JP7326244B2 - work machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a work machine such as a backhoe, and more particularly to the structure of a lock mechanism provided in the work machine.

2. Description of the Related Art Conventionally, a work machine is known that has a lock mechanism that locks or unlocks (unlocks) movement of an operating member.
For example, in the work machine disclosed in Patent Document 1, a control stand is provided in front of the driver's seat on the machine body. The control table is provided with an operation member for operating the travel device, an operation support shaft for supporting the operation member, a lock mechanism, and a lock lever for operating the lock mechanism. The lock mechanism includes an engaging portion that rotates integrally with the operating member, and an engaged portion that restricts movement of the operating member by engaging with the engaging portion and permits movement of the operating member by disengaging from the engaging portion. It is composed of a lock body having a portion (lock pin), a lock support shaft that supports the lock body, and an interlocking mechanism that interlocks the lock lever and the lock body.

JP 2018-199917 A

However, in the technique disclosed in Patent Document 1, the lock body is supported in a cantilever manner by the lock support shaft, and the engaged portion is provided at the free end of the lock body. For this reason, the relative position and relative angle of the engaged portion to the engaging portion are likely to shift, and there is a risk that the locking and unlocking of the movement of the operating member by the lock mechanism cannot be properly performed.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a work machine capable of improving the operational accuracy of a lock mechanism that locks or unlocks the movement of an operating member.

A work machine according to an aspect of the present invention includes a machine body, a driver's seat provided in the machine body, and a control stand provided in front of the driver's seat, and the control board extends in a width direction of the machine body. a support shaft; an operation member supported rotatably relative to the operation support shaft around the axis of the operation support shaft; a locked state that restricts the movement of the operation member; and an unlocked state that allows the movement of the operation member. a lock mechanism capable of switching to and from the operating member, the lock mechanism comprising an engaging portion that rotates integrally with the operating member; and a locking body having an engaged portion that engages with the engaging portion , a lock support shaft that rotatably supports one end of the lock body; and a drive part that applies a driving force to the other end of the lock body, and the engaged parts are the one end and the other end of the lock body. The lock body is provided at an intermediate portion between the portion and the portion to be engaged. and a disengagement position where the engaged portion is disengaged from the engaging portion.

According to the above configuration, it is possible to provide a work machine capable of improving the operation accuracy of the lock mechanism that locks or unlocks the movement of the operating member.

It is the perspective view which looked at the upper part of the control stand from the back. It is a rear view of the internal structure of a control stand. It is the perspective view which looked at the upper part of the internal structure of the control stand from the back. It is a front view of the upper part of the internal structure of a control stand. It is the perspective view which looked at the upper part of the internal structure of the control stand from the front. It is the perspective view which looked at the upper part of the support frame from the back. FIG. 4 is a cross-sectional view of the locking mechanism in a locked state; FIG. 4 is a cross-sectional view of the lock mechanism in an unlocked state; It is a cross-sectional view of a locked state of the lock mechanism of the modification. It is a cross-sectional view of the unlocked state of the lock mechanism of the modification. It is a schematic diagram of the internal structure of an airframe, an electric circuit, and a flow path. It is the perspective view which looked at the vicinity of the hydraulic oil tank from the front. FIG. 4 is a plan view of the vicinity of the hydraulic oil tank; It is a rear view near a hydraulic oil tank. It is the figure which looked at the vicinity of the attachment member from the front. It is the figure which looked at the vicinity of the attachment member of another example from the front. It is a front view of an attachment member. It is a top view of an attachment member. It is a rear view of an attachment member. It is a side view of a working machine. It is a front view of a working machine. It is a side view of the upper part of a working machine. It is a top view of the upper part of a working machine.

An embodiment of the present invention will be described below with appropriate reference to the drawings.
First, the overall configuration of the working machine 1 according to this embodiment will be described.
FIG. 17 is a schematic side view showing the overall configuration of work machine 1. As shown in FIG. FIG. 18 is a schematic front view of the working machine 1. FIG. FIG. 19 is a schematic side view of the upper portion of work implement 1. FIG. FIG. 20 is a schematic plan view of the upper portion of work machine 1. FIG. In this embodiment, a backhoe, which is a turning work machine, is exemplified as the work machine 1 .

As shown in FIG. 17, the working machine 1 includes a machine body (swivel base) 2, a traveling device 3, a working device 4, and the like. A driver's seat 6 on which a driver (operator) D (see FIGS. 19 and 20) sits is mounted on the aircraft 2 .
In this embodiment, the front side of the driver D seated in the driver's seat 6 of the working machine 1 (direction of arrow A1 in FIGS. 17 and 19) is forward, and the rear side of the driver D (direction of arrow A2 in FIGS. 17 and 19) 18 and 20) is the left side, and the right side of the driver D (the arrow B2 direction in FIGS. 18 and 20) is the right side.

Also, the horizontal direction, which is the direction perpendicular to the front-rear direction K1, will be described as the body width direction (left and right width direction of the body 2) K2 (see FIGS. 18 and 20). Further, the direction from the center of the airframe 2 to the right or left will be described as the outer side of the airframe. In other words, the outer side of the fuselage is the width direction K2 of the fuselage, which is the direction away from the center of the fuselage 2 to the left or right side. The direction opposite to the outer side of the fuselage will be described as the inner side of the fuselage. In other words, the inward direction of the fuselage is the fuselage width direction K2, which is the direction from the left or right of the fuselage 2 toward the center.

As shown in FIGS. 17 and 18, the travel device 3 is a device that supports the body 2 so that it can travel. The traveling device 3 has 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 (FIG. 18) provided on the right side of the traveling frame 3A. The first travel device 3L and the second travel device 3R are crawler travel devices. The first travel device 3L is driven by a first travel motor (travel motor) M1. The second travel device 3R is driven by a second travel motor (travel motor) M2. The first traveling motor M1 and the second traveling motor M2 are configured by hydraulic motors (hydraulic actuators).

As shown in FIG. 17, a dozer device 7 is attached to the front portion of the traveling device 3 . The dozer device 7 can be moved up and down (raise and lower the blade) by extending and contracting the dozer cylinder C1 (hydraulic actuator).
The machine body 2 is supported on the traveling frame 3A via a turning bearing 8 so as to be able to turn about a vertical axis (an axis extending in the vertical direction). The body 2 is driven in a turning direction by a turning motor M3, which is a hydraulic motor (hydraulic actuator). The fuselage 2 has a base plate (hereinafter referred to as a swing base plate) 9 that turns about its vertical axis, and a weight 10 . The swivel base plate 9 is made of a steel plate or the like, and is connected to the swivel bearing 8 . A weight 10 is provided at the rear portion of the airframe 2 .

A prime mover Eg is mounted on the rear portion of the airframe 2 . Prime mover Eg is a diesel engine. The prime mover Eg may be a gasoline engine, an LPG engine, an electric motor, or the like, or may be a hybrid prime mover having an engine and an electric motor.
The prime mover Eg is covered by a bonnet 5 . A driver's seat 6 is provided on the bonnet 5 .

As shown in FIG. 20 , the center of the driver's seat 6 in the body width direction K2 and the center of the bonnet 5 in the body width direction K2 substantially match. Both sides (left and right sides) of the bonnet 5 in the machine width direction K2 protrude from the driver's seat 6 to the outside of the machine body.
A support bracket 13 is provided at the front of the body 2 . The support bracket 13 is installed slightly to the right of the center in the body width direction K2.

As shown in FIG. 17, a swing bracket 14 is attached to the support bracket 13 so as to be able to swing about the vertical axis. A working device 4 is attached to the swing bracket 14 . That is, the work device 4 is supported on the front portion of the machine body 2 .
18 also shows the working device 4, but for the sake of convenience, the positions of the parts of the working device 4 in the height direction are different between FIG. 18 and FIG.

As shown in FIG. 17 , the work device 4 has a boom 15 , an arm 16 and a bucket (work implement) 17 . The base of the boom 15 is pivotally attached to the swing bracket 14 so as to be rotatable about a horizontal axis (an axis extending in the machine width direction K2). This allows the boom 15 to swing up and down. The arm 16 is pivotally attached to the tip side of the boom 15 so as to be rotatable about the horizontal axis. This allows the arm 16 to swing back and forth or up and down.

The bucket 17 is provided on the tip side of the arm 16 so as to be able to scoop and dump. Instead of or in addition to the bucket 17, the work machine 1 can be equipped with other work implements (hydraulic attachments) that can be driven by hydraulic actuators. Other working tools include hydraulic breakers, hydraulic crushers, angle blooms, earth augers, pallet forks, sweepers, mowers, snow blowers, and the like.

The swing bracket 14 is swingable by extension and contraction of a swing cylinder C2 provided inside the body 2 . The boom 15 is swingable by extension and contraction of the boom cylinder C3. The arm 16 is swingable by extension and contraction of the arm cylinder C4. The bucket 17 can perform squeezing and dumping operations by expanding and contracting a bucket cylinder (working tool cylinder) C5.

The dozer cylinder C1, swing cylinder C2, boom cylinder C3, arm cylinder C4, and bucket cylinder C5 are configured by hydraulic cylinders (hydraulic actuators). A boom cylinder C3, an arm cylinder C4, and a bucket cylinder C5 are working hydraulic actuators that drive the working device 4. As shown in FIG.
The work machine 1 includes a control device 21 for manipulating the work machine 1 . The control device 21 has a control platform 23 . The control table 23 is provided behind the work device 4 and in front of the driver's seat 6 and the bonnet 5 on the machine body 2 .

A passageway 22 is provided between the control platform 23 and the driver's seat 6 and the bonnet 5 . The passages 22 are formed at predetermined intervals on the floor 24 between the control platform 23 and the bonnet 5 . In addition, the passage 22 is open to the left and right of the body 2 and can be passed through (walk-through) in the body width direction K2. Therefore, the driver D can get on and off the work machine 1 from either the left or right side of the work machine 1 via the aisle 22, and can sit on and leave the driver's seat 6. seats are available.

The control platform 23 has a cover 26 . The cover 26 has a first cover 26F provided on the working device 4 side (front A1 side) and a second cover 26B provided on the driver's seat 6 side (rear A2 side).
FIG. 1 is a perspective view of the upper portion of the control table 23 as seen from the rear (driver's seat 6 side in FIGS. 17 to 20). FIG. 2 is a rear view of the internal structure of the cockpit 23 (viewed from the driver's seat 6 side in FIGS. 17 to 20). Although FIG. 1 shows both the first cover 26F and the second cover 26B, FIG. 2 shows a state in which the second cover 26B is removed.

As shown in FIGS. 1 and 17, the first cover 26F and the second cover 26B are combined in the front-rear direction K1 to form a housing of the control platform 23. As shown in FIGS. The cover 26 covers the internal structure of the control stand 23 as shown in FIG.
As shown in FIG. 2 , the internal structure of the control platform 23 includes a support frame 25 that serves as the skeleton of the control platform 23 . The first cover 26F and the second cover 26B are fixed to the support frame 25 by fastening members (not shown) such as bolts and nuts.

As shown in FIG. 1, a rear surface 26a of a second cover 26B of the control platform 23 is provided with a plurality of windows 26c and 26d. Each window 26c, 26d is a through hole of a predetermined size. The windows 26c and 26d are provided with lids 26g and 26h that can be opened and closed with a hinge structure. FIG. 1 shows a state in which the lid 26g is opened to open the window 26c and a state in which the lid 26h is closed to close the window 26d. As shown in FIG. 1, by opening the window 26c, a part or all of the lock mechanism 114, which will be described later, can be exposed.

Electrical components 18s such as various warning lamps are provided on the rear surface 26a of the second cover 26B.
As shown in FIGS. 17 and 18 , a protective member (ROPS) 19 is attached to the control stand 23 . The protection member 19 protects the driver D seated in the driver's seat 6 . The protective member 19 has a mounting portion 19A, vertical portions 19L and 19R, horizontal portions 19B and 19C, and connecting portions 19D and 19E. 19 and 20, illustration of the protection member 19 is omitted for the sake of convenience.

As shown in FIG. 18, the mounting portion 19A is arranged over the front A1 and left and right sides of the first cover 26F. A support plate 20L is interposed between the left side portion 19g of the mounting portion 19A and the left side wall 26L of the first cover 26F. A support plate 20R is interposed between the right side portion 19h of the mounting portion 19A and the right side wall 26R of the first cover 26F. Each support plate 20</b>L, 20</b>R is erected on the fuselage 2 .

A left side portion 19g of the attachment portion 19A is fixed to the support plate 20L and the first longitudinal member 27 (FIG. 2) of the support frame 25 by a fastening member 200. As shown in FIG. A right side portion 19h of the mounting portion 19A is fixed to the support plate 20R and the second longitudinal member 28 (see FIG. 2) of the support frame 25 by a fastening member 200. As shown in FIG. Each fastening member 200 penetrates both side walls 26L and 26R of the first cover 26F. The side walls 26L, 26R of the first cover 26F may or may not be fixed to the side portions 19g, 19h of the mounting portion 19A and the support plates 20L, 20R.

As shown in FIGS. 17 and 18, vertical portions 19L and 19R extend upward from both side portions 19g and 19h of the attachment portion 19A. Horizontal portions 19B and 19C extend from upper ends of the vertical portions 19L and 19R toward the rear A2. Rear ends of the lateral portions 19B and 19C are connected to each other by a connecting portion 19D extending in the body width direction K2. The vertical portions 19L and 19R are connected to each other by a connecting portion 19E extending in the body width direction K2.

The mounting portion 19A is arranged in front A1 of the first cover 26F, but not in rear A2 of the second cover 26B. Therefore, as shown in FIGS. 17 and 18, with the protective member 19 attached, the second cover 26B can be removed, but the first cover 26A cannot be removed.
Next, the configuration and structure of the control device 21 will be described.

FIG. 3 is a perspective view of the upper portion of the internal structure of the control stand 23 as seen from the rear (driver's seat 6 side). FIG. 4 is a front view of the upper portion of the internal structure of the cockpit 23. As shown in FIG. FIG. 5 is a perspective view of the upper part of the internal structure of the control stand 23 as seen from the front of the machine body 2 (from the side of the work device 4). FIG. 6 is a perspective view of the upper part of the support frame 25 as seen from the rear.
As shown in FIGS. 2 to 6, the support frame 25 of the control platform 23 includes a first vertical member 27 forming the left portion, a second vertical member 28 forming the right portion, and these vertical members 27, 28. It has a connector 29 that connects the . The first vertical member 27 and the second vertical member 28 are formed in a plate shape. The first vertical member 27 and the second vertical member 28 are erected on the fuselage 2 with their respective plate surfaces facing the fuselage width direction K2. Also, the first vertical member 27 and the second vertical member 28 face each other with a predetermined gap in the body width direction K2.

The connecting body 29 is provided between the upper portions of the first vertical member 27 and the second vertical member 28 . The connecting body 29 has a first connecting member 30 , a second connecting member 31 and a third connecting member 32 .
The first connecting member 30 is connected to the upper portion of the first longitudinal member 27 . The second connecting member 31 is connected to the upper portion of the second longitudinal member 28 . The first connecting member 30 and the second connecting member 31 are spaced apart in the body width direction K2. The third connecting member 32 connects the first connecting member 30 and the second connecting member 31 .

As shown in FIG. 6 and the like, the first connecting member 30 is arranged on the second vertical member 28 side with respect to the first vertical member 27 and connected to the first vertical member 27 . The first connecting member 30 has a first wall 30a and a second wall 30b. The first wall 30 a is fixed along the first longitudinal member 27 . A first bushing 69L is arranged below the first wall 30a. The first bushing 69L is provided through the first vertical member 27 and has an axial center extending in the machine width direction K2.

The second wall 30b extends inward from the front end of the first wall 30a. The second wall 30b is provided with a first support tube 68L penetrating therethrough. The first support tube 68L has an axial center extending in the front-rear direction K1.
The second connecting member 31 is arranged on the first vertical member 27 side with respect to the second vertical member 28 and connected to the second vertical member 28 . The second connecting member 31 has a first wall 31a and a second wall 31b. The first wall 31 a is fixed along the second longitudinal member 28 . As shown in FIGS. 4 and 5, a second bushing 69R is arranged below the first wall 31a. The second bushing 69R is provided through the second longitudinal member 28 and has an axial center extending in the machine width direction K2.

The second wall 31b extends inward from the front end of the first wall 31a. A second support cylinder 68R is provided to penetrate the second wall 31b. The second support cylinder 68R has an axial center extending in the front-rear direction K1.
As shown in FIG. 6, the third connecting member 32 has a first wall portion 32a, a second wall portion 32b, and a lower base portion 32c behind the first connecting member 30 and the second connecting member 31 (on the side of the driver's seat 6). and The first wall portion 32a is fixed to the second wall 30b of the first connecting member 30 so as to protrude rearward from the rear surface of the right end portion thereof. The second wall portion 32b is fixed so as to protrude rearward from the rear surface of the left end portion of the second wall 31b of the second connecting member 31 . The first wall portion 32 a and the second wall portion 32 b protrude downward from the first connecting member 30 and the second connecting member 31 . The lower base portion 32c connects the lower end portion of the first wall portion 32a and the lower end portion of the second wall portion 32b. The lower base portion 32c has a plate-like shape, and each plate surface faces upward or downward.

In addition, as shown in FIG. 4, the third connecting member 32 is arranged in front of the first connecting member 30 and the second connecting member 31 (on the work device 4 side), and in front of the third wall portion 32d and the fourth wall portion 32e. and a base portion 32f. The third wall portion 32d is fixed to project forward from the front surface of the second wall 30b of the first connecting member 30 . The fourth wall portion 32e is fixed so as to protrude forward from the front surface of the second wall 31b of the second connecting member 31 . The front base portion 32f connects the front end portion of the third wall portion 32d and the front end portion of the fourth wall portion 32e. The front base portion 32f has a plate shape, and each plate surface faces forward or backward. In addition, in FIG. 5, illustration of the 3rd wall part 32d, the 4th wall part 32e, and the front base part 32f is abbreviate|omitted for convenience.

The third wall portion 32d, the fourth wall portion 32e, and the front base portion 32f are separated from the first wall portion 32a, the second wall portion 32b, and the lower base portion 32c of the third connecting member 32. As shown in FIG. However, in order to improve the rigidity of the third connecting member 32 and the support frame 25, the wall portions 32a, 32b, 32d, 32e and 32f of the third connecting member 32 and the base portions 32c and 32f may be integrated.
An operation support shaft 34 is provided on the upper portion of the support frame 25 . The operation support shaft 34 has an axial center extending in the body width direction K2. The operation support shaft 34 is supported by the support frame 25 so as to be rotatable about its axis. Further, the operation support shaft 34 is positioned above the lower base portion 32c of the third connecting member 32. As shown in FIG.

Base plates 53L and 53R are connected to both ends of the operation support shaft 34, respectively. As shown in FIG. 17, the base plate 53L on the left side is arranged closer to the second cover 26B than the base portion 19t of the vertical portion 19L connected to the attachment portion 19A of the protective member 19. As shown in FIG. Similarly, the base plate 53R on the right side is arranged closer to the second cover 26B than the base portion 19t of the vertical portion 19R (not shown). Therefore, the operation support shaft 34 is also arranged closer to the second cover 26B than the base portions 19t of the vertical portions 19L and 19R.

As shown in FIG. 4, the operation support shaft 34 has a first shaft 34A and a second shaft 34B. The first shaft 34A is inserted through the first bushing 69L and extends through the first walls 30a and 31a of the first and second connecting members 30 and 31 and the first wall 32a and second wall 32b of the third connecting member 32. and penetrates. The first shaft 34A is supported by the first wall portion 32a and the second wall portion 32b of the first bearing sleeve 69L and the third connecting member 32 so as to be rotatable about the axis of the first bearing sleeve 69L.

The second shaft 34B is arranged concentrically to the right of the first shaft 34A. The second shaft 34B is inserted through the second bushing 69R. The second shaft 34B is supported by the second bushing 69R so as to be rotatable around the axis of the second bushing 69R.
The first shaft 34A and the second shaft 34B are spaced apart in the body width direction K2. As shown in FIG. 6 and the like, a connection member 11 is provided between the first shaft 34A and the second shaft 34B. The first shaft 34A and the second shaft 34B are connected by a connecting member 11 so as to rotate together.

As described above, the operating support shaft 34 consisting of the first shaft 34A and the second shaft 34B includes the first longitudinal member 27, the second longitudinal member 28, the first connecting member 30, the second connecting member 31, and the third connecting member 31. It is supported by the first wall portion 32 a of the connecting member 32 .
Note that the operation support shaft 34 may be composed of a single shaft.
The connecting member 11 includes a first side wall 11A connected to the first shaft 34A, a second side wall 11B connected to the second shaft 34B, and a connecting wall 11C connecting the first side wall 11A and the second side wall 11B. and an extension portion 11D extending upward from the second side wall 11B. 11 A of 1st side walls and the 2nd side wall 11B open a predetermined space|interval in the body width direction K2, and are arrange|positioned. The connecting wall 11C connects the rear ends of the first side wall 11A and the second side wall 11B.

A connecting tube 64 is provided on the first side wall 11A. A right end portion of the first shaft 34A is inserted into the connection tube 64 and fixed to the connection tube 64 . This allows the first shaft 34A and the first side wall 11A to rotate together.
A second shaft 34B is fixed to the second side wall 11B by welding or the like. A contact plate 11E and a first spring hooking portion 70 are provided on the extending portion 11D. The first spring hooking portion 70 is formed of a pin and protrudes from the extending portion 11D toward the first shaft 34A.

As shown in FIGS. 4 and 5, a second spring hook portion 72 is provided below the second wall 31b of the second connecting member 31. As shown in FIGS. The second spring hook 72 consists of a bent pin and is fixed to the holding plate 100 . The holding plate 100 is fixed to the plate surface of the second vertical member 28 on the inboard side of the fuselage and protrudes forward from the second vertical member 28 . The second spring hook portion 72 protrudes from the holding plate 100 toward the first shaft 34A and is bent forward.

As shown in FIG. 6 and the like, a cylindrical body 39L is provided on the left side of the first shaft 34A (between the first wall 30a of the first connecting member 30 and the first wall portion 32a of the third connecting member 32). is fitted. The tubular body 39L is fixed to the first shaft 34A by a pin or the like, and can rotate integrally with the first shaft 34A. A cylindrical spacer 39R is fitted on the right portion of the first shaft 34A (between the second wall portion 32b of the third connecting member 32 and the connecting member 11). The spacer 39R is fixed to the first shaft 34A by a pin or the like.

As shown in FIG. 2, a control valve 35 is provided on the control stand 23 . The control valve 35 is an assembly of a plurality of control valves V1 to V10 for controlling hydraulic actuators provided in the work machine 1, and is provided between the lower portions of the first vertical member 27 and the second vertical member .
Each of the control valves V1 to V10 is a direct acting spool type directional switching valve. The spool of each of the control valves V1 to V10 is held at a neutral position by the biasing force of a biasing spring accommodated in the valve body, and is moved up and down from the neutral position against the biasing force of the biasing spring. The plurality of control valves are a first control valve V1 to a tenth control valve V10. The first control valve V1 to the tenth control valve V10 are mechanically operated directional switching valves whose spools are manually switched.

The first control valve V1 is a shift control valve that controls a swash plate angle cylinder (not shown) that changes the tilt angle of the swash plate of the first travel motor M1 and the second travel motor M2 (FIG. 2). The second control valve V2 is a swing control valve that controls the swing motor M3 (FIG. 1). The third control valve V3 is an arm control valve that controls the arm cylinder C4 (FIG. 1). The fourth control valve V4 is a first travel control valve (travel control valve) that controls the first travel motor M1 (FIG. 1). The fifth control valve V5 is a dozer control valve that controls the dozer cylinder C1 (FIG. 1). The sixth control valve V6 is a backup control valve that controls the hydraulic attachment. The seventh control valve V7 is a second travel control valve (travel control valve) that controls the second travel motor M2 (FIG. 2). The eighth control valve V8 is a swing control valve that controls the swing cylinder C2 (FIG. 1). The ninth control valve V9 is a bucket control valve that controls the bucket cylinder C5 (FIG. 1). The tenth control valve V10 is a boom control valve that controls the boom cylinder C3 (FIG. 1). A third control valve V3, a ninth control valve V9, and a tenth control valve V10 are work control valves that control hydraulic actuators that drive the work device 4 (FIG. 1).

An operation shaft 33 is provided on the control table 23 . The operating shaft 33 is provided below the connecting body 29 and the operating support shaft 34 and above the control valve 35 . The operating shaft 33 has an axial center extending in the body width direction K2 and is provided across the first vertical member 27 and the second vertical member 28 . Further, the operating shaft 33 is supported by the first vertical member 27 and the second vertical member 28 so as to be rotatable around the axis. The right portion of the operating shaft 33 protrudes outward from the second longitudinal member 28 .

As shown in FIGS. 2 and 3, the operating shaft 33 is fitted with first to fifth rotating cylinders 38A to 38E. The third rotating barrel 38C rotates integrally with the operating shaft 33, and the other rotating barrels 38A, 38B, 38D, and 38E rotate relative to the operating shaft 33.
As shown in FIG. 3, a first relay piece 91A is provided on the rear portion of the first rotating cylinder 38A so as to protrude rearward. A second relay piece 91B is provided on the rear portion of the second rotating cylinder 38B so as to protrude rearward. A third relay piece 91C is provided on the rear portion of the fourth rotating cylinder 38D so as to protrude rearward. A fourth relay piece 91D is provided on the rear portion of the fifth turning cylinder 38E so as to protrude rearward.

As shown in FIG. 5, a first arm 39A protrudes forward from the front portion of the first rotating cylinder 38A. A second arm 39B is provided on the front portion of the second rotating cylinder 38B so as to protrude forward. A third arm 39C is provided on the front portion of the fourth rotating cylinder 38D so as to protrude forward. A fourth arm 39D is provided on the front portion of the fifth rotating cylinder 38E so as to protrude forward.

The first rotary cylinder 38A is linked to the spool S2 of the second control valve V2 via an arm 39A and a link 40A. The second rotating cylinder 38B is linked to the spool S3 of the third control valve V3 via an arm 39B and a link 40B. The third rotating cylinder 38C is linked to the spool S5 of the fifth control valve V5 via an arm 39C and a link 40C. The fourth rotary cylinder 38D is interlocked with the spool S9 of the ninth control valve V9 via an arm 39D and a link 40D. The fifth rotating cylinder 38E is linked to the spool S10 of the tenth control valve V109 via an arm 39E and a link 40E.

The control table 23 is provided with a plurality of levers, pedals, and the like for operating the work device 4, the travel device 3, and other devices provided in the work machine 1, respectively.
A dozer lever 66 for operating the dozer device 7 (FIG. 1) is provided on the right side B2 of the control table 23 . A base portion of the dozer lever 66 is fixed to the right portion of the operation shaft 33 . By swinging the dozer lever 66 back and forth, the operating shaft 33 and the third rotating cylinder 38C are rotated, and the spool S5 of the fifth control valve V5 is pushed and pulled via the arm 39C and the link 40C. Thereby, the dozer cylinder C1 is controlled and the dozer device 7 is driven.

An accelerator lever 67 for controlling the rotation speed of the motor Eg is provided on the left side B1 of the control table 23 . As shown in FIG. 2, a first pedal support portion 74 and a second pedal support portion 75 are provided below the first vertical member 27 . The first pedal support portion 74 supports a shift pedal (not shown) for operating the first control valve V1. The second pedal support portion 75 supports an SP pedal (not shown) for operating the sixth control valve V6. A third pedal support portion 76 is provided below the second vertical member 28 . The third pedal support portion 76 supports a swing pedal (not shown) for operating the eighth control valve V8.

An operation member 41 and an operation member 71 are provided above the control table 23 .
The operating member 41 constitutes a travel lever that operates the travel device 3 (travel control valve). The operation member 41 is arranged on the upper part of the control stand 23 and at the center in the machine width direction K2. The operating member 41 includes a left first travel lever 41L and a right second travel lever 41R. The first travel lever 41L and the second travel lever 41R are arranged side by side in the body width direction K2. The first travel lever 41L operates the first travel device 3L, and the second travel lever 41R operates the second travel device 3R. In addition, the first travel lever 41L is located inside the body of a first control lever 71L, which will be described later. The second travel lever 41R is positioned inside the body of a second control lever 71R, which will be described later.

The first travel lever 41L has a lever body 43L having a grip 42L at the tip (upper portion), and a tubular first base 44L provided at the bottom of the lever body 43L.
As shown in FIGS. 5 and 6, the first base portion 44L is arranged between the first connecting member 30 and the second connecting member 31. As shown in FIGS. The first shaft 34A of the operation support shaft 34 is inserted through the first base portion 44L. That is, the first base portion 44L is arranged around the first shaft 34A. The first base portion 44L is supported so as to be relatively rotatable with respect to the first shaft 34A around the axis of the first shaft 34A. As a result, the first travel lever 41L is supported by the operation support shaft 34 so as to be rotatable about the axis of the operation support shaft 34, and can be swung in the front-rear direction K1.

A first arm portion 45X made of a plate member is provided on the first base portion 44L so as to protrude forward. The first arm portion 45X rotates integrally with the first traveling lever 41L. One end (upper portion) of a connecting rod 48L is connected to the first arm portion 45X via a ball joint 49L. The other end (lower portion) of the connecting rod 48L is connected to the spool S4 of the fourth control valve V4. When the first traveling lever 41L is operated to swing back and forth, the first arm portion 45X swings up and down to push and pull the spool S4 of the fourth control valve V4 via the connecting rod 48L. As a result, the first traveling motor M1 is controlled to drive the first traveling device 3L.

As shown in FIG. 2, the second travel lever 41R includes a lever main body 43R having a grip 42R at the tip (upper portion) and a tubular second base portion 44R provided at the base (lower portion) of the lever main body 43R. have.
As shown in FIGS. 5 and 6, the second base portion 44R is arranged between the first connecting member 30 and the second connecting member 31. As shown in FIGS. The first shaft 34A of the operation support shaft 34 is inserted through the second base portion 44R. That is, the second base portion 44R is arranged around the first shaft 34A. The second base portion 44R is supported so as to be relatively rotatable with respect to the first shaft 34A around the axis of the first shaft 34A. As a result, the second travel lever 41R is supported by the operation support shaft 34 so as to be rotatable about the axis of the operation support shaft 34, and can be swung back and forth.

A first arm portion 45X made of a plate member is provided on the second base portion 44R so as to protrude forward. The second arm portion 45</b>Y and the first arm portion 45</b>X are arranged side by side in a direction parallel to the axial direction of the operation support shaft 34 . Also, the second arm portion 45Y rotates integrally with the second traveling lever 41R. One end side (upper portion) of a connecting rod 48R is connected to the second arm portion 45Y via a ball joint 49R. The other end side (lower portion) of the connecting rod 48R is connected to the spool S7 of the seventh control valve V7. When the second traveling lever 41R is operated to swing back and forth, the second arm portion 45Y swings up and down, pushing and pulling the spool S7 of the seventh control valve V7 via the connecting rod 48R. As a result, the second traveling motor M2 is controlled to drive the second traveling device 3R.

A control member 71 shown in FIG. 2 is a lever for operating the work device 4 and the machine body 2 . The control member 71 includes a first (left) control lever 71L provided on one side in the machine width direction K2 and a second (right) control lever 71R provided on the other side in the machine width direction K2. contains. The first control lever 71L and the second control lever 71R are arranged above the control table 23 and outside the operating member 41. As shown in FIG. The first control lever 71L is arranged on the outer side (left side) of the first travel lever 41L. The second control lever 71R is arranged on the outer side (right side) of the second travel lever 41R. For example, the arm 16 and the body 2 are operated with the first control lever 71L. For example, the boom 15 and the bucket 17 are operated with the second control lever 71R.

The first control lever 71L has a grip 78L at its tip (upper portion). A base portion (lower portion) of the first control lever 71L is supported by the support frame 25 via a first support 77L so as to be able to swing in an arbitrary swing direction. The second control lever 71R has a grip 78R at its tip (upper portion). A base portion (lower portion) of the second control lever 71R is supported by the support frame 25 via a second support 77R so as to be able to swing in an arbitrary swing direction. The swing directions of the first control lever 71L and the second control lever 71R are the front-rear direction K1, the body width direction K2, and the oblique direction between the front-rear direction K1 and the body width direction K2. The structure for swinging the operation member 71 is the same as that of known technology, so the description is omitted.

2, 3, and 5, by swinging the first control lever 71L in the body width direction K2, the first interlocking member 89A, the first relay piece 91A, the first rotating cylinder 38A, the first The spool S2 of the second control valve V2 is pushed and pulled via the arm 39A, the link 40A, and the like. As a result, the turning motor M3 is controlled and the body 2 is driven (turned). Further, by swinging the first control lever 71L in the front-rear direction K1, the second interlocking member 89B, the second relay piece 91B, the second rotating cylinder 38B, the second arm 39B, the link 40B, etc. , the spool S3 of the third control valve V3 is pushed and pulled. Thereby, the arm cylinder C4 is controlled and the arm 16 is driven (swinged).

By swinging the second control lever 71R in the body width direction K2, through the third interlocking member 89C, the third relay piece 91C, the fourth rotating cylinder 38D, the fourth arm 39D, the link 40D, etc., The spool S9 of the ninth control valve V9 is pushed and pulled. As a result, the bucket cylinder C5 is controlled to drive (swing) the bucket 17 . Further, by swinging the second control lever 71R in the front-rear direction K1, the fourth interlocking member 89D, the fourth relay piece 91D, the fifth rotating cylinder 38E, the fifth arm 39E, the link 40E, etc. , the spool S10 of the tenth control valve V10 is pushed and pulled. As a result, the boom cylinder C3 is controlled and the boom 15 is driven (swinged).

As shown in FIGS. 2, 3, and 6, electrical components 140L and 140R are provided between the operating member 41 and the operating member 71. As shown in FIGS. In FIG. 5, illustration of the electrical components 140L and 140R is omitted.
Since the electrical components 140L and 140R are inside the control stand 23, they are covered with the cover 26. As shown in FIG. The electrical components 140L and 140R operate according to the operation of the operating member 41. FIG. Specifically, the first electrical component 140L on the left side is a sensor that detects the operating position (swing position) of the first travel lever 41L. The second electrical component 140R on the right side is a sensor that detects the operating position (swing position) of the second travel lever 41R.

The electrical components 140L and 140R are arranged above the operation support shaft 34 and near the bases 44L and 44R of the operation member 41 . Electrical wiring (not shown) for supplying power to the electrical components 140L and 140R, and electrical wiring (not shown) for transmitting electrical signals output by the electrical components 140L and 140R to an electronic control device (not shown) provided in the working machine 1. are arranged above the operation support shaft 34 and near the bases 44L and 44R of the operation member 41. As shown in FIG.

As shown in FIGS. 1 and 2 , lock levers 50 are provided on the left and right sides of the control table 23 . The lock lever 50 is a member that performs an operation of locking (mechanically restraining the operating member 41 and the operating member 71 so as not to move) and an unlocking operation (releasing the mechanical restraint so that it can move). is.
Lock lever 50 includes a first lever 50L positioned on the left side of control base 23 and a second lever 50R positioned on the right side of control base 23 . The first lever 50L is arranged outside the fuselage of the first control lever 71L. The second lever 50R is arranged outside the second control lever 71R.

As shown in FIG. 2, the first lever 50L has a lever body 52L having a grip 51L at the tip (upper part) and a first base plate 53L fixed to the base (lower part) of the lever body 52L. The second lever 50R has a lever main body 52R having a grip 51R at the tip (upper portion), and a second base plate 53R fixed to the base (lower portion) of the lever main body 52R.

As shown in FIG. 6, the lever main body 52L of the first lever 50L is fixed to one end of the first base plate 53L, and the left end of the first shaft 34A of the operation support shaft 34 is fixed to the other end. is fixed. The lever main body 52R of the second lever 50R is fixed to one end of the second base plate 53R, and the right end of the second shaft 34B of the operation support shaft 34 is fixed to the other end. As a result, the first lever 50L and the second lever 50R (lock lever 50) can be rotated integrally with the operation support shaft 34, and can be swung up and down as shown in FIG.

The lock lever 50 can be moved between a first position X1 and a second position X2 shown in FIGS. 19 and 20 by being operated to swing up and down.
The first position X1 is a position in which the lock lever 50 is raised (a state in which the lock lever 50 moves upward from the base to the tip) and does not prevent the driver D from getting on and off the vehicle through the passage 22. It is a position (a position that allows getting on and off). Also, in other words, the first position X1 is a position to the side of the control stand 23 and is a position where the passage 22 is opened.

The second position X2 is a position in which the lock lever 50 is lowered (a state in which the lock lever 50 moves rearward from the base portion toward the tip portion) and prevents the driver D from getting on and off through the passage 22. (a position that prevents getting on and off). In other words, the second position X2 is a position extending from the control platform 23 toward the rear of the fuselage and blocking the passage 22 .

When the lock lever 50 is at the first position X1, the operating member 41 and the operating member 71 are locked and the operating member 41 and the operating member 71 are disabled. When the lock lever 50 is at the second position X2, the operating member 41 and the operating member 71 are unlocked (unlocked), and the operating member 41 and the operating member 71 become operable.
When the operating member 41 and the operating member 71 are locked, the first lever 50L and the second lever 50R do not prevent the driver D from getting on and off the driver's seat 6 via the passage 22.例文帳に追加When the operating member 41 and the operating member 71 are not locked, the first lever 50L and the second lever 50R prevent the driver D from getting on and off the driver's seat 6 via the passage 22. Therefore, it becomes clear whether the operating member 41 and the operating member 71 are locked or unlocked.

As shown in FIGS. 4 and 6 , a positioning mechanism 96 for the lock lever 50 is provided on the upper portion of the first vertical member 27 and inside the machine body. The positioning mechanism 96 has a contact member 97 , a first stopper 98 and a second stopper 99 . The abutting member 97 is provided to protrude from the cylindrical body 39L in the radial direction thereof. The first shaft 34A of the operation support shaft 34 is inserted through the cylindrical body 39L. The cylindrical body 39L and the first shaft 34A are fixed. Therefore, the cylindrical body 39L and the contact member 97 rotate integrally with the operation support shaft 34. As shown in FIG.

The first stopper 98 is a bolt. It is screwed into a threaded hole (not shown) formed through the second wall 30 b of the first connecting member 30 . A threaded hole is a hole with a female thread on the inner circumference. A first lock nut 102 (FIG. 5) that fixes the axial position of the first stopper 98 is screwed to the first stopper 98 . The contact member 97 contacts the first stopper 98 when the lock lever 50 is at the first position X1.

When the contact member 97 contacts the first stopper 98 by rotating the lock lever 50, the lock lever 50 is rotated in a direction from the second position X2 to the first position X1 (locking direction F1 in FIG. 7A to be described later). rotation is regulated. Thereby, the lock lever 50 is positioned at the first position X1.
The second stopper 99 is a bolt. The second stopper 99 is screwed into a screw hole (not shown) passing through the holding plate 101 . The holding plate 101 is fixed to the plate surface of the first vertical member 27 on the inboard side of the fuselage so as to protrude inward of the fuselage. A second lock nut 104 that fixes the axial position of the second stopper 99 is screwed to the second stopper 99 . The contact member 97 contacts the second stopper 99 when the lock lever 50 is at the second position X2.

By rotating the lock lever 50, when the contact member 97 comes into contact with the second stopper 99, the lock lever 50 moves from the first position X1 to the second position X2 (unlocking direction F2 in FIG. 7B, which will be described later). ) is regulated. Thereby, the lock lever 50 is positioned at the second position X2.
By screwing or retracting the first stopper 98, the contact position between the contact member 97 and the first stopper 98 can be changed. Thereby, the position of the lock lever 50 around the operation support shaft 34 (the angle of the lock lever 50) at the first position X1 can be adjusted. Further, by screwing and retracting the second stopper 99, the contact position between the contact member 97 and the second stopper 99 can be changed. Thereby, the position (angle of the lock lever 50) around the operation support shaft 34 at the second position X2 of the lock lever 50 can be adjusted.

The operating force applied to the lock lever 50 is received by the flat surface via the contact surface when the contact member 97 contacts the first stopper 98 or the second stopper 99 . As a result, the lock lever 50 is prevented from being displaced around the axis with respect to the operation support shaft 34 .
An urging member 106 that holds the lock lever 50 at the first position X1 and the second position X2 is provided on the upper portion of the second vertical member 28 and inside the body. Biasing member 106 is a tension coil spring. One end of the biasing member 106 is hooked on a first spring hooking portion 70 ( FIG. 6 ) provided on the connecting member 11 . The other end of the biasing member 106 is hooked on a second spring hook 72 (FIGS. 4 and 5) fixed to the second vertical member 28 via the holding plate 100. As shown in FIG.

The direction of the biasing force of the biasing member 106 on the lock lever 50 is switched between when the lock lever 50 is positioned at the first position X1 and when the lock lever 50 is positioned at the second position X2.
That is, when the lock lever 50 is at the first position X1, the axial center of the biasing member 106 is located above the axial center of the operation support shaft 34 (first position X1 side). Therefore, when the lock lever 50 is at the first position X1, the biasing force of the biasing member 106 rotates the lock lever 50 in the upward direction (lifting direction of the grips 51L and 51R, lock direction F1 in FIG. 7A). acts on This biasing force holds the lock lever 50 at the first position X1.

Further, when the lock lever 50 is at the second position X2, the axial center of the biasing member 106 is located below the axial center of the operation support shaft 34 (on the second position X2 side). Therefore, when the lock lever 50 is at the second position X2, the biasing force of the biasing member 106 rotates the lock lever 50 in the tilting direction (downward direction of the grips 51L and 51R, unlocking direction F2 in FIG. 7B). acts on This biasing force holds the lock lever 50 at the second position X2.

As shown in FIG. 6, a third stopper 105 is provided in front of the contact plate 11E of the connecting member 11. As shown in FIG. The third stopper 105 is a bolt. The third stopper 105 is screwed into a threaded hole (not shown) formed through the second wall 31 b of the second connecting member 31 . A third lock nut 108 (FIG. 5) for fixing the position of the third stopper 105 is screwed to the third stopper 105 . The contact plate 11E contacts the third stopper 105 when the lock lever 50 is at the first position X1. This also restricts the upward rotation of the lock lever 50 .

As described above, when the first stopper 98 is screwed forward and backward to adjust the position of the lock lever 50 around the operation spindle 34 in the first position X1, the third stopper 105 is also screwed forward. and screw back.
As shown in FIG. 3 and the like, a lock mechanism 114 that locks or unlocks the operation member 41 is provided near the center of the operation support shaft 34 . Lock mechanisms 112 and 113 for locking or unlocking the operation member 71 are provided on both left and right sides of the lock mechanism 114 . The structure and action of the lock mechanisms 112 and 113 for the steering member 71 are the same as those of the known art, so the explanation is omitted.

Next, the lock mechanism 114 will be explained.
FIG. 7A is a cross-sectional view showing the locked state of the lock mechanism 114. FIG. FIG. 7B is a cross-sectional view showing the unlocked state of the lock mechanism 114. FIG.
The lock mechanism 114 can change its operation between a locked state that restricts the movement of the operating member 41 and an unlocked state that allows the movement of the operating member 41 . As shown in FIGS. 6 to 7B, the lock mechanism 114 has engagement portions 45L and 45R, a lock body 126, a lock support shaft 128, and a drive portion 131. As shown in FIGS.

As shown in FIG. 6, the first engaging portion 45L is provided in a shape projecting rearward from the first base portion 44L of the first traveling lever 41L and radially outward of the first base portion 44L and the operation support shaft 34. ing. The second engaging portion 45R is provided so as to protrude rearward from the second base portion 44R of the second traveling lever 41R and radially outward of the second base portion 44R and the operation support shaft 34 . Therefore, the first engaging portion 45L rotates integrally with the first travel lever 41L, and the second engaging portion 45R rotates integrally with the second travel lever 41R. That is, the engaging portions 45L and 45R rotate integrally with the operating member 41. As shown in FIG.

A first engaging groove 46L is formed at the tip of the first engaging portion 45L. A second engaging groove 46R is formed at the tip of the second engaging portion 45R. The first engagement groove 46L and the second engagement groove 46R are recessed radially inward of the operation support shaft 34 from the rear to the front. In other words, the first engagement groove 46L and the second engagement groove 46R are grooves that are open rearward, and extend from the tips of the first engagement portion 45L and the second engagement portion 45R to the operation spindle 34 side. It's sunken. As shown in FIGS. 7A and 7B, the upper and lower front portions of the first engaging groove 46L and the second engaging groove 46R are provided with inclined surfaces that form tapered surfaces that widen the distance between them toward the rear. 47 is provided.

As shown in FIG. 6, a mounting plate 129 is fixed to the lower base portion 32c of the third connecting member 32. As shown in FIG. The mounting plate 129 protrudes rearward from the lower base portion 32c. Each plate surface of the mounting plate 129 faces upward or downward. A first support piece 129B and a second support piece 129C are fixed to the upper surface of the mounting plate 129 so as to protrude upward. The first support piece 129B and the second support piece 129C are spaced apart from each other in the body width direction K2.

The lock support shaft 128 is supported by the lower base portion 32c via the mounting plate 129 by passing through the first support piece 129B and the second support piece 129C. Also, the lock support shaft 128 is arranged below the operation support shaft 34 . Furthermore, the lock support shaft 128 has an axial center extending in the body width direction K2 and is arranged parallel to the operation support shaft 34 .
The lock body 126 has a base tube 126A, a lock arm 126B and a lock pin 126C. The base tube 126A constitutes the lower end (one end) of the lock body 126. As shown in FIG. The base tube 126A is mounted around a lock support shaft 128 so as to be rotatable about its axis. That is, one end of the lock body 126 is rotatably supported by the lock support shaft 128 . In addition, the lock body 126 is arranged below the electrical components 140L and 140R with a predetermined gap therebetween.

The lock arm 126B is provided on the base tube 126A so as to project radially outward and upward. Also, the lock arm 126B bends forward as it goes upward. The lock arm 126B and the base cylinder 126A are provided at corresponding positions between the first engaging portion 45L and the second engaging portion 45R. As the base tube 126A rotates about the axis of the lock support shaft 128, the lock arm 126B swings back and forth.

The lock pin 126C is provided at an intermediate portion between one end located below and the other end located above the lock arm 126B. The lock pin 126C is fixed to the lock arm 126B while penetrating the intermediate portion of the lock arm 126B in the left and right direction. That is, the lock pin 126C protrudes from the intermediate portion of the lock arm 126B to both sides in the machine body width direction K2. The left and right projection lengths of the lock pin 126C from the lock arm 126B are the same.

A cylinder 127 is provided between the first base portion 44L of the first travel lever 41L and the second base portion 44R of the second travel lever 41R. The cylindrical body 127 is mounted around the first shaft 34A of the operation support shaft 34 and fixed to the first shaft 34A.
The driving portion 131 applies a driving force to the upper end portion (the other end portion) of the locking body 126 and has an interlocking portion 132 and a connecting member 133 . The interlocking portion 132 is provided on a cylindrical body 127 mounted around the operation support shaft 34 so as to protrude radially outward and obliquely upward from the cylindrical body 127 . That is, the interlocking portion 132 is provided on the operation support shaft 34 via the cylinder 127 . The cylindrical body 127 and the interlocking portion 132 rotate integrally with the operation support shaft 34 . As another example, the interlocking portion 132 may be provided on the operation spindle 34 itself.

The connecting member 133 is arranged above the operation spindle 34 and connects the interlocking portion 132 and the lock body 126 . Specifically, the front end portion of the connecting member 133 is rotatably connected to the interlocking portion 132 via a pin 135 . A rear end portion of the connecting member 133 is rotatably connected to an upper end portion of the lock body 126 via a pin 136 .
As shown in FIG. 7A, when the lock lever 50 is at the first position X1, the lock pin 126C is engaged (inserted) in the first engagement groove 46L and the second engagement groove 46R. As a result, the vertical movement of the first engaging portion 45L and the second engaging portion 45R is restrained (prevented), so that the movement of the first travel lever 41L and the second travel lever 41R is also restrained. The rocking operation of 41 becomes impossible.

That is, in FIG. 7A, the lock body 126 is at the engaging position P1 where it engages with the first engaging portion 45L and the second engaging portion 45R to restrain the movement of the operating member 41. As shown in FIG. Also, the lock mechanism 114 is in a locked state that restrains the movement of the operation member 41 .
By adjusting the mounting position of the mounting plate 129 with respect to the lower base portion 32c of the third connecting member 32, the position of the lock pin 126C with respect to the first engaging groove 46L and the second engaging groove 46R can be adjusted. Further, by adjusting the contact position between the first stopper 98 and the contact member 97, the insertion depth of the lock pin 126C into the first engagement groove 46L and the second engagement groove 46R can be adjusted.

From the locked state of FIG. 7A, the lock lever 50 is tilted rearward (on the side of the driver's seat 6 in FIG. 17, etc.) to be positioned at the second position X2. Then, the driving portion 131 transmits the operating force for changing the position of the lock lever 50 to the upper end portion of the lock body 126 as a driving force to rotate the lock body 126 about the axis of the lock support shaft 128 . Let Specifically, the operating force applied to the lock lever 50 rotates the operating support shaft 34, the cylindrical body 127, and the interlocking portion 132 in the unlocking direction F2. Then, as shown in FIG. 7B, the interlocking portion 132 moves the connecting member 133 rearward, and the connecting member 133 moves the upper end portion of the lock arm 126B rearward. Therefore, the lock arm 126B rotates (rocks) about the axis of the lock support shaft 128 in the unlocking direction F2. Then, the lock pin 126C moves rearward and disengages from the first engaging groove 46L and the second engaging groove 46R.

As a result, the vertical movement of the first engaging portion 45L and the second engaging portion 45R is permitted (restriction is released), so that the movement of the first travel lever 41L and the second travel lever 41R is also permitted. Swinging operation of the member 41 becomes possible.
That is, in FIG. 7B, the lock body 126 is at the disengaged position P2 where the operation member 41 is disengaged from the first engaging portion 45L and the second engaging portion 45R and allowed to move. Also, the lock mechanism 114 is in an unlocked state in which the operation member 41 is allowed to move.

From the unlocked state of FIG. 7B, the lock lever 50 is raised upward to be positioned at the first position X1. Then, the driving portion 131 transmits the operating force for changing the position of the lock lever 50 to the upper end portion of the lock body 126 as a driving force to rotate the lock body 126 about the axis of the lock support shaft 128 . Let Specifically, the operating force applied to the lock lever 50 rotates the operation support shaft 34, the cylindrical body 127, and the interlocking portion 132 in the lock direction F1. Then, as shown in FIG. 7A, the interlocking portion 132 moves the connecting member 133 forward, and the connecting member 133 moves the upper end portion of the lock arm 126B forward. Therefore, the lock arm 126B rotates (rocks) about the axis of the lock support shaft 128 in the lock direction F1. Then, the lock pin 126C moves forward and engages with the first engagement groove 46L and the second engagement groove 46R.

As a result, the vertical movement of the first engaging portion 45L and the second engaging portion 45R and the movement of the first travel lever 41L and the second travel lever 41R are restrained, and the swinging operation of the operating member 41 is disabled. It becomes possible.
That is, the lock body 126 engages with the first engaging portion 45L and the second engaging portion 45R as shown in FIG. 7A from the disengaged position P2 shown in FIG. The position is changed (moved) to the aligned position P1. Also, the lock mechanism 114 returns to the state in which the operation member 41 is locked.

As described above, the locking body 126 is changeable between the engagement position P1 shown in FIG. 7A and the disengagement position P2 shown in FIG. 7B.
In the unlocked state shown in FIG. 7B, the lock mechanism 114 is close to the second cover 26B side, that is, the driver's seat 6 side (rear) from the operation support shaft 34 . That is, the lock mechanism 114 is located on the side of the driver's seat 6 (rearward) from a position equivalent to the operation support shaft 34 (position in the front-rear direction K1) when viewed from the machine body width direction K2. In other words, in the unlocked state, the lock mechanism 114 is positioned closer to the second cover 26B side, i.e., the driver's seat 6 , with respect to the frontmost portion (front end) of the operation support shaft 34 (first cover 26A side). located on the side (rear). In this embodiment, as shown in FIG. 7B, in the unlocked state, a portion of the lock mechanism 114 (the front end of the interlocking portion 132) overlaps the operation support shaft 34 in the front-rear direction K1. It is located behind the front end of the operation support shaft 34 .

In the locked state shown in FIG. 7A , members other than the interlocking portion 132 of the lock mechanism 114 and the front end portion of the connecting member 133 and other portions are positioned toward the second cover 26B (on the side of the driver's seat 6 ) from the operation support shaft 34 . I'm stopping by That is, the central portion to the rear end portion of the connecting member 133, the lock body 126, the lock support shaft 128, and the engaging portions 45L and 45R are arranged from a position equivalent to the operation support shaft 34 from the driver's seat when viewed from the machine width direction K2. Located on the 6th side. In other words, in the locked state, members other than the interlocking portion 132 of the lock mechanism 114 and the front end portion of the connecting member 133 and other portions are located on the second cover 26B side with respect to the front end portion of the operation support shaft 34, i.e., It is located on the driver's seat 6 side (rear).

As shown in FIGS. 7A and 7B, the lock body 126, the lock spindle 128, and the engaging portions 45L and 45R are always arranged on the second cover 26B side with respect to the operation spindle . That is, the lock support shaft 128 and the engaging portions 45L and 45R are always located on the driver's seat 6 side (rear) from the operation support shaft 34 when viewed from the machine body width direction K2.
Further, each part of the lock mechanism 114 is arranged in the vicinity of the joint part 26X between the first cover 26F and the second cover 26B.

As another example, by changing the shape of each part of the lock mechanism 114, each part of the lock mechanism 114 is positioned from the operation spindle 34 to the second cover 26B side (driver's seat 6 side) in both the locked state and the unlocked state. You may make it stop by. Further, each part of the lock mechanism 114 may be closer to the driver's seat 6 side than the operation support shaft 34 in at least one of the locked state and the unlocked state. Further, all or most of the lock mechanism 114 may be arranged closer to the second cover 26B than the joint 26X between the first cover 26F and the second cover 26B.

Lock mechanism 114 is normally covered by cover 26 . However, as shown in FIG. 2, the lock mechanism 114 is exposed by removing the second cover 26B from the support frame 25 and the first cover 26F. Alternatively, as shown in FIG. 1, the locking mechanism 114 is exposed by opening the window 26c by opening the lid 26g provided on the rear surface 26a of the second cover 26B. That is, the second cover 26B is provided so that the lock mechanism 114 can be exposed to the driver's seat 6 side.

In the above embodiment, the operating force of the lock lever 50 is used as the driving force of the driving portion 131, but instead of this, the driving force is generated by an actuator 139 provided in the driving portion 131 as shown in FIGS. 8A and 8B. You may
FIG. 8A is a cross-sectional view showing the locked state of the lock mechanism 114 of the modified example. FIG. 8B is a cross-sectional view showing the unlocked state of the lock mechanism 114 of the modification.

The driving portion 131 of the locking mechanism 114 shown in FIGS. 8A and 8B has an actuator 139 that generates driving force. Actuator 139 may be, for example, a hydraulic actuator such as a hydraulic cylinder, or an electric actuator such as a solenoid.
A cylinder 137 is provided around the operation support shaft 34 . The cylindrical body 137 is relatively rotatable with respect to the operation support shaft 34 . The cylindrical body 137 is provided with interlocking portions 132a and 132b. The interlocking portion 132a protrudes obliquely upward from the cylindrical body 137 in the radial direction. A front end portion of a connecting member 133 is rotatably connected to the interlocking portion 132a via a pin 135. As shown in FIG.

The interlocking portion 132b protrudes obliquely downward from the cylindrical body 137 in the radial direction. A pin 138a included in a link mechanism 138 is engaged with a long hole 132c formed in the interlocking portion 132b. The link mechanism 138 is connected with the manipulator 139 a of the actuator 139 . The link mechanism 138 transmits the driving force generated by the actuator 139 to the interlocking portion 132b. A body portion 139b of the actuator 139 is fixed to the front base portion 32f (FIG. 4) of the third connecting member 32, for example.

An operation tool such as a button, switch, or lever for driving the actuator 139 may be provided on the operation table 23 or the like. Also, a control unit for controlling the operation of the actuator 139 may be provided on the console 23 .
In the state shown in FIG. 8A, the actuator 139 generates a driving force for projecting the manipulator 139a toward the rear A2 of the body 2 by means of an elastic member (not shown) such as a built-in spring. Therefore, the driving force of the actuator 139 is transmitted to the link mechanism 138, the interlocking portion 132b, the cylindrical body 137, the interlocking portion 132a, the connecting member 133, and the lock body 126 in order, and the lock body 126 rotates in the lock direction F1. in a state. Also, the lock pin 126C is engaged with the engagement grooves 46L and 46R. That is, in FIG. 8A, the lock body 126 is at the engagement position P1, and the lock mechanism 114 is in a state where the operation member 41 is locked.

From the locked state, the actuator 139 is driven to move the manipulator 139a forward A1 of the machine body 2 (pulled state into the body portion 139b). Then, the driving force is sequentially transmitted to the interlocking portion 132b, the cylindrical body 137, the interlocking portion 132a, the connecting member 133, and the lock body 126, and as shown in FIG. 8B, the lock body 126 rotates in the unlocking direction F2. . Then, the lock pin 126C is disengaged from the engagement grooves 46L and 46R. That is, in FIG. 8B, the lock body 126 has moved to the disengaged position P1 and the lock mechanism 114 has unlocked the operation member 41 .

In addition to the above, for example, the link mechanism 138, the interlocking portions 132a and 132b, the cylindrical body 137, and the connecting member 133 may be omitted, and the operator 139a of the actuator 139 may be directly or indirectly connected to the upper end portion of the lock body 126. You may In this case, the driving force of the actuator 139 is directly or indirectly applied to the lock body 126, the lock body 126 rotates in the lock direction F1 or the unlock direction F2, and the lock pin 126C moves toward the engagement grooves 46L and 46R. Engagement or disengagement is possible.

Next, the internal structure of the airframe 2 will be described.
FIG. 9 is a schematic diagram showing the internal structure of the fuselage 2, electric circuits, and flow paths.
Inside the body 2 of the work machine 1 are a swing cylinder C2, a swing motor M3, a prime mover Eg, an alternator Ot, a cooling device Rg, an oil cooler Oc, hydraulic pumps Q1 and Q2, a battery Bt, a hydraulic oil tank T1, and a fuel tank T2. , electric circuits 320, 321, flow paths 230, 280, 300, 302, 310, and various devices 201 to 209 are provided. These are fixed by a frame or other members provided inside the body 2 .

In FIG. 9, the control valve 35 is shown inside the airframe 2 for convenience, but as shown in FIG. For the sake of convenience, the electric equipment 330 is also shown inside the fuselage 2. The electric equipment 330 includes the electric equipment 18s, 140L, and 140R (FIGS. 1 and 2, etc.) provided on the cockpit 23, Other electrical devices (not shown) such as lights provided at other locations of the working machine 1 are included.

The turning motor M3 is arranged near the center of the airframe 2 . The swing cylinder C2 is arranged on the front right portion of the fuselage 2 . The prime mover Eg is arranged behind the turning motor M3. The alternator Ot is arranged above the prime mover Eg. The prime mover Eg is a drive source that drives the hydraulic pumps Q1 and Q2, the alternator Ot, and the like.
The alternator Ot is driven by the driving force of the prime mover Eg to generate electricity. The electricity generated by the alternator Ot passes through the electric line 321 and charges the battery Bt. Battery Bt is a storage battery. Also, the battery Bt and the alternator Ot are power sources. The electric line 321 consists of an electrical harness.

The cooling device Rg is arranged on the right side B2 of the prime mover Eg. Cooling device Rg consists of a radiator and a cooling fan. A coolant flow path 302 is arranged from the radiator of the cooling device Rg to the periphery of the prime mover Eg. The cooling liquid flow path 302 is composed of a hose, a steel pipe, or the like. The radiator of the cooling device Rg cools the engine Eg by circulating coolant through the coolant flow path 302 .

The hydraulic pumps Q1 and Q2 are arranged on the left side B1 of the prime mover Eg. The hydraulic oil tank T1 is arranged at the rear A2 of the prime mover Eg and at the rear of the fuselage 2 . The hydraulic oil tank T1 is equipped with hydraulic motors M1 to M3 (first travel motor M1, second travel motor M2, swing motor M3) and hydraulic cylinders C1 to C5 (dozer cylinder C1, swing cylinder C2, boom cylinder C3, an arm cylinder C4, and a bucket cylinder C5) are operated to operate hydraulic actuators such as the work device 4 and the travel device 3 to store hydraulic oil. In FIG. 9, for the sake of convenience, the traveling motors M1 and M2 are shown in the upper part, and the hydraulic cylinders C1, C3, C4, and C5 are shown on the left side. The installation positions of these hydraulic actuators are as shown in FIGS. is.

The hydraulic pump Q1 is driven by the driving force of the prime mover Eg, sucks hydraulic oil from the hydraulic oil tank T1 through the hydraulic oil passage 230, and discharges it to the hydraulic actuators M1-M3 and C1-C5. Hydraulic actuators M1 to M3 and C1 to C5 are driven by the hydraulic pressure of this hydraulic pump Q1. The hydraulic pump Q<b>2 is driven by the driving force of the prime mover Eg, and discharges through the hydraulic fluid flow path 230 the hydraulic hydraulic pressure for the pilot that operates the control valve 35 and the hydraulic hydraulic pressure for the signal. The hydraulic fluid flow path 230 consists of hoses or steel pipes.

The oil cooler Oc is arranged on the right side B2 of the cooling device Rg. The oil cooler Oc cools the hydraulic fluid that returns from the hydraulic actuators M1-M3, C1-C5 and the control valve 35 to the hydraulic fluid tank T1 through the hydraulic fluid flow path 230. FIG.
The battery Bt is arranged above the hydraulic oil tank T1. The battery Bt supplies electric power to the electrical equipment 330 provided in the work machine 1, an ignition device (not shown) provided in the prime mover Eg, electrical equipment 203, 204, 205, etc., which will be described later. The battery Bt is also included in the electrical equipment. The battery Bt, the hydraulic oil tank T1, and the engine Eg are arranged inside the bonnet 5 . A driver's seat 6 ( FIG. 17 ) is arranged above the bonnet 5 .

The fuel tank T2 is arranged on the left side of the fuselage 2 toward the front. The fuel tank T2 stores fuel for driving the prime mover Eg.
A plurality of devices 201, 202, 203, 204, 205, 208 (second fuel filter (fuel device) 201, fuel pump (fuel device) 202, isolator (electrical device ) 203, a fuse box (electrical equipment) 204, a timer (electrical equipment) 205, and a first fuel filter (fuel equipment) 208). Among these, the second fuel filter 201, the fuel pump 202, and the first fuel filter 208 are fuel devices provided in a fuel flow path 280 that supplies fuel from the fuel tank T2 to the prime mover Eg.

Specifically, the fuel pump 202 sends fuel from the fuel tank T2 through the fuel passage 280 to the prime mover Eg. The first fuel filter 208 and the second fuel filter 201 remove foreign matter mixed in the fuel flowing through the fuel flow path 280 . Fuel passage 280 consists of a hose.
Isolator 203, fuse box 204, and timer 205 are provided on electrical path 320 from battery Bt. A current flows through the electrical circuit 320 in these electrical devices 203 , 204 , 205 . The electric circuit 320 is composed of electric wires, harnesses, and the like.

The isolator 203 blocks the flow of current from the battery Bt to other electric devices 330 and the like during maintenance or in an emergency. The fuse box 204 incorporates a plurality of fuses that suppress overcurrent from flowing from the battery Bt to other electric devices 330 and the like. The isolator 203 is arranged on the negative terminal -bt side of the battery Bt, and the fuse box 204 is arranged on the positive terminal +bt side of the battery Bt. The timer 205 is used to check whether the remaining fuel warning lamp (not shown) and the water temperature warning lamp (not shown) are out.

A reserve tank (cooling device) 206 and a hose 207 are arranged above the right portion of the hydraulic oil tank T1. Among these, the reserve tank 206 stores the coolant for the cooling device Rg. The hose 207 constitutes part of the coolant flow path 300 . Coolant flow path 300 is a flow path through which coolant flows between reserve tank 206 and cooling device Rg. A reserve tank 206 is provided in the coolant flow path 300 .

An air cleaner 209 is arranged on the rear side A2 of the fuel tank T2 and on the left side B1 of the hydraulic pumps Q1 and Q2. The air cleaner 209 cleans the air around the prime mover Eg through an intake air flow path 310 . Exhaust air from the air cleaner 209 passes through an exhaust air flow path 310 and is discharged to the outside from a vent (not shown) provided on the right side of the fuselage 2 .

The plurality of devices 201 to 209 and Bt described above are the first devices 203, 204, and 205 (isolator 203, fuse box 204, timer 205, battery Bt) provided in the electrical circuit 320 that conducts electricity, oil, fuel, and cooling. Second devices 201, 202, 206, 207, 208, 209 (second fuel filter 201, fuel pump 202, reserve tank 206, It is roughly divided into a hose 207, a first fuel filter 208, and an air cleaner 209). In other words, the plurality of devices 201 to 209, Bt include devices provided in different piping systems (flow paths 230, 280, 300, 310) or wiring systems (electric line 320).

Also, the wires and harnesses that are provided in the electric circuit 320 and that constitute the electric circuit are included in the first device in the wiring system. The hoses, steel pipes, and the like that are provided in the flow paths 230, 280, 300, and 310 and constitute the flow paths are included in the second device in the piping system.
FIG. 10 is a front perspective view of the vicinity of the hydraulic oil tank T1. FIG. 11 is a plan view of the vicinity of the hydraulic oil tank T1. FIG. 12 is a rear view of the vicinity of the hydraulic oil tank T1.

As shown in FIG. 10, the hydraulic oil tank T1 is L-shaped when viewed in the front-rear direction K1. The hydraulic oil tank T1 has a tank lower portion 211 and a tank upper portion 212 . The lateral width of the tank lower portion 211 parallel to the fuselage width direction K2 is wider than the lateral width of the tank upper portion 212 . The tank upper portion 212 protrudes upward from the left portion of the tank lower portion 211 (the end on the B1 direction side in FIG. 10).

As shown in FIG. 11, the longitudinal width of the tank lower portion 211 and the longitudinal width of the tank upper portion 212, which are parallel to the longitudinal direction K1 of the airframe 2, are the same. The internal space of the tank lower part 211 and the internal space of the tank upper part 212 are continuous (not shown).
As shown in FIG. 10, the hydraulic oil tank T1 has an inclined side wall 213 on the left lower portion of the tank lower portion 211. As shown in FIG. The inclined side wall 213 is recessed toward the center of the tank lower portion 211 from the front wall 211 f and the left side wall 211 L of the tank lower portion 211 and faces the front left side of the fuselage 2 . The inclined side wall 213 is formed with an opening 214 that is a through hole. A lid 220 that closes the opening 214 is attached to the inclined side wall 213 .

A cylindrical connecting portion 221 is integrally provided in the central portion of the lid 220 . The connecting portion 221 penetrates the lid body 220 . One end of the hose 231 is connected to one end of the connecting portion 221 exposed from the lid 220 . The other end of the connecting portion 221 protrudes into the internal space of the tank lower portion 211 . A filter (not shown) is attached to the other end of the connecting portion 221 to remove foreign matter mixed in the hydraulic oil.

The hose 231 forms part of the hydraulic fluid flow path 230 shown in FIG. The other end of the hose 231 is connected to hydraulic pumps Q1 and Q2. The internal space of the hose 231, the internal space of the connecting portion 221, and the internal space of the tank lower portion 211 are continuous. An opening 214 of the tank lower portion 211 is an outlet through which hydraulic oil flows out from the hydraulic oil tank T1.
A pedestal 215 is integrally formed with the tank lower portion 211 on the right side of the upper wall 211u of the tank lower portion 211 so as to protrude upward. A mounting member 240 is mounted on the base 215 .

FIG. 13A is a front view of the vicinity of the mounting member 240 in FIG. 10 and the like. FIG. 14 is a perspective view of the mounting member 240 as seen from the front. 15 is a plan view of the mounting member 240. FIG. 16 is a rear view of the mounting member 240. FIG.
As shown in FIGS. 14 to 16, the mounting member 240 is integrated with the lid body 244. As shown in FIGS. Also, the mounting member 240 has a base portion 241 and a support portion 250 . The base portion 241 is provided between the lid body 244 and the support portion 250 . The lid 244 and the support portion 250 are formed integrally with the base portion 241 . The lid body 244, the support part 250, and the base part 241 are fixed to each other by welding or the like, and configured as an inseparable integral body. In other words, the mounting member 240 is configured as an integrated body in which the positional relationship of the lid 244, the support portion 250, and the base portion 241 is fixed.

The base portion 241 has a first wall 242 and a second wall 243 . The first wall 242 extends parallel to the front-rear direction K1. The second wall 243 extends leftward B1 from the front end of the first wall 242 .
The lid body 244 is formed in a substantially disc shape. A first wall 242 and a second wall 243 of the base portion 241 project upward from the central portion of the lid 244 .

Four or more through-holes 246 are formed at predetermined intervals in the peripheral portion of the lid 244 . As shown in FIG. 10, a base 215 of the hydraulic oil tank T1 is formed with an opening 216 that is a through hole. A plurality of screw holes (not shown) are formed in the peripheral portion of the opening 216 at the same intervals as the through holes 246 of the lid 244 .
The lid 244 is placed on the upper surface 215u (FIGS. 12 and 13A) of the pedestal 215, and the fastening members 217 (some reference numerals are omitted) such as bolts are inserted through the through holes 246 of the lid 244 to open the opening. 216 is screwed into each screw hole. As a result, the lid 244 is fixed to the upper surface 215u, the opening 216 is closed by the lid 244, and the attachment member 240 is attached to the base 215 of the hydraulic oil tank T1.

Further, by removing the fastening member 217 from each screw hole of the opening 216 and each through hole 246 of the lid 244, the lid 244 is detached from the upper surface 215u of the pedestal 215, and the mounting member 240 is removed from the hydraulic oil tank T1. can be removed. That is, the lid body 244 and the mounting member 240 are detachable from the hydraulic oil tank T1.
A lid body 220 is attached to an opening 214 formed in the lower right portion of the hydraulic oil tank T1 with a structure similar to that described above. Further, the lid body 220 is detachable from the hydraulic oil tank T1.

When the lid 244 is fixed to the pedestal 215 and the mounting member 240 is attached to the hydraulic oil tank T1, the base portion 241 protrudes from the lid 244 to the side opposite to the upper surface 215u of the pedestal 215. As shown in FIG. A battery Bt is arranged between the first wall 242 of the base portion 241 and the tank upper portion 212 and above the tank lower portion 211 . The second wall 243 of the base portion 241 is located forward A1 from the battery Bt.

As shown in FIGS. 14 and 16 , a cylindrical connecting portion 247 is integrally formed in the central portion of the lid 244 of the mounting member 240 . The connecting portion 247 penetrates the lid 244 . One end of the connecting portion 247 protruding upward from the lid 244 is located on the right side B2 of the base portion 241 and is bent obliquely forward right. One end of the hose 232 is connected to one end of the connecting portion 247 as shown in FIGS. 12 and 13A.

14 and 16, the other end of the connecting portion 247 protruding downward from the lid 244 passes through the opening 216 to the lower portion of the tank when the lid 244 is fixed as shown in FIG. It protrudes into the internal space of 211 . A filter (not shown) is attached to the other end of the connecting portion 247 to remove foreign matter mixed in the hydraulic oil.
Hose 232 forms part of hydraulic fluid flow path 230 shown in FIG. The other end of hose 232 is connected to oil cooler Oc (FIG. 9). The internal space of the hose 232, the internal space of the connecting portion 247, and the internal space of the tank lower portion 211 are continuous. The hose 232 constitutes part of a flow path 230 that returns hydraulic fluid from the oil cooler Oc to the hydraulic fluid tank T1. is. An opening 216 in the tank lower portion 211 is an inflow port for returning the hydraulic fluid into the hydraulic fluid tank T1. The opening 216 also serves as a supply port for supplying hydraulic fluid to the hydraulic fluid tank T1.

As shown in FIGS. 14 to 16, the support portion 250 of the mounting member 240 includes a plurality of support plates 248, 249 and support portions 251 to 259 (electric device support portions 251, 253, 255, fuel device support portion 252, 254, tank support 256, hose support 257, second battery support 259).
As shown in FIG. 14 , the first support plate 248 is provided on the upper front surface of the second wall 243 of the base portion 241 so as to be integral with and parallel to the second wall 243 . The first support plate 248 extends left B<b>1 , right B<b>2 and upward from the second wall 243 .

An electrical device support portion (first support portion) 251 is provided integrally with the first support plate 248 at the center of the front surface of the first support plate 248 . That is, the electrical equipment support portion 251 is integrated with the base portion 241 . The electrical device support portion 251 has an upper half portion separated from the first support plate 248 at a predetermined distance, and a through hole 262 penetrating the upper half portion in the front-rear direction K1.
The fuse box 204 is supported on the front side of the first support plate 248 by the electrical equipment support portion 251 as shown in FIGS. 10 and 11 . Specifically, for example, a projection provided on the back surface of the fuse box 204 is passed through the through hole 262 of the electrical device support portion 251, and a fastening member (such as a nut) is attached to a threaded portion formed on the peripheral surface of the projection. (illustration omitted) is screwed. Thereby, the fuse box 204 is fixed to the front surface of the electrical equipment support portion 251 . That is, the fuse box 204 is restrained by the electrical device support portion 251 in three orthogonal axial directions of front and rear, left and right, and up and down.

Also, the electrical equipment support portion 251 is arranged on the negative terminal -bt side of the battery Bt in close proximity thereto. Therefore, the fuse box 204 is also arranged on the side of the negative terminal -bt in close proximity thereto.
As shown in FIGS. 14 to 16 , a fuel device support portion (second support portion) 252 is formed integrally with the first support plate 248 on the front left portion of the first support plate 248 . That is, the fuel equipment support portion 252 is integrated with the base portion 241 . Further, the fuel equipment support portion 252 has a cut 263 and through holes 264 and 265 . The notch 263 is formed with a predetermined length downward from the upper end of the support portion 252 . The through holes 264 and 265 are formed on the left and right sides of the notch 263 (body width direction K2), respectively.

The fuel equipment support portion 252 is inclined forward A1 with respect to the first support plate 248 at a predetermined angle. The left portion of the fuel equipment support portion 252 with respect to the cut 263 is inclined at a predetermined angle rearward A2. Therefore, the left and right portions of the fuel device support portion 252 are displaced from each other in the front-rear direction K1 with respect to the notch 263 .
The second fuel filter 201 is supported on the front side of the first support plate 248 by the fuel device support portion 252 as shown in FIGS. 10 and 11 . Specifically, the second fuel filter 201 is fixed to the front surface of the second support portion 252 by fastening members (not shown) such as bolts and nuts passing through the through holes 264 and 265 of the fuel device support portion 252, respectively. ing. That is, the second fuel filter 201 is constrained by the fuel equipment support portion 252 in three orthogonal axial directions. The inclination and positional displacement of the fuel device support portion 252 described above are for stably supporting each portion of the second fuel filter 201 at a predetermined angle.

In addition, the second fuel filter 201 and the fuse box 204 are supported by the fuel device support portion 252 and the electrical device support portion 251, respectively, while being close to each other on the front side of the mounting member 240. As shown in FIG.
As shown in FIGS. 14 to 16, an electrical device support portion (first support portion) 253 is formed integrally with the first support plate 248 on the right side B2 of the first support plate 248. As shown in FIGS. That is, the electrical equipment support portion 253 is integrated with the base portion 241 . As shown in FIG. 15 , the electric device support portion 253 has extension portions 266 , 267 and 268 , receiving portions 269 and 270 and screw holes 271 and 272 .

The first extension 266 extends forward A1 from the right end of the first support plate 248 . The second extension 267 extends obliquely forward right from the tip of the first extension 266 . The third extending portion 268 extends rightward B2 from the tip of the second extending portion 267 .
The first receiving portion 269 is provided from the right rear surface of the first support plate 248 to the left rear surface of the second extension portion 267 via the right side surface of the first extension portion 266 . Also, the first receiving portion 269 protrudes perpendicularly to the first support plate 248 , the first extending portion 266 and the second extending portion 267 . The second receiving portion 270 vertically protrudes rearward A2 from the rear surface of the right portion of the third extending portion 268 .

The screwing hole 271 is a through hole (reference numeral omitted) formed in the right portion of the first receiving portion 269 and a nut fixed to the lower right portion of the first receiving portion 269 so as to be continuous with the through hole. It consists of a screw hole (reference numeral omitted). The screwing hole 272 is a through hole (reference numeral omitted) formed in the second receiving portion 270 and a screw hole (reference numeral omitted) of a nut fixed to the lower surface of the second receiving portion 270 so as to be continuous with the through hole. ). The axial direction of each screwing hole 271, 272 is parallel to the vertical direction.

The isolator 203 is supported on the right front side of the first support plate 248 by the electrical device support portion 253 as shown in FIGS. 10 and 11 . Specifically, for example, the left and right side portions of the isolator 203 are placed on the upper surfaces of the first receiving portion 269 and the second receiving portion 270 of the electric device support portion 253 . Fastening members (not shown) such as bolts are passed through through holes (not shown) formed in the left and right side portions of the isolator 203 and then screwed into the screw holes 271 and 272 . Thereby, the isolator 203 is fixed to the upper surfaces of the first receiving portion 269 and the second receiving portion 270 of the electrical equipment support portion 253 . That is, the isolator 203 is restrained in the orthogonal three-axis directions by the electrical equipment support portion 253 .

Also, the electrical device support portion 253 is arranged on the negative terminal -bt side of the battery Bt. Therefore, the isolator 203 is also arranged on the negative terminal -bt side.
As shown in FIGS. 14 to 16, the second support plate 249 is provided on the right side of the first wall 242 of the base portion 241 so as to be integral with the first wall 242 and perpendicular to the first wall 242. ing. The second support plate 249 is separated from the second wall 243 and the first receiving portion 269 at a predetermined distance, and extends to the right B2 in the same manner as the first support plate 248 (FIG. 15).

As shown in FIG. 14 , a fuel device support portion (second support portion) 254 is integrally formed with the second support plate 249 on the front surface of the second support plate 249 . That is, the fuel equipment support portion 254 is integrated with the base portion 241 . Further, the fuel device support portion 254 is composed of the front surface of the second support plate 249 and through holes 273 and 274 formed in the second support plate 249 . The through holes 273 and 274 are formed at the right end of the second support plate 249 at predetermined intervals in the vertical direction.

The fuel pump 202 is supported on the front side of the second support plate 249 by the fuel device support portion 254 as shown in FIGS. 10 and 13A. Specifically, for example, the fuel pump 202 is fixed to the front surface of the second support plate 249 by fastening members (reference numerals omitted) such as bolts and nuts that pass through the through holes 273 and 274 of the fuel device support portion 254. . That is, the fuel pump 202 is constrained by the fuel equipment support portion 254 in three orthogonal axial directions.

As shown in FIG. 10, fuel pump 202 is connected to one end of hose 282 and one end of hose 283 . The other end of hose 283 and one end of hose 284 are connected to second fuel filter 201 . The other end of hose 284 is connected to prime mover Eg (FIG. 9). The other end of hose 282 and one end of hose 281 are connected to first fuel filter 208 . The other end of hose 281 is connected to fuel tank T2 (FIG. 9). A fuel flow path 280 is configured by the hoses 281 to 284 as described above.

As shown in FIGS. 10 and 11, the first fuel filter 208 is supported on the front side of the tank upper portion 212 of the hydraulic oil tank T1 by a bracket 218 fixed to the front surface of the tank upper portion 212. As shown in FIG. Bracket 218 is integral with tank top 212 .
As another example, a fuel equipment support portion that supports the first fuel filter 208 may be provided integrally with the base portion 241 of the mounting member 240 or the lid body 244 .

As shown in FIGS. 15 and 16 , an electrical device support portion (first support portion) 255 is formed integrally with the second support plate 249 on the upper rear surface of the second support plate 249 . That is, the electrical equipment support portion 255 is integrated with the base portion 241 . Also, the electrical device support portion 255 protrudes rearward A2 from the rear surface of the second support plate 249 and has a screw hole 275 (FIG. 16). The axial direction of the screwing hole 275 is parallel to the front-rear direction K1.

11 and 12, the timer 205 is supported behind the second support plate 249 by the electrical equipment support portion 255. As shown in FIGS. Specifically, for example, a fastening member (reference numeral omitted) such as a bolt fixed to the timer 205 is screwed into the screw hole 275 of the electric device support portion 255 . Thereby, the timer 205 is fixed to the timer support portion 255 . That is, the timer 205 is restrained in the orthogonal three-axis directions by the electrical equipment support portion 255 .

As shown in FIGS. 14 to 16, a tank support portion (second support portion) 256 is formed integrally with the second support plate 249 on the right side B2 of the second support plate 249. As shown in FIGS. That is, the tank support portion 256 is integrated with the base portion 241 . Also, the tank support portion 256 has a curved beam 276 and a pressing plate 277 . As shown in FIGS. 14 and 16, the bending beam 276 is bent in an S shape. The lower end of the bending beam 276 is fixed to the lower part of the right end of the second support plate 249 . A front surface of the pressing plate 277 is fixed to the upper end portion of the bending beam 276 .

As shown in FIGS. 10 and 13A, the tank support portion 256 supports the reserve tank 206 from the front side. More specifically, the pressing plate 277 of the tank support portion 256 engages with the concave engagement portion 206 a formed on the front surface of the reserve tank 206 . As a result, the reserve tank 206 is pressed from the front side by the pressing plate 277 and does not come into contact with the isolator 203 or other parts of the mounting member 240 . That is, the reserve tank 206 is restrained in the diagonally forward left direction (one direction) by the tank support portion 256 . Note that the reserve tank 206 is fixed to a frame provided inside the airframe 2 by a member different from the mounting member 240 (not shown).

One ends of hoses 301 and 207 are respectively connected to the upper portion of the reserve tank 206 . The other ends of hoses 301 and 207 are connected to radiators of cooling device Rg, respectively. The hoses 301 and 207 constitute the coolant flow path 300 shown in FIG.
As shown in FIGS. 14 to 16, a hose support portion (second support portion) 257 is integrally formed with the first wall 242 at the rear end portion of the first wall 242 of the base portion 241 . That is, the hose support portion 257 is integrated with the base portion 241 . As shown in FIG. 15, the hose support portion 257 is L-shaped. The hose support portion 257 has a right projecting portion (not denoted) projecting parallel to the second support plate 249 on the right side B2 of the first wall 242, and a through hole 278 (FIG. 16) formed in the right projecting portion. have. The axis of the through hole 278 is parallel to the front-rear direction K1.

The hose 207 is supported by the hose support portion 257 as shown in FIGS. 11 and 12 . Specifically, the hose 207 is locked to the hose support portion 257 by, for example, engaging a sleeve-shaped engaging member 227 attached to the hose 207 with the through hole 278 . The engagement member 227 may be hooked on the hose support portion 257 or may be fixed to the hose support portion 257 by inserting a portion of the engagement member 227 into the through hole 278 . As another example, the hose 207 may be fixed to the hose support portion 257 using a string-like engaging member. That is, the hose 207 is restrained by the hose support portion 257 in at least one axial direction out of front and rear, left and right, or up and down.

As shown in FIGS. 14 to 16 , a hose support portion 258 is integrally formed with the second support plate 249 on the right front side of the second support plate 249 . That is, the hose support portion 258 is integrated with the base portion 241 . Also, the hose support portion 258 has a bending beam 290 , an engaging piece 291 and a through hole 292 . As shown in FIG. 14, the bending beam 290 is bent in an S shape. A left end portion of the bending beam 290 is fixed to the front upper portion of the second support plate 249 . The right end of the bending beam 290 is located below the left end. The engaging piece 291 is fixed to the right end of the bending beam 290 and protrudes forward. A through hole 292 is formed in the engaging piece 291 . The axis of the through hole 292 is parallel to the vertical direction.

In the work machine 1, as shown in FIG. 13A, the hose support 258 is a spare support that does not support anything. Accordingly, the hose support portion 258 can support the hose in the vicinity of the hydraulic fluid tank T1, like the hose support portion 257 described above.
FIG. 13B is a front view of the vicinity of the mounting member 240 of another example. For example, when the hose 210 for flowing hydraulic oil is routed above the right portion of the tank lower portion 211 of the hydraulic oil tank T1, the hose 210 can be supported by the hose guide portion 258 .

Specifically, for example, the hose 210 is locked to the hose support portion 258 by engaging the sleeve-shaped engagement member 228 attached to the hose 210 with the through hole 292 of the hose support portion 258 . Further, the hose 210 is guided by the hose support portion 258 so that the tube axis direction of the hose 210 faces a predetermined direction. As another example, a string-like engagement member may be used to secure hose 210 to hose support 258 . That is, the hose 207 is restrained by the hose support portion 258 in three orthogonal axial directions.

The hose 210 is provided in the hydraulic fluid flow path 230 and constitutes the hydraulic fluid flow path 230 . Also, the hose 210 is included in the second equipment and hydraulic equipment in the piping system. As another example, hydraulic equipment other than hose 210 may be supported by hose support 258 . Also, for example, the hose support portion 258 may support an electric wire, a harness, or an electric device provided in an electric circuit, or another device provided in a flow path.

As shown in FIGS. 10 and 12, above the tank lower portion 211 of the hydraulic oil tank T1 and on the right side B2 of the tank upper portion 212, a first battery support portion 219 is integrally formed with the tank upper portion 212 and the tank lower portion 211. It is The first battery support portion 219 supports the positive terminal +bt side end (left end) of the battery Bt arranged above the tank lower portion 211 from below. An insulating member 225 is provided between the first battery support portion 219 and the battery Bt.

As shown in FIGS. 15 and 16 , a second battery support portion 259 is located on the left side B1 of the first wall 242 of the base portion 241 and on the rear side A2 of the second wall 243 . formed integrally with That is, the second battery support portion 259 is integrated with the base portion 241 . Also, the second battery support portion 259 vertically protrudes from the lower portions of the first wall 242 and the second wall 243 and is parallel to the lid 244 .

As shown in FIG. 12, the second battery support portion 259 supports the negative terminal -bt side end (right end) of the battery Bt from below. An insulating member 226 is provided between the second battery support portion 259 and the battery Bt. An insulating member 224 is provided between the walls 242 and 243 of the base portion 241 and the battery Bt. The battery Bt is spaced apart from the tank lower portion 211 and the tank upper portion 212 and insulated from them.

When installing the mounting member 240 described above, the plurality of devices 201 to 207 (the second fuel filter 201, the fuel pump 202, the isolator 203, the fuse box 204, the timer 205, the reserve tank 206, the hose 207), and the battery Bt, For example, first, the attachment member 240 is attached to the hydraulic oil tank T1. Then, the plurality of devices 201 to 207 and the battery Bt are supported by the support portions 251 to 257 and 259 of the mounting member 240, respectively. Also, for example, the isolator 203, the fuse box 204, the fuel pump 202, or the second fuel filter 201 are supported (fixed) by the support portions 253, 251, 254, and 252 of the mounting member 240, and then the mounting member 240 is mounted. It may be attached to the hydraulic oil tank T1.

As another example, the air cleaner 209 and the air flow path 310 shown in FIG. 9 are arranged between the hydraulic oil tank T1 and the prime mover Eg, and a support portion for individually supporting the air cleaner 209 or the air flow path 310 is provided. It may be provided on the mounting member 240 .
In addition, an electrical device support section that supports electrical devices (including harnesses, electric wires, electronic parts, etc.) other than the electrical devices 203, 204, and 205 described above, and fuel devices other than the fuel devices 201, 202, and 208 described above. The mounting member 240 includes a fuel device support portion that supports fuel equipment, a cooling device support portion that supports cooling devices other than the reserve tank 206 described above, and a support portion that supports other devices (including hoses and the like) provided in the flow path. may be set to Further, the mounting member 240 is provided with a support portion for supporting the hydraulic device (the hydraulic device for operating the working device 4 and arranged inside the machine body 2) provided in the hydraulic fluid flow path 230. good too.

Further, a mounting member may be provided that is integrated with the cover that is detachably mounted on the fuel tank T2 and closes the opening of the fuel tank T2. Then, two or more types of equipment among the electric equipment, the fuel equipment, the cooling equipment, the hydraulic equipment, and the like may be attached to the mounting member.
The working machine 1 of this embodiment has the following effects.
First, the configuration and effects related to the lock mechanism 114 will be described below.

A work machine 1 according to the present embodiment includes a machine body 2, a driver's seat 6 provided on the machine body 2, and a control stand 23 provided in front of the driver's seat 6. An operation spindle 34 extending in the width direction, an operation member 41 supported so as to be relatively rotatable with respect to the operation spindle 34 around the axis of the operation spindle 34, and a locked state in which the movement of the operation member 41 is restrained. a lock mechanism 114 that can be switched to an unlocked state that allows movement of the operation member 41; A lock body 126 having an engaged portion (lock pin) 126C that engages with 45R, a lock support shaft 128 that rotatably supports one end of the lock body 126, and a driving force to the other end of the lock body 126. The engaged portion 126C is formed in an intermediate portion between one end and the other end of the lock body 126, and the drive portion 131 imparts a driving force to the lock body 126. As a result, the lock support shaft 128 rotates around its axis, and the engaged portion 126C is engaged with the engaging portions 45L and 45R at the engaging position P1 where the engaged portion 126C is engaged with the engaging portions 45L and 45R. The position can be changed to a detached position P2 to be detached from.

According to the above configuration, the engaged portion 126C is provided in the intermediate portion between the one fixed end and the other free end of the cantilevered locking member 126 . Therefore, compared to the conventional configuration in which the engaged portion 126C is provided at the free end of the lock body 126, the displacement of the engaged portion 126C relative to the engaging portions 45L and 45R and the relative angle deviation are suppressed. , the operation accuracy of the lock mechanism 114 that locks or unlocks the movement of the operation member 41 can be improved.

Further, the driving portion 131 has an interlocking portion 132 which is provided on the operation spindle 34 and rotates integrally with the operation spindle 34, and a connecting member 133 which connects the interlocking portion 132 and the lock body 126. The other end of 126 is connected to a connecting member 133 so as to be relatively rotatable with respect to the connecting member 133 . According to this configuration, the rotational driving force of the operation support shaft 34 can be transmitted to the lock body 126 by the interlocking portion 132 and the connecting member 133 to move the lock body 126 between the engagement position P1 and the disengagement position P2. can.

Further, the lock support shaft 128 is arranged on the rear side of the machine body 2 with respect to the operation support shaft 34 , and the interlocking part 132 is arranged on the front side of the machine body 2 with respect to the operation support shaft 34 , and is connected to the lock body 126 . The member 133 is connected above the operation support shaft 34 . Accordingly, the lock spindle 128 is arranged on either the front side or the rear side of the machine body 2 with respect to the operation spindle 34 , and the interlocking part 132 is arranged on the front side or the rear side of the machine body 2 with respect to the operation spindle 34 . The locking body 126 and the connecting member 133 arranged on the other side may be connected above or below the operation support shaft 34 . According to this configuration, the lock mechanism 114 can be arranged by effectively utilizing the limited space inside the control console 23 .

The engaging portions 45L and 45R protrude from the base portions 44L and 44R of the operating member 41 to the outside in the radial direction of the operating shaft 34 and are recessed toward the operating shaft 34 from the tips of the engaging portions 45L and 45R. It has matching grooves 46L and 46R, the interlocking portion 132 protrudes radially outward and upward from the operation spindle 34, the connecting member 133 is arranged above the operation spindle 34, and the lock spindle 128 is an operation shaft. Arranged below the support shaft 34 and substantially parallel to the operation support shaft 34 , the lock body 126 swings back and forth about the axis of the lock support shaft 128 , and the engaged portion 126</b>C moves the lock body 126 . A lock pin 126C that protrudes from the intermediate portion in the width direction of the body 2 and engages or disengages from the engagement grooves 46L and 46R may be used. According to this configuration, by rotating the lock body 126, the lock body 126 can be easily moved between the position P1 where the lock pin 126C engages with the engagement grooves 45L and 45R and the position P2 where the lock pin 126C disengages from the engagement grooves 46L and 46R. can be repositioned to

Further, the cockpit 23 has a first position X1 that allows the driver to get on and off via a passage provided between the driver's seat 6 and the cockpit 23, and a second position X2 that prevents the driver from getting on and off. The drive unit 131 transmits an operating force for changing the position of the lock lever 50 to the other end of the lock body 126 as a drive force, thereby supporting the lock body 126. It may be rotated around the axis of shaft 128 . According to this configuration, the lock mechanism 114 can be easily switched between the locked state and the unlocked state by operating force applied to the lock lever 50 .

Further, the driving section 131 may have an actuator 139 that generates driving force. According to this configuration, the lock mechanism 114 can be easily switched between the locked state and the unlocked state by driving the actuator 139 .
Further, the work machine 1 operates the work device 4 supported in front of the machine body 2, the travel device 3 supporting the machine body 2 so as to travel, and the control stand 23 operates the work device 4 and the travel device 3, respectively. The operation member 41 may have a plurality of levers, of which the travel lever for operating the travel device 3 may be configured. According to this configuration, the lock mechanism 114 can easily and appropriately switch the travel lever 41 between the locked state and the unlocked state.

Next, the configuration and effects associated with the mounting member 240 will be described below.
The working machine 1 according to the present embodiment includes a machine body 2, a tank (hydraulic oil tank) T1 provided in the machine body 2 and storing liquid, and an opening 216 of the tank T1 which is detachably attached to the tank T1. and a mounting member 240 to which a plurality of devices 201 to 205, 207, and 210 are mounted, and the mounting member 240 and the lid 244 are integrated. According to this configuration, by attaching the lid 244 to the tank T1, the plurality of devices 201 to 205, 207, and 210 attached to the attachment member 240 integrated with the lid 244 can be attached to the tank T1. can. Therefore, it is not necessary to previously fix a boss or the like to the tank T1 for attaching a mounting member such as a bracket to the tank T1 as in the conventional art. It can be attached to T1.

Further, the lid body 244 has four or more through holes 246 formed at predetermined intervals along the peripheral end portion of the lid body 244, and the fastening members 217 inserted through the through holes 246 It is fixed to the tank T1. According to this configuration, since the lid 244 is fixed to the tank T1 by four or more fastening members 217, it is possible to reduce assembly errors of the lid 244 with respect to the tank T1. As a result, it is possible to reduce variations in mounting positions of the devices 201 to 205, 207, and 210 mounted on the mounting member 240 integrated with the lid 244. FIG. The number of through-holes 246 and fastening members 217 is more preferably five or more, and even more preferably six or more.

The tank T1 is a hydraulic oil tank T1 that stores hydraulic oil for operating the working device 4, but instead of the hydraulic oil tank T1, a fuel tank T2 that stores fuel is provided with a lid 244 and a mounting member. 240 may be attached. In general, the hydraulic oil tank T1 and the fuel tank T2 have a highly rigid structure. Therefore, according to the above configuration, variations in the mounting positions of the devices 201 to 205, 207, and 210 mounted on the mounting member 240 can be further reduced.

Also, the plurality of devices 201 to 205, 207, 210 include devices provided in different piping systems or wiring systems. Typically, equipment that is located in different piping or wiring systems is mounted to the fuselage with separate brackets. On the other hand, according to the above configuration, the common mounting member 240 can be used to mount the devices 201 to 205, 207, 210 provided in different piping systems or wiring systems. Therefore, it is possible to improve the positional accuracy of the attachment positions of these devices 201 to 205, 207, and 210. FIG. In addition, the workability of attaching the devices 201 to 205, 207, and 210 can be improved.

In addition, the work machine 1 includes an electric circuit 320 through which an electric current flows, and channels 230, 280, and 300 (a hydraulic oil channel 230, a fuel channel 280, and a cooling liquid channel 300) through which a fluid is circulated. The devices 201 to 205, 207, and 210 include the first devices 203, 204, and 205 provided in the electric circuit 320, the second devices 201, 202, 207, and 210 provided in the flow paths 230, 280, and 300, , and the first device and the second device are attached to the attachment member 240 . According to this configuration, the first devices 203, 204, 205 whose installation positions are restricted by the electric circuit 320, and the second devices 201, 202, 207, 210 whose installation positions are restricted by the flow paths 230, 280, 300 can be easily positioned by the mounting member 240 to improve the workability of mounting them to the tank T1.

In addition, the work machine 1 includes a prime mover Eg configured by an engine mounted on the machine body 2, the passage includes a fuel passage 280 for supplying fuel to the prime mover, and the second device includes the fuel passage 280 The first equipment includes electric equipment 203, 204, 205 through which electric current flows through the electric circuit 320, the fuel equipment 201, 202 and the electric equipment 203, 204, 205 are attached to the mounting member 240 . According to this configuration, the fuel equipment 201, 202 and the electric equipment 203, 204, 205 can be easily positioned by the mounting member 240, and the workability of mounting them to the tank T1 can be improved. Mounting member 240 Further, of the fuel pump 202 and the fuel filters 201, 208 included in the fuel equipment, the fuel pump 202 and the second fuel filter 201 are mounted on the mounting member 240. The fuel equipment 201, 202, At least one of 208 may be attached to attachment member 240 . According to this configuration, at least one of the fuel equipment whose installation position is restricted by the fuel flow path 280 can be easily positioned by the mounting member 240, and the workability of mounting the fuel equipment to the tank T1 can be improved. .

The electrical equipment also includes an isolator 203 that cuts off the current flowing through the electric circuit 320, and a fuse box 204 that contains a fuse that prevents overcurrent from flowing through the electric circuit 320. These are attached to the mounting member 240. , at least one of which may be attached to the mounting member 240 . According to this configuration, the fuse box 204 or the fuse box 204 whose installation position is restricted by the electric circuit 320 can be easily positioned by the mounting member 240, and the workability of mounting them to the tank T1 can be improved. Also, the timer 205 included in the electrical equipment can be easily positioned by the attachment member 240, and the workability of attaching it to the tank T1 can be improved.

Further, the flow path includes a cooling liquid flow path 300 through which the cooling liquid flows, and the cooling device provided in the cooling liquid flow path 300 includes a reserve tank 206 that stores the cooling liquid. , the reserve tank 206 is constrained in one direction, but the mounting member 240 may constrain the reserve tank 206 in two or more directions. According to this configuration, the reserve tank 206 can be easily positioned so as not to interfere with the surrounding equipment 203 and other parts of the mounting member 240, and the workability of mounting the reserve tank 206 can be improved.

The plurality of devices 201 to 205, 207, and 210 include electric devices 203, 204, and 205 provided in an electric circuit 320 through which current flows, fuel devices 201 and 202 provided in a fuel flow path 280, and hydraulic oil flow paths. Two or more types of equipment are included among the hydraulic equipment 210 provided in 230 and the cooling equipment 207 provided in the cooling fluid flow path 300 through which the cooling fluid passes. According to this configuration, the plurality of devices 201 to 205, 207, and 210 whose installation positions are restricted by the electric circuit, fuel flow path 280, hydraulic fluid flow path 230, or coolant flow path 300 can be easily installed by the mounting member 240. By positioning them, the workability of attaching them to the tank T1 can be improved.

Furthermore, the mounting member 240 has a plurality of support portions 251 to 259 that support and constrain the plurality of devices 201 to 207, 210, Bt in at least one direction. A hose support portion 257 for hoses 207 and 210 connected to provided equipment (reserve tank 206, hydraulic oil tank T1, hydraulic equipment, etc.) is included. With this configuration, the plurality of devices 201 to 207, 210, Bt can be easily positioned by the mounting member 240. FIG. In addition, the hoses 207 and 210 can be properly routed inside the body 2 eventually.

Although the present invention has been described above, it should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

Reference Signs List 1 working machine 2 machine body 3 traveling device 4 working device 6 driver's seat 22 aisle 23 control stand 34 operating spindle 41 operating member 41L first traveling lever 41R second traveling lever 44L first base (base)
44R second base (base)
45L first engaging portion (engaging portion)
45R second engaging portion (engaging portion)
46L first engagement groove (engagement groove)
46R second engagement groove (engagement groove)
50 lock lever 114 lock mechanism 126 lock body 126C lock pin (engaged portion)
128 Lock support shaft 131 Driving part 132 Interlocking part 132a Interlocking part 132b Interlocking part 133 Connecting member 139 Actuator A1 Front A2 Rear D Driver K1 Front-back direction K2 Body width direction (body width direction)
P1 Engaged position P2 Disengaged position X1 First position X2 Second position

Claims (7)

Airframe and
a driver's seat provided in the aircraft;
A control platform provided in front of the driver's seat,
The control platform includes an operation spindle extending in the width direction of the airframe,
an operation member supported so as to be relatively rotatable with respect to the operation spindle around the axis of the operation spindle;
A working machine comprising a lock mechanism capable of switching between a locked state that restricts movement of the operating member and an unlocked state that allows movement of the operating member,
The locking mechanism is
an engaging portion that rotates integrally with the operating member;
a lock body having an engaged portion that engages with the engaging portion;
a lock spindle that rotatably supports one end of the lock body;
a drive unit that applies a driving force to the other end of the lock body,
The engaged portion is formed in an intermediate portion between the one end portion and the other end portion of the lock body,
The lock body rotates around the axis of the lock support shaft when a driving force is applied by the drive portion, and moves between an engagement position where the engaged portion is engaged with the engaging portion and the engaged portion. A work machine that is position-changeable between a disengagement position in which an engaging portion is disengaged from the engaging portion. The drive unit
an interlocking part provided on the operating spindle and rotating integrally with the operating spindle;
a connecting member that connects the interlocking portion and the lock body,
2. The working machine according to claim 1, wherein the lock body has the other end connected to the connecting member so as to be relatively rotatable with respect to the connecting member. The lock spindle is arranged on either the front side or the rear side of the airframe with respect to the operation spindle,
The interlocking part is arranged on the other of the front side and the rear side of the aircraft body with respect to the operation spindle,
The working machine according to claim 2, wherein the locking body and the connecting member are connected above or below the operating spindle. The engaging portion has an engaging groove that protrudes radially outward of the operating shaft from a base portion of the operating member and is recessed from a tip of the engaging portion toward the operating shaft,
The interlocking portion protrudes upward in a radial direction outside the operation support shaft,
The connecting member is arranged above the operating spindle,
The lock spindle is arranged below the operation spindle and substantially parallel to the operation spindle,
The lock body swings in the front-rear direction around the axis of the lock support shaft,
4. The working machine according to claim 3, wherein the engaged portion includes a lock pin that protrudes in the width direction of the machine body from the intermediate portion of the lock body and engages or disengages from the engagement groove. The control platform is
A lock lever whose position can be changed between a first position that allows a driver to get on and off via a passage provided between the driver's seat and the control stand and a second position that prevents the driver from getting on and off. death,
The driving portion transmits an operating force for changing the position of the lock lever as the driving force to the other end portion of the lock body to rotate the lock body around the axis of the lock support shaft. Item 5. The work machine according to any one of Items 1 to 4. The work machine according to any one of claims 1 to 4, wherein the driving section has an actuator that generates the driving force. a working device supported in front of the fuselage;
a traveling device that supports the aircraft so that it can travel;
7. The operating member according to any one of claims 1 to 6, wherein the control platform has a plurality of levers for respectively operating the working device and the traveling device, and the operating member constitutes a traveling lever for operating the traveling device. 1. The work machine according to item 1.

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