest base 93L1. In detail, the detection switch 102 has a switch main body 102A that is housed in the right part of the rear end side of the armrest base 93L1 and attached to the armrest base 93L1, and a contact 102B that protrudes rearward from the armrest base 93L1.

[0045] In detecting the position of the armrest main body 93L2, when the armrest main body 93L2 is located in the lowered position 100, the armrest main body 93L2 comes into contact with (presses) the contactor 102B, thereby detecting that the armrest main body 93L2 is in the lowered position 100. Also, when the armrest main body 93L2 is rotated from the lowered position 100 to the raised position 101 and the armrest main body 93L2 moves away from the contactor 102B, it is detected that the armrest main body is not in the lowered position 100, that is, in the raised position 101.

[0046] The switch body 102A is connected to the control device U1. The control device U1 can acquire detection information of the detection switch 102. When the control device U1 acquires information that the armrest body 93L2 is in the lowered position 100, it allows the operation of the hydraulic actuator mounted on the work machine 1, and when the control device U1 acquires information that the armrest body 93L2 is not in the lowered position 100 (is in the raised position 101), it prevents the operation of the hydraulic actuator mounted on the work machine 1.

[0047] In addition, when it is detected that the armrest main body 93L2 is in the lowered position 100, the operation of the hydraulic actuator mounted on the work machine 1 may be prevented by pressing a switch provided on the work machine 1, for example, the second switch 84C. In addition, when it is detected that the armrest body is in the raised position 101, by pressing a switch provided on the work machine 1, for example, the second switch 84C, the prevention of operation of the hydraulic actuator mounted on the work machine 1 may be released, and operation of the hydraulic actuator may be permitted.

[0048] 8, a recess 103 is formed on the underside of the armrest main body 93L2 of the first armrest 93L. By forming the recess 103, for example, when the armrest main body is lifted from the lowered position 100, a finger or the like can be hooked in the recess 103. As shown in FIG. 10, the first armrest 93L incorporates a hinge mechanism 105 that rotatably supports the armrest main body 93L2 on the armrest base portion 93L1.

[0049] As shown in FIGS. 10 and 12, the hinge mechanism 105 has a fixed member 104, a shaft 106, a movable member 107, and a holding mechanism 108. 10 and 11, a protrusion 109 that protrudes rearward is formed at the rear of the armrest base 93L1 (second component part 94B), and a recess 110 into which the protrusion 109 is inserted is formed at the front of the armrest main body. The hinge mechanism 105 is incorporated into the joint between the rear of the armrest base 93L1 and the front of the armrest main body 93L2.

[0050] As shown in FIG. 10 and FIG. 12, the fixed side member 104 is accommodated in the rear of the armrest base 93L1 (second component part 94B). The fixed side member 104 includes a pair of fixed hinges (first fixed hinge 104L, second fixed hinge 104R) arranged at an interval in the fuselage width direction K2. The first fixed hinge 104L and the second fixed hinge 104R each have a fixed part 104A attached to the armrest base 93L1 via a bolt or the like, and a support part 104B (first support part 104B1, second support part 104B2) provided at the rear of the fixed part 104A. The first support part 104B1 is arranged on the left side within the protruding part 109, and the second support part 104B2 is arranged on the right side within the protruding part 109. The fixed portion 104A of the first fixed hinge 104L and the fixed portion 104A of the second fixed hinge 104R are connected by a connecting member 111.

[0051] The shaft 106 is supported by the fixed-side member 104 and rotates integrally with the armrest main body 93L2. The shaft 106 is inserted between the first support portion 104B1 and the second support portion 104B2 so as to be rotatable about its axis. That is, the first support portion 104B1 supports one end side of the shaft 106 in the axial direction, and the second support portion 104B2 supports the other end side of the shaft 106 in the axial direction. The shaft 106 protrudes from the first support portion 104B1 and protrudes leftward from the protruding portion 109, and also protrudes from the second support portion 104B2 and protrudes rightward from the protruding portion 109.

[0052] As shown in Figures 10 and 11, the movable member 107 rotates integrally with the shaft 106 and is attached to the armrest main body 93L2. The movable member 107 includes a pair of movable hinges (a first movable hinge 107L and a second movable hinge 107R) that are arranged side by side at an interval in the aircraft width direction K2 and are attached to the left and right of the front part of the armrest main body 93L2. The first movable hinge 107L and the second movable hinge 107R each have a fixed part 107A that is attached to the armrest main body 93L2 and a shaft attachment part 107B (a first shaft attachment part 107B1 and a second shaft attachment part 107B2) provided in front of the fixed part 107A.

[0053] As shown in Fig. 13, the movable-side member 107 (fixed portion 107A) is attached to a core material 112 formed of a plate material via a bolt or the like. The core material 112 is the core material 112 of the armrest main body 93L2, and is embedded in the armrest main body 93L2 as shown in Fig. 10. The armrest main body 93L2 is formed with an insertion portion 113 (see Fig. 10) through which the fixed portion 107A of the movable-side member 107 is inserted, and a bolt insertion hole 114 (see Fig. 8) through which a bolt is inserted. The fixed portion 107A of the movable-side member 107 (first movable hinge 107L, second movable hinge 107R) is inserted into the armrest main body 93L2, and the fixed portion 107A is fixed to the core material 112 by a bolt inserted through the bolt insertion hole 114, whereby the movable-side member 107 is attached to the core material 112.

[0054] 13, the core material 112 has an extension portion 115 extending forward from the right end side of the core material 112, and an abutment portion 116 provided in front of the extension portion 115. When the armrest main body 93L2 is in the lowered position 100, the abutment portion 116 abuts against the contactor 102B of the detection switch 102 directly or via a resin member that constitutes the armrest main body 93L2.

[0055] 11, the first shaft mounting portion 107B1 is disposed on the left side within a recess 110 of the armrest main body 93L2, and the second shaft mounting portion 107B2 is disposed on the right side within the recess 110. As shown in Fig. 12, the first shaft mounting portion 107B1 is attached to the left end side of the shaft 106 so as to be integrally rotatable, and the second shaft mounting portion 107B2 is attached to the right end side of the shaft 106 so as to be integrally rotatable.

[0056] The first movable hinge 107L and the second movable hinge 107R are first assembled to the shaft 106, and then attached to the armrest main body 93L2 after being assembled to the shaft 106. As shown in Fig. 10 and Fig. 12, a spacer 117 is interposed between the first support portion 104B1 and the first shaft mounting portion 107B1 and between the second support portion 104B2 and the second shaft mounting portion 107B2.

[0057] As described above, the armrest main body 93L2 is rotatable about the shaft 106 relative to the armrest base 93L1 in a raising direction 118 (see FIG. 9) in which the armrest main body 93L2 is rotated from the lowered position 100 to the raised position 101, and in a lowering direction 119 (see FIG. 9) in which the armrest main body 93L2 is rotated from the raised position 101 to the lowered position 100. In other words, the armrest main body 93L2 can be switched between the lowered position 100 and the raised position 101 by rotating it about the shaft 106.

[0058] As shown in Fig. 12, the first shaft mounting portion 107B1 and the second shaft mounting portion 107B2 are each provided with a first abutment portion (damper abutment portion) 120 and a second abutment portion 121. As shown in Fig. 11, when the armrest main body 93L2 is in the lowered position 100, the first abutment portion 120 is located below the first shaft mounting portion 107B1 and the second shaft mounting portion 107B2, and the second abutment portion 121 is located above the first shaft mounting portion 107B1 and the second shaft mounting portion 107B2.

[0059] As shown in Figs. 10 and 11, the armrest base 93L1 is provided with a damper 122 that comes into contact with the armrest main body 93L2 when the armrest main body 93L2 is switched from the raised position 101 to the lowered position 100, thereby absorbing and mitigating (reducing) the impact when the armrest main body 93L2 is rotated from the raised position 101 to the lowered position 100. For example, a hydraulic damper is used as the damper 122. The dampers 122 are provided in a pair (first damper 122L, second damper 122R). The first damper 122L is disposed to the left of the protruding portion 109, and the second damper 122R is disposed to the right of the protruding portion 109. In addition, a first contact member 123L is provided in the portion where the first damper 122L is provided, and a second contact member 123R is provided in the portion where the second damper 122R is provided.

[0060] As shown in Figure 14, when the armrest main body 93L2 is in the lowered position 100, the first abutment portion 120 of the first shaft mounting portion 107B1 abuts against the first damper 122L, and the first abutment portion 120 of the second shaft mounting portion 107B2 abuts against the second damper 122R. As shown in Figure 15, when the armrest main body 93L2 is in the raised position 101, the second abutment portion 121 of the first shaft mounting portion 107B1 abuts against the first contact member 123L, and the second abutment portion 121 of the second shaft mounting portion 107B2 abuts against the second contact member 123R.

[0061] The damper 122 may be provided in the armrest main body 93L2. In this case, when the armrest main body 93L2 is switched to the lowered position 100, the damper 122 abuts against the armrest base 93L1. The damper 122 does not necessarily have to be provided, and may not be provided at all. Also, instead of the damper 122, a member having cushioning properties may be used as a stopper.

[0062] The holding mechanism 108 is a mechanism for holding the armrest main body 93L2 at the lowered position 100 and the raised position 101. As shown in Fig. 10 and Fig. 12, the holding mechanism 108 is compactly incorporated between the first support part 104B1 and the second support part 104B2. The holding mechanism 108 has a first cam (first member) 126 attached to the fixed side member 104, a second cam (second member) 127 supported on the shaft 106 so as to be integrally rotatable and axially slidable, and a spring member 128 for pressing the second cam 127 against the first cam 126.

[0063] The first cam 126 is disposed on the right side of the first support portion 104B1, fitted onto the shaft 106 (inserted through the shaft 106), and fixed to the first support portion 104B1 with a bolt or the like. The second cam 127 is disposed on the right side of the first cam 126, and is fitted onto the shaft 106 so as to be axially slidable and integrally rotatable therewith.

[0064] The spring member 128 is formed of a compression coil spring and is fitted on the outer periphery of the shaft 106 between the second cam 127 and the second support portion 104B2. The spring member 128 has an axis in the same direction as the axis of the shaft 106, and is interposed between the second cam 127 and the second support portion 104B2 in a compressed state. Therefore, the biasing force of the spring member 128 acts in a direction to press the second cam 127 against the first cam 126. The second cam 127 is pressed against the first cam 126 to generate a force to hold the armrest main body 93L2 at the raised position 101 and the lowered position 100, and a force to hold the first armrest 93L in the lowered position 100, the raised position 101, and between the lowered position 100 and the raised position 101 so as not to rattle.

[0065] 16, a cam protrusion 129 protruding toward the second cam 127 is formed on the surface of the first cam 126 facing the second cam 127. A pair of cam protrusions 129 are provided. The pair of cam protrusions 129 are disposed at symmetrical positions across the shaft 106 (symmetrical positions in the radial direction of the shaft 106). 17, a cam slope 130 that abuts against the cam protrusion 129 is provided on the surface of the second cam 127 facing the first cam 126. A pair of cam slopes 130 is provided corresponding to the pair of cam protrusions 129. Each cam slope 130 has an apex 130a that is closest to the first cam 126, and a first slope 130b and a second slope 130c that are formed on either side of the apex 130a, with the first slope 130b being on the upward direction 118 side of the apex 130a and the second slope 130c being on the downward direction 119 side of the apex 130a.

[0066] 18 shows a state in which the armrest main body 93L2 is in the lowered position 100. When the armrest main body 93L2 is rotated from this lowered position 100 to the raised position 101, the cam projection 129 abuts against the first inclined surface 130b and also passes over the apex 130a to abut against the second inclined surface 130c. 19, when the armrest main body 93L2 is in the raised position 101, the cam projection 129 is in contact with the second inclined surface 130c, and the biasing force of the spring member 128 acts to rotate the armrest main body 93L2 in the raised direction 118. Also, in order for the armrest main body 93L2 to rotate from the raised position 101 to the lowered direction 119, the cam projection 129 must compress the spring member 128 and overcome the apex 130a of the cam inclined surface 130 before the armrest main body 93L2 can be lowered. As a result, the armrest main body 93L2 is held in the raised position 101.

[0067] Furthermore, the cam protrusion 129 abuts against the first inclined surface 130b to generate a force that assists the rotation of the armrest main body 93L2 in the lowering direction 119, and the cam protrusion 129 abuts against the second inclined surface 130c to generate a force that assists the rotation of the armrest main body 93L2 in the raising direction 118. In other words, the cam protrusion 129 and the cam inclined surface 130 abut against each other to apply the biasing force of the spring member 128 in a direction that assists the rotation of the armrest main body 93L2 so as to rotate the armrest main body 93L2 from a midway position between the lowered position 100 and the raised position 101 to the lowered position 100 side and to rotate the armrest main body 93L2 from the midway position to the raised position 101 side to the raised position 101.

[0068] In the holding mechanism 108 of this embodiment, the first cam 126, the second cam 127, and the spring member 128 are mounted (coaxially) on the shaft 106, so that the holding mechanism 108 can be configured compactly and can be stored compactly within the vertical thickness of the armrest 93. Alternatively, the cam projection 129 may be formed on the second cam 127 , and the cam slope 130 may be formed on the first cam 126 .

[0069] 20 and 21, a steering mechanism 131 is attached to the second armrest 93R. The steering mechanism 131 is a mechanism for steering the dozer device 7. The steering mechanism 131 includes a dozer lever (operating member) 80, an angle sensor 132 for detecting the operation direction (swing direction) and operation amount (swing amount) of the dozer lever 80, and an operation support mechanism 133 for supporting the dozer lever 80.

[0070] As shown in FIG. 5, the dozer lever 80 is disposed on the opposite side of the mounting portion 92 in the armrest base 93R1 of the second armrest 93R. In other words, it is disposed on the right side of the operator's platform body 87 (the armrest base 93R1 of the second armrest 93R). A recessed portion 88 recessed from right to left is formed on the right side of the armrest base 93R1. The dozer lever 80 has a grip 80A that the operator holds and a lever shaft 80B to which the grip 80A is attached at the upper portion. The dozer lever 80 is disposed on the right side of the operator's platform body 87 by inserting the lower portion of the lever shaft 80B into the recessed portion 88 from the right. The dozer lever 80 can be swung in the front-rear direction from a neutral position where the lever shaft 80B extends in the up-down direction, with the lower portion as the center. By swinging the dozer lever 80 forward from the neutral position, the dozer device 7 (dosser blade 7B) is lowered, and by swinging it backward, the dozer device 7 (dosser blade 7B) is raised.

[0071] As shown in Fig. 21, the angle sensor 132 is configured by, for example, a potentiometer. The angle sensor 132 is connected to the control device U1. The control device U1 can acquire detection information (operation direction and operation amount of the dozer lever 80) of the angle sensor 132. Therefore, a detection signal detected by the angle sensor 132 is sent to the control device U1, and the control device U1 electrically controls the control valve V2 that controls the dozer cylinder C1 based on the detection signal of the angle sensor 132.

[0072] As shown in Fig. 21, the angle sensor 132 is housed in the mounting portion 92 (the second component part 94B of the first component 87A) of the control platform main body 87. Since the angle sensor 132 is long in the vertical direction, if the angle sensor 132 is housed in, for example, the armrest base portion 93R1 of the second armrest 93R, a portion protruding downwards will be formed on the underside of the second armrest 93R, but by housing the angle sensor 132 in the mounting portion 92, it is possible to prevent a portion protruding downwards from being formed on the underside of the second armrest 93R. In other words, the underside of the second armrest 93R can be formed flat.

[0073] 20 to 23, the operation support mechanism 133 has a rotating shaft 134 fixed to the dozer lever 80, a shaft support member 135 that supports the rotating shaft 134 rotatably about its axis, a neutral return mechanism 136 that returns the dozer lever 80 from an operated operating position to a neutral position, and a swing restriction mechanism 137 that restricts the amount of operation of the dozer lever 80 from the neutral position. The operation support mechanism 133 is housed in the hollow interior of the second armrest 93R. In this embodiment, the operation support mechanism 133 is housed in the hollow interior of the armrest base 93R1 of the second armrest 93R.

[0074] 20 and 21, the rotating shaft 134 has an axis extending in a first horizontal direction 138, which is a direction along the machine body width direction K2, and is disposed below an upper wall 96 of the second armrest 93R (armrest base 93R1). The rotating shaft 134 is disposed protruding (to the left) in the machine body width direction K2 from an end side (one end side in the machine body width direction K2) of the second armrest 93R (armrest base 93R1) on the dozer lever 80 side. In this embodiment, the rotating shaft 134 is disposed across the second armrest 93R (armrest base 93R1) in the machine body width direction K2.

[0075] The right end (one end side in the axial direction) of the rotating shaft 134 protrudes from the second armrest 93R and is fixed to the lower end side of the lever shaft 80B of the dozer lever 80. The rotating shaft 134 is rotatable around an axis extending in a first horizontal direction 138, and the dozer lever 80 is disposed on one end side (right end side) in the axial direction of the rotating shaft 134 and rotates integrally with the rotating shaft 134. In other words, the rotating shaft 134 rotates around the axis by the swing operation of the dozer lever 80. The other end side (left end side) in the axial direction of the rotating shaft 134 is engaged with the detection shaft of the angle sensor 132. The angle sensor 132 detects the rotation direction of the rotating shaft 134 and the rotation angle around the axis. Thereby, the operation direction and operation amount of the dozer lever 80 are detected.

[0076] The direction along the fuselage width direction K2 includes a direction that coincides with the fuselage width direction K2 and a direction that is slightly inclined with respect to the fuselage width direction K2. In the illustrated example (see FIG. 20), the first horizontal direction 138 is slightly inclined in an inclination direction that transitions rearward as it moves rightward with respect to the fuselage width direction K2. 21 to 24, the shaft support member 135 has a tubular member 140 having an axis extending in a first horizontal direction 138, an attachment stay 141 fixed to an upper part of the tubular member 140, and a sensor bracket 142 fixed to the left end side of the tubular member 140. The tubular member 140 is concentrically fitted onto the left side of the rotating shaft 134 from a midway point. In other words, the left part of the rotating shaft 134 is inserted into the tubular member 140 so as to be rotatable around the axis.

[0077] 24, the mounting stay 141 is attached by a bolt or the like to a mounting portion 124 that protrudes downward from the lower surface of the upper wall 96. As shown in FIGS. 21 and 22, an angle sensor 132 is attached to the sensor bracket 142. 22, 23, and 25, the neutral return mechanism 136 is disposed above the right portion of the rotating shaft 134. More specifically, the neutral return mechanism 136 is disposed above the portion of the rotating shaft 134 that protrudes from the cylindrical member 140, between the upper wall 96 and the rotating shaft 134. The neutral return mechanism 136 has an interlocking arm 143, a spring device 144, and a bracket member 145. The interlocking arm 143 has a lower end fixed to the rotating shaft 134, and is provided on the rotating shaft 134 in such a manner as to protrude upward. In other words, the interlocking arm 143 rotates integrally with the rotating shaft 134.

[0078] As shown in Figures 22, 23 and 25, the spring device 144 has an interlocking shaft 146, a housing member 147 and a neutral return spring 148. The interlocking shaft 146 is disposed above the rotating shaft 134 along a second horizontal direction 139 (see Figure 20) that intersects (is perpendicular to) the first horizontal direction 138. One end (front end) of the interlocking shaft 146 is pivotally connected to the upper part of the interlocking arm 143 via a pin 149. The housing member 147 is disposed on the rear side of the interlocking shaft 146 and houses the other end (rear) of the interlocking shaft 146. The interlocking shaft 146 is supported by the housing member 147 so as to be movable in the axial direction, and can freely move forward and backward relative to the housing member 147.

[0079] As shown in FIG. 25, the neutral return spring 148 is formed by a compression coil spring and is accommodated in the spring accommodating portion 147A of the housing member 147. The neutral return spring 148 is arranged on the outer periphery of the interlocking shaft 146 with its axial direction coinciding with the axial direction of the interlocking shaft 146. Therefore, the neutral return spring 148 is arranged along the second horizontal direction 139 together with the interlocking shaft 146. This allows the neutral return mechanism 136 (operation support mechanism 133) to be configured with a thin thickness in the up-down direction. Furthermore, the components that constitute the neutral return mechanism 136 are arranged above the rotating shaft 134. That is, the neutral return mechanism 136 does not have any components that protrude below the rotating shaft 134. This prevents the neutral return mechanism 136 from interfering with a component or the like that is arranged below the rotating shaft 134.

[0080] Inside the spring accommodating portion 147A, a first spring receiving member 150 and a second spring receiving member 151 arranged behind the first spring receiving member 150 are provided. A neutral return spring 148 is interposed in a compressed state between the first spring receiving member 150 and the second spring receiving member 151. The first spring receiving member 150 has a cylindrical portion 150a fitted onto the outer periphery of the interlocking shaft 146 so as to be relatively movable in the axial direction, a first portion 150b that abuts against a contact restriction member 152 fixedly provided at the front portion inside the spring accommodating portion 147A, and a second portion 150c that engages with a step portion 146a formed on the interlocking shaft 146. The second spring support member 151 has a tubular portion 151a in which an end member 146b formed on the rear end side of the interlocking shaft 146 is accommodated so as to be movable relative to the axial direction of the interlocking shaft 146, a first portion 151b that abuts against a contact limiting member 153 fixedly provided at the rear part of the spring accommodating portion 147A, and a second portion 151c that engages with the end member 146b.

[0081] 23 and 25, the bracket member 145 has an upper wall 145a, a first side wall 145b extending downward from one side edge (left edge) of the upper wall 145a, and a second side wall 145c extending downward from the other side edge (right edge) of the upper wall 145a. The upper wall 145a is attached by bolts or the like to an attachment portion 154 protruding downward from the lower surface of a bracket attachment portion 156 of the upper wall 96 of the armrest base 93R1.

[0082] The first side wall 145b and the second side wall 145c have a pivot wall portion 145d formed at the rear portion and extending downward. Each pivot wall portion 145d is provided with a pivot pin 155. A supported portion 147B at the front portion of the housing member 147 is pivoted between the first side wall 145b and the second side wall 145c via the pivot pin 155 so as to be rotatable about an axis perpendicular to the axis of the interlocking shaft 146.

[0083] In the neutral return mechanism 136, when the dozer lever 80 is swung forward from the neutral position, the rotating shaft 134 rotates so that the interlocking arm 143 swings forward, and the interlocking shaft 146 moves forward. Then, the second spring bearing member 151 moves forward together with the end member 146b, and the neutral return spring 148 is compressed. When the dozer lever 80 is swung backward from the neutral position, the rotating shaft 134 rotates so that the interlocking arm 143 swings backward, and the interlocking shaft 146 moves backward. Then, the first spring bearing member 150 moves backward together with the step portion 146a of the interlocking shaft 146, and the neutral return spring 148 is compressed. When the swing operation of the dozer lever 80 is released, the dozer lever 80 is returned to the neutral position from the operating position where it was operated (swung) by the biasing force of the neutral return spring 148. In addition, an operating load is applied to the dozer lever 80 by a neutral return spring 148 .

[0084] 21, bracket attachment portion 156 to which bracket member 145 is attached in upper wall 96 is recessed from below to above. This makes it possible to increase the height of the lower surface of second armrest 93R and to increase the space below second armrest 93R. 23 and 26, the swing restriction mechanism 137 is arranged alongside the neutral return mechanism 136 along the rotation shaft 134. Specifically, the swing restriction mechanism 137 is arranged to the left of the neutral return mechanism 136. By arranging the swing restriction mechanism 137 alongside the neutral return mechanism 136 along the rotation shaft 134, the thickness of the operation support mechanism 133 in the up-down direction can be reduced.

[0085] The swing restriction mechanism 137 has a support piece 157 fixed to the rotating shaft 134, a restriction shaft 158 ​​provided on the support piece 157, and an abutment member 159 arranged above the rotating shaft 134 facing the support piece 157. The support piece 157 protrudes from the rotating shaft 134 in the second horizontal direction 139. Specifically, the support piece 157 includes a first support piece 157A protruding from the rotating shaft 134 to one side (front side) in the second horizontal direction 139, and a second support piece 157B protruding from the rotating shaft 134 to the other side (rear side) in the second horizontal direction 139. The first support piece 157A and the second support piece 157B have an insertion hole 160 formed in a penetrating shape. A nut member 161A is fixed to the portion of the first support piece 157A where the insertion hole 160 is formed and on the upper surface. A nut member 161B is also fixed to the portion of the second support piece 157B where the insertion hole 160 is formed and on the upper surface.

[0086] The regulating shaft 158 ​​is attached to the support piece 157 so as to be movable forward and backward with respect to the abutment member 159, and when the dozer lever 80 is swung from the neutral position, the regulating shaft 158 ​​abuts against the abutment member 159 to regulate the swing of the dozer lever 80. In detail, the regulating shaft 158 ​​includes a first regulating shaft 158A attached to the first support piece 157A and a second regulating shaft 158B attached to the second support piece 157B, the first regulating shaft 158A is inserted through an insertion hole 160 of the first support piece 157A and screwed into a nut member 161A, and the second regulating shaft 158B is inserted through an insertion hole 160 of the second support piece 157B and screwed into a nut member 161B. By screwing the first regulating shaft 158A into and out of the nut member 161A, the first regulating shaft 158A advances and retreats relative to the abutting member 159, and by screwing the second regulating shaft 158B into and out of the nut member 161B, the second regulating shaft 158B advances and retreats relative to the abutting member 159. This makes it possible to adjust the amount of operation of the dozer lever 80 from the neutral position. The first regulating shaft 158A and the second regulating shaft 158B are inserted into the insertion hole 160 so as not to protrude downward from the insertion hole 160, and their upper portions protrude upward from the nut members 161A and 161B.

[0087] As shown in FIG. 26, the abutment member 159 is formed of a plate material and is disposed above the rotating shaft 134 and the support piece 157 with the plate surface facing the up-down direction. The abutment member 159 is disposed facing the support piece 157 (first support piece 157A, second support piece 157B). The abutment member 159 has a first regulating portion 159A with which the first regulating shaft 158A abuts when the dozer lever 80 is operated from the neutral position to one side, and a second regulating portion 159B with which the second regulating shaft 158B abuts when the dozer lever 80 is operated from the neutral position to the other side. The first regulating portion 159A and the second regulating portion 159B are formed by being recessed upward from the lower surface of the abutment member 159. This allows the distance between the rotating shaft 134 and the abutment member 159 to be reduced.

[0088] In the above-mentioned swing restriction mechanism 137, the first support piece 157A protrudes from the pivot shaft 134 to one side (front side) in the second horizontal direction 139, and the second support piece 157B protrudes from the pivot shaft 134 to the other side (rear side) in the second horizontal direction 139. A contact member 159 made of a plate material is arranged above the first support piece 157A and the second support piece 157B with the plate surface facing upward and downward, thereby making it possible to reduce the thickness in the vertical direction.

[0089] In addition, in the above-described steering mechanism 131, the operation support mechanism 133 is configured to have a thin thickness in the vertical direction, so that it is possible to effectively use the space below the operation support mechanism 133. For example, as shown in Fig. 27, it is possible to pass a duct 66C branching off from the duct 66B below the second armrest 93R. Furthermore, the operating mechanism 131 is not limited to a mechanism for operating the dozer device 7, and the operating member may be, for example, a travel pedal, a swing operating member for operating a swing bracket, or an AUX pedal for operating an attachment attached instead of or together with the bucket.

[0090] In addition, the control mechanism 131 is not limited to being provided on the control stand 81 arranged in front of the driver's seat 6, but may be attached to the control stand 81 arranged to the side of the driver's seat 6, or may be provided on the floor portion constituting the upper surface of the aircraft. In addition, since the control mechanism 131 has no parts protruding below the rotating shaft 134, interference with members arranged below the rotating shaft 134 can be avoided.

[0091] The work machine 1 of this embodiment comprises a machine body 2, a driver's seat 6 mounted on the machine body 2, and a control stand 81 provided in front of the driver's seat 6 on the machine body 2 and equipped with a control member 82 that is gripped and operated, the control stand 81 including an armrest (first armrest 93L) extending rearward from the control stand 81 side, the armrest 93L being configured to be switchable between a first position 98 that prevents the driver from getting on and off the driver's seat 6 and a second position 99 that allows the driver to get on and off the driver's seat 6, and in the first position 98, operation of an object operated by the control member 82 is permitted, and in the second position 99, operation of the object is prevented.

[0092] According to this configuration, by providing the armrest 93L with the function of permitting and preventing the operation of an object operated by the operating member 82, it is possible to simplify the structure and reduce costs. In addition, the control platform 81 has a base 86 erected on the aircraft body 2 and a control platform main body 87 arranged on the top of the base 86, and the control platform main body 87 includes a mounting portion 92 attached to the base 86, and an armrest 93L, and the armrest 93L has an armrest base 93L1 provided on the side of the mounting portion 92, and an armrest main body 93L2 pivotally supported on the armrest base 93L1, and the armrest main body 93L2 is movable between a lowered position 100 extending rearward from the armrest base 93L1 and forming a first position 98, and a raised position 101 rotated upward from the lowered position 100 and forming a second position 99.

[0093] According to this configuration, by rotating the armrest main body 93L2 from the lowered position 100 to the raised position 101, the armrest 93L can be easily switched between the first position 98 and the second position 99. In addition, a detection switch 102 is provided to detect the position of the armrest main body 93L2. According to this configuration, the first attitude 98 and the second attitude 99 can be detected.

[0094] It also has a damper 122 that is provided on one side of the armrest base 93L1 or the armrest main body 93L2 and abuts against the other side of the armrest base 93L1 or the armrest main body 93L2 to reduce the impact when the armrest main body 93L2 is rotated from the raised position 101 to the lowered position 100. According to this configuration, even if the armrest main body 93L2 is roughly lowered, it is possible to prevent loud noises and vibrations from occurring, and it is also possible to improve comfort.

[0095] In addition, a holding mechanism 108 for holding the armrest main body 93L2 in the lowered position 100 and the raised position 101 is provided. According to this configuration, the armrest main body 93L2 can be held in the lowered position 100 and the raised position 101. It also comprises a fixed side member 104 attached to the armrest base 93L1, and a shaft 106 supported by the fixed side member 104 and rotating integrally with the armrest main body 93L2, the fixed side member 104 having a first support portion 104B1 supporting one axial end side of the shaft 106 and a second support portion 104B2 supporting the other axial end side of the shaft 106, and the retaining mechanism 108 incorporated between the first support portion 104B1 and the second support portion 104B2.

[0096] According to this configuration, the rotation mechanism that rotatably supports the armrest main body 93L2 and the holding mechanism 108 can be configured compactly. The holding mechanism 108 also has a first member (first cam 126) attached to the fixed side member 104, a second member (second cam 127) supported on the shaft 106 so as to be rotatable integrally with the shaft 106 and so as to be freely slidable in the axial direction, and a spring member 128 that presses the second member 127 against the first member 126.

[0097] According to this configuration, the holding mechanism 108 can be assembled onto the shaft 106 in a compact manner. In addition, the retaining mechanism 108 has a cam protrusion 129 provided on one side of the first member 126 or the second member 127, and a cam slope 130 provided on the other side of the first member 126 or the second member 127 and abutting the cam protrusion 129. The cam protrusion 129 and the cam slope 130 abut against each other, and apply the biasing force of the spring member 128 to rotate the armrest main body 93L2 from a midway position between the lowered position 100 and the raised position 101 on the lowered position 100 side to the lowered position 100, and to rotate the armrest main body 93L2 from the midway position to the raised position 101 side to the raised position 101.

[0098] According to this configuration, the rotational movement of the armrest main body 93L2 can be assisted. In addition, when the armrest main body 93L2 is in the raised position 101, the retaining mechanism 108 applies the biasing force of the spring member 128 in a direction to rotate the armrest main body 93L2 from the lowered position 100 to the raised position 101 by abutting the cam protrusion 129 and the cam inclined surface 130.

[0099] According to this configuration, the raised position 101 of the armrest main body 93L2 can be securely maintained. It also includes a damper 122 which is provided on one side of the armrest base 93L1 or the armrest main body 93L2 and abuts against the other side of the armrest base 93L1 or the armrest main body 93L2 to reduce the impact when the armrest main body 93L2 rotates from the raised position 101 to the lowered position 100, and a movable side member 107 which rotates integrally with the shaft 106 and is attached to the armrest main body 93L2, the damper 122 being provided on the armrest base 93L1, and the movable side member 107 having a damper abutment portion (first abutment portion 120) which abuts against the damper 122.

[0100] According to this configuration, by providing the damper abutment portion 120 that abuts against the damper 122 on the movable member 107, it is possible to reduce the number of parts and simplify the structure. In addition, the work machine 1 of this embodiment comprises a machine body 2, a driver's seat 6 mounted on the machine body 2, a control platform 81 provided in front of the driver's seat 6, a swingable operating member (dozer lever 80) arranged on the control platform 81, and an operation support mechanism 133 that supports the operating member 80, and the control platform 81 includes a hollow armrest (second armrest 93R) extending rearward from the control platform 81 side, and the operation support mechanism 133 has a neutral return mechanism 136 that returns the operating member 80 from the operating position where it was operated to a neutral position, and a swing restriction mechanism 137 that restricts the amount of operation of the operating member 80 from the neutral position, and is housed within the hollow interior of the armrest 93R.

[0101] According to this configuration, by accommodating an operation support mechanism 133 equipped with a neutral return mechanism 136 and a swing restriction mechanism 137 inside the hollow interior of the armrest 93R, it is possible to prevent the operation support mechanism 133 supporting the operating member 80 from protruding below the armrest 93R. In addition, the operation support mechanism 133 has a rotating shaft 134 that rotates around its axis by swinging operation of the operating member 80, and an axis support member 135 that supports the rotating shaft 134 so that it can rotate around its axis, and the rotating shaft 134 is arranged below the upper wall 96 of the armrest 93R and is arranged to protrude in the body width direction K2 from one end side of the armrest 93R in the body width direction K2.

[0102] According to this configuration, the operating member 80, which is operated in the front-rear direction by the rotating shaft 134, can be supported with a simple structure. In addition, the neutral return mechanism 136 has a spring device 144 arranged between the upper wall 96 and the pivot shaft 134, the spring device 144 having a neutral return spring 148 that returns the operating member 80 to the neutral position, and a bracket member 145 that supports the spring device 144 and is attached to the upper wall 96, and a bracket mounting portion 156 on the upper wall 96 to which the bracket member 145 is attached is formed so as to be recessed from below to above.

[0103] According to this configuration, the height of the lower surface of the armrest 93R can be increased, and the space below the armrest 93R can be made larger. Moreover, the swing restriction mechanism 137 is arranged alongside the neutral return mechanism 136 along the rotation shaft 134 . According to this configuration, by arranging the neutral return mechanism 136 and the swing restriction mechanism 137 side by side, the operation support mechanism 133 can be configured compactly.

[0104] In addition, the swing restriction mechanism 137 has a support piece 157 fixed to the rotating shaft 134, an abutment member 159 facing the support piece 157, and a restriction shaft 158 ​​attached to the support piece 157 so as to be movable forward and backward relative to the abutment member 159, and which restricts the swing of the operating member 80 by abutting against the abutment member 159 when the operating member 80 is swung from the neutral position. According to this configuration, the amount of operation of the operating member 80 from the neutral position can be adjusted.

[0105] In addition, the support piece 157 includes a first support piece 157A protruding forward from the pivot shaft 134 and a second support piece 157B protruding rearward from the pivot shaft 134, the regulating shaft 158 ​​includes a first regulating shaft 158A attached to the first support piece 157A and a second regulating shaft 158B attached to the second support piece 157B, the abutment member 159 is disposed above the pivot shaft 134 and has a first regulating portion 159A with which the first regulating shaft 158A abuts when the operating member 80 is operated in one direction from the neutral position, and a second regulating portion 159B with which the second regulating shaft 158B abuts when the operating member 80 is operated in the other direction from the neutral position, and the first regulating portion 159A and the second regulating portion 159B are formed by being recessed upward from the lower surface of the abutment member 159.

[0106] According to this configuration, the distance between the rotation shaft 134 and the abutment member 159 can be made small. In addition, the control console 81 has a base 86 erected on the aircraft body 2 and a control console main body 87 arranged on the top of the base 86, and the control console main body 87 includes a mounting portion 92 attached to the base 86 and an armrest 93R, and the armrest 93R has an armrest base 93R1 provided on the side of the mounting portion 92 and an armrest main body 93R2 extending from the armrest base 93R1 towards the driver's seat 6, and the operating member 80 is arranged on the opposite side of the mounting portion 92 on the armrest base 93R1, and the operating support mechanism 133 is housed in the armrest base 93R1.

[0107] According to this configuration, the operation support mechanism 133 that supports the operating member 80 disposed on the opposite side of the armrest base portion 93R1 to the attachment portion 92 can be well accommodated in the armrest 93R. In addition, an angle sensor 132 that detects the operation direction and the operation amount of the operating member 80 is provided, and the angle sensor 132 is accommodated in the mounting portion 92.

[0108] By housing the angle sensor 132 in the mounting portion 92, it is possible to prevent the occurrence of a portion protruding downward from the lower surface of the armrest 93R. In addition, the steering mechanism 131 of this embodiment includes a rotating shaft 134 that can rotate around an axis extending in a first horizontal direction 138, an operating member (dozer lever 80) that is arranged on one end side of the axial direction of the rotating shaft 134 and rotates integrally with the rotating shaft 134, an angle sensor 132 that is arranged on the other end side of the axial direction of the rotating shaft 134 and detects the rotation angle of the rotating shaft 134, and a neutral return mechanism 136 that returns the operating member 80 from an operating position where it was operated to a neutral position, the neutral return mechanism 136 being provided between the operating member 80 and the angle sensor 132.

[0109] According to this configuration, it is possible to reduce the thickness in the vertical direction of the steering mechanism 131. As a result, the space below the steering mechanism 131 can be effectively utilized. The neutral return mechanism 136 also has an interlocking shaft 146 arranged above the pivot shaft 134 along a second horizontal direction 139 intersecting the first horizontal direction 138, an interlocking arm 143 to which one end of the interlocking shaft 146 is pivotally connected and which is provided on the pivot shaft 134 so as to protrude upward, and a neutral return spring 148 formed of a coil spring fitted onto the other end of the interlocking shaft 146 and which urges the interlocking shaft 146 to return the operating member 80 to the neutral position.

[0110] According to this configuration, the thickness of the steering mechanism 131 in the vertical direction can be further reduced. The neutral return mechanism 136 also has a bracket member 145 arranged above the rotating shaft 134 and pivotally supporting the other end of the interlocking shaft 146 and a housing member 147 that houses a neutral return spring 148.

[0111] According to this configuration, the neutral return mechanism 136 can be positioned above the pivot shaft 134, thereby eliminating parts that protrude below the pivot member and avoiding interference with parts positioned below the pivot shaft 134. In addition, a swing restriction mechanism 137 that restricts the amount of operation of the operating member 80 from the neutral position is provided, and the swing restriction mechanism 137 is arranged in line with the neutral return mechanism 136 along the rotation axis 134 between the operating member 80 and the angle sensor 132.

[0112] According to this configuration, by arranging the neutral return mechanism 136 and the swing restriction mechanism 137 side by side, the thickness of the steering mechanism 131 in the up-down direction can be reduced. In addition, the swing restriction mechanism 137 has a support piece 157 protruding from the pivot shaft 134 in the second horizontal direction 139, a restriction shaft 158 ​​attached to the support piece 157, and an abutment member 159 that is disposed above the pivot shaft 134 and restricts the swing of the operating member 80 by abutting the restriction shaft 158 ​​when the operating member 80 is operated from the neutral position to an operating position.

[0113] According to this configuration, the rocking restriction mechanism 137 can be positioned above the pivot shaft 134, thereby eliminating any parts that protrude below the pivot member and avoiding interference with parts positioned below the pivot shaft 134. In addition, the support piece 157 includes a first support piece 157A protruding from the pivot shaft 134 to one side in the second horizontal direction 139, and a second support piece 157B protruding from the pivot shaft 134 to the other side in the second horizontal direction 139, and the regulating shaft 158 ​​has a first regulating shaft 158A attached to the first support piece 157A and abutting against the abutment member 159 when the operating member 80 is operated from the neutral position to one side, and a second regulating shaft 158B attached to the second support piece 157B and abutting against the abutment member 159 when the operating member 80 is operated from the neutral position to the other side, and the first regulating shaft 158A and the second regulating shaft 158B are attached so as to be able to move forward and backward relative to the abutment member 159.

[0114] According to this configuration, the thickness of the steering mechanism 131 in the vertical direction can be reduced. In addition, the abutment member 159 has a first regulating portion 159A against which the first regulating shaft 158A abuts, and a second regulating portion 159B against which the second regulating shaft 158B abuts, and the first regulating portion 159A and the second regulating portion 159B are formed by being recessed upward from the lower surface of the abutment member 159. According to this configuration, the distance between the rotating shaft 134 and the abutting member 159 can be made small, and the thickness of the steering mechanism 131 in the vertical direction can be made thin.

[0115] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0116] 2. Aircraft 6 Driver's seat 81 Pilot Station 80 Operation member (dozer lever) 86 Foundation 87 Control platform body 92 Mounting part 93R Armrest (2nd Armrest) 93R1 Armrest base 93R2 Armrest body 96 Upper Wall 132 Angle Sensor 133 Operation support mechanism 134 Rotating shaft 135 Shaft support member 136 Neutral return mechanism 137 Swing Control Mechanism 144 Spring device 145 Bracket member 148 Neutral return spring 156 Bracket mounting part 157 Support piece 157A 1st support piece 157B 2nd support piece 158 Regulatory Axis 158A First Regulating Axis 158B Second Regulating Axis 159 Contact member 159A First Regulatory Section 159B Second Regulatory Section K2 Machine width direction

Claims

1. The aircraft and A driver's seat mounted on the aircraft; A control console provided in front of the driver's seat; An operating member that is arranged on the control console and can be operated by swinging; an operation support mechanism for supporting the operation member; An angle sensor for detecting an operation direction and an operation amount of the operation member; Equipped with The control console includes a base provided upright on the aircraft body, a hollow mounting portion attached to the base, and a hollow armrest provided to a side of the mounting portion and extending rearward from the control console side, The operating member is disposed on the armrest on an opposite side to the mounting portion, the operation support mechanism includes a neutral return mechanism that returns the operating member from an operating position to a neutral position, a swing restriction mechanism that restricts an amount of operation of the operating member from the neutral position, a rotating shaft that rotates about an axis by swinging the operating member, and a shaft support member that supports the rotating shaft so that the rotating shaft can rotate about the axis, and is accommodated in a hollow interior of the armrest; The pivot shaft is disposed to extend in the width direction of the aircraft body, and one end side of the pivot shaft protrudes from the armrest to the opposite side to the mounting portion, The operating member is fixed to the one end side of the rotating shaft, The angle sensor is housed inside the mounting portion and engaged with the other end side of the rotating shaft in the machine body width direction.

2. The work machine according to claim 1 , wherein the rotation shaft is disposed below an upper wall of the armrest.

3. the neutral return mechanism includes a spring device disposed between the upper wall and the pivot shaft, the spring device having a neutral return spring that returns the operating member to a neutral position, and a bracket member that supports the spring device and is attached to the upper wall, 3. The work machine according to claim 2, wherein the bracket attachment portion on the upper wall to which the bracket member is attached is formed by being recessed from below to above.

4. 4. The work machine according to claim 2, wherein the swing restriction mechanism is arranged next to the neutral return mechanism along the rotation shaft.

5. The aircraft and A driver's seat mounted on the aircraft; A control console provided in front of the driver's seat; An operating member that is arranged on the control console and can be operated by swinging; an operation support mechanism for supporting the operation member; Equipped with The control console includes a hollow armrest extending rearward from the control console side, The operation support mechanism includes a neutral return mechanism that returns the operating member to a neutral position from an operating position to which the operating member is operated, and a swing restriction mechanism that restricts an amount of operation of the operating member from the neutral position, and is housed in a hollow interior of the armrest. The operation support mechanism includes a rotation shaft that rotates about an axis by a swing operation of the operation member, and a shaft support member that supports the rotation shaft so as to be rotatable about the axis, The pivot shaft is disposed below the upper wall of the armrest and protrudes in the aircraft width direction from one end side of the armrest in the aircraft width direction, The swing restriction mechanism is a work machine having a support piece fixed to the rotating shaft, a contact member facing the support piece, and a restriction shaft attached to the support piece so as to be movable toward and away from the contact member, and which restricts the swing of the operating member by abutting against the contact member when the operating member is swung from a neutral position.

6. The support piece includes a first support piece that protrudes forward from the pivot shaft and a second support piece that protrudes rearward from the pivot shaft, the regulating shaft includes a first regulating shaft attached to the first support piece and a second regulating shaft attached to the second support piece, the abutment member is disposed above the rotation shaft and has a first restricting portion with which the first restricting shaft abuts when the operating member is operated from a neutral position to one side, and a second restricting portion with which the second restricting shaft abuts when the operating member is operated from the neutral position to the other side, The work machine according to claim 5 , wherein the first restriction portion and the second restriction portion are recessed upward from a lower surface of the contact member.

7. The armrest has an armrest base provided on a side of the mounting portion and an armrest main body extending from the armrest base toward the driver's seat, The operating member is disposed on the armrest base on an opposite side to the mounting portion, The work machine according to any one of claims 1 to 4, wherein the operation support mechanism is housed in the armrest base.

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