KR102271408B1 - work vehicle - Google Patents

Abstract

A console box 52 of the turning work vehicle includes a box body 55 and a lock cam 79 . The box main body 55 is rotatable between the 1st attitude|position P1 and the 2nd attitude|position which jumped out from the said 1st attitude|position P1. The lock cam 79 includes a first plate 66 and a cam arm 81 . A cam groove 88 is formed in the first plate 66 . The cam arm 81 rotates integrally with the lock lever 56 . A torsion coil spring 86 for elastically supporting the cam arm shaft 80 is disposed so as to connect the cam arm 81 and the first plate 66 . The cam arm 81 reverses the rotational direction by the elastic force of the torsion coil spring 86 while the guide projection 83 inserted into the cam groove 88 moves along the cam groove 88 . The coil portion of the torsion coil spring 86 is disposed on the side closer to the left and right center of the box body 55 than the first plate 66 .

Description

work vehicle

The present invention relates to a work vehicle having a console box.

Conventionally, in a console box provided with an operation lever of a work vehicle, when an operator moves a lock lever for switching the operation of the operation lever to be effective/ineffective, the posture of the pedestal portion of the operation lever is changed with the operation lever. Configurations that change together are known. Patent Document 1 discloses a work vehicle of this type.

The turning work vehicle disclosed in Patent Document 1 includes a driving operation unit. This driving operation unit has a configuration in which a lever stand equipped with an operation lever including a work lever and a lock lever is provided on the side of the driver's seat so as to be rotatable together with the operation lever.

In Patent Document 1, the work lever is connected to a substantially y-shaped connecting arm in the lever stand. The lock lever is supported so as to be freely rotatable in the vertical direction with respect to the connecting arm. A guide plate is formed on the driver's seat support frame, and the guide plate has an approximately inverted S-shaped guide hole. In this guide hole, a guide pin projecting from the cam is fitted so as to be able to slide freely. This cam rotates integrally with the lock lever. Between the cam and the guide plate, a spring having an elastic force in the tensile direction is erected. By this spring, the lock lever is elastically supported so that it may rotate forward and downward. An elastic support member such as a gas damper is interposed and mounted between the connecting arm and the driver's seat support frame. The elastic support member is elastically supported in the direction in which the connecting arm rotates downward.

The work vehicle of Patent Document 2 is configured to elastically support a lock lever for switching the effective/invalid operation of the operation lever by a torsion coil spring.

In the bulldozer as a construction machine vehicle disclosed by Patent Document 2, a space between the driver's seat and the dashboard is a boarding walk-through area. Lock levers for locking and unlocking the control system of the bulldozer by rotating are formed on both sides of the driver's seat. In position A, where the lock lever crosses the boarding walk-through area, the control system of the bulldozer is unlocked, and in position B where it exits, the control system is locked.

A lever shaft is fixed to the base end of the lock lever, and an intermediate portion of the lever shaft is supported so that it can rotate freely on a bearing fixed to a frame body formed on the vehicle body side. However, this frame body does not rotate. The output lever is fixed to the front end of the lever shaft, and a cam pin is formed at the front end of the output lever. A cam plate is supported by the frame body so that it can rotate freely, and a cam groove into which the cam pin is engaged is formed in this cam plate. The cam plate is connected via a rod to the switching lever of the circuit opening/closing valve mounted through the pilot circuit of the control system. Between the output lever of the lock lever and the frame body, a toggle spring made of a spiral torsion spring is interposed and mounted. This toggle spring positions and elastically supports the lock lever at the said positions A and B.

Japanese Patent Application Laid-Open No. 2009-30248 Japanese Laid-Open Patent Publication No. 2002-173952

In the configuration of Patent Document 1, the lock lever is elastically supported by a spring having an elastic force in the tension direction. Therefore, if such a type of spring is to be placed inside the lever stand, a large space must be secured inside the lever stand in consideration of the deformation of the spring. application becomes particularly difficult.

In the structure of patent document 2, a torsion coil spring is arrange|positioned so that it may connect between the output lever of a lock lever, and a frame body. Therefore, it is difficult to downsize the configuration including the frame body, the cam plate, the output lever, and the torsion coil spring, and there is room for improvement in this respect.

The present invention has been made in view of the above circumstances, and an object thereof is to realize a compact configuration for elastically supporting a lock lever in a console box.

The problems to be solved by the present invention are as described above, and next, means for solving the problems and their effects will be described.

According to an aspect of the present invention, the following configuration of a work vehicle having a console box is provided. That is, the console box includes a box body, an operation lever, a lock lever, an elastic support member, and a lock cam. The said box main body is rotatable between a 1st attitude|position and the 2nd attitude|position which jumped out from the said 1st attitude|position. The operation lever is arranged to protrude from the box body. The lock lever is disposed to protrude from the box body and is rotatable. The elastic support member elastically supports the box body toward the second posture side. The said lock cam locks rotation of the said box main body in both the said 1st attitude|position and the said 2nd attitude|position. The lock cam includes a guide member and a cam arm. A cam groove is formed in the guide member. The cam arm rotates integrally with the lock lever. The cam arm has an insertion part inserted into the cam groove. A torsion coil spring for elastically supporting the cam arm is disposed so as to connect the cam arm and the guide member. The cam arm reverses the rotational direction by the elastic force of the torsion coil spring while the insertion part moves along the cam groove. The coil portion of the torsion coil spring is disposed on a side closer to the left and right center of the box body than the guide member.

Thereby, by using the torsion coil spring which can implement|achieve a large stroke while suppressing the magnitude|size of the spring itself, the space inside a box main body can be utilized effectively. As a result, compactness of the console box becomes easy.

In the above-mentioned work vehicle, it is preferable to set it as the following structure. That is, the cam arm includes a plate-shaped arm body and a central protrusion. The said arm main body is arrange|positioned on the side closer to the right and left center of the said box main body than the said guide member. The center-side protrusion protrudes from the arm body toward a side closer to the left and right center of the box body. One end of a spring wire of the torsion coil spring is mounted to the guide member, and the other end is mounted to the central protrusion.

Thereby, the arm main body of a cam arm is brought close to a guide member, and while effectively utilizing the space inside a box main body, a cam arm can be elastically supported by the torsion coil spring with high space saving property.

In the above-mentioned work vehicle, the coil portion of the torsion coil spring includes the spring wire attached to the guide member, both when the box body is in the first posture and in the second posture. It is preferable to be above the position.

Thereby, since the spring wire extends downward with respect to the guide member and becomes a form to be connected, in the box body, it is possible to prevent the coil portion of the torsion coil spring from interfering with other components easily. As a result, a compact configuration can be realized.

At least the following technical ideas can be grasped|ascertained from the indication of this specification other than said invention.

[1] The work vehicle includes an operation lever, a control box, and a traveling speed stage switching device. The operation lever is disposed on each of the left and right sides of the driver's seat. The control box is formed in an upwardly projecting shape on a floor surface in front of the driver's seat. The traveling speed stage switching device is operated so that an operator switches the traveling speed stage. The traveling speed stage switching device is provided above the control box.

In this way, by providing the traveling speed stage switching device at a position where the operator sitting in the driver's seat can visually recognize, the operator can easily confirm the operation state of the high speed stage/low speed stage. Further, by disposing the traveling speed stage switching device in the control box in front of the driver's seat, the operator can switch the traveling speed stage with either left or right hand, thereby improving the degree of freedom of operation.

In the above-mentioned work vehicle, it is preferable that a display device for displaying an operation state of the traveling speed stage switching device is disposed in the control box.

Thereby, the visibility of the switching state of a traveling speed stage can further be improved.

In the above-mentioned work vehicle, it is preferable to set it as the following structure. That is, this work vehicle is provided with the traveling lever arranged in the said control box. The traveling speed stage switching device is disposed at a position deviated from the traveling lever in the left-right direction of the control box.

Thereby, an operator can operate a traveling speed stage switching device with the other hand, operating a traveling lever with one hand. That is, the convenience of both-hand operation can be improved.

In the above-mentioned work vehicle, it is preferable to set it as the following structure. That is, this work vehicle is provided with the 1st port and 2nd port for driving an attachment work machine, and a foot pedal. The foot pedal is used by an operator to operate the attachment working machine with a foot. When the foot pedal is operated to one side from the neutral position, hydraulic oil is supplied to the first port, and when the foot pedal is operated to the opposite side, hydraulic oil is supplied to the second port.

Thereby, for example, when the attachment working machine is provided with the double-acting cylinder, the said double-acting cylinder can be operated by stepping on one foot pedal to one side/the other side. Accordingly, it is possible to realize a feeling of intuitively easy to understand operation.

[2] The work vehicle includes a bonnet, a console box, a lock portion, and a safety device. The bonnet is rotatably supported about a rotating shaft disposed at the rear of the engine, covers the engine, and can be opened and closed. The console box has an operation lever operated by an operator, is rotatably supported with respect to the bonnet, and is switchable from a first posture to a second posture by rotating in the same direction as a rotational direction for opening the bonnet; By rotating in the direction of , it is possible to switch from the second posture to the first posture. The lock part makes the operation of the operation lever effective when the console box is in the first posture and the bonnet is in a closed state, and invalidates the operation of the operation lever when other than that. The safety device prevents opening and closing of the bonnet when the console box is in the first posture, and allows opening and closing of the bonnet when the console box is in the second posture.

Thereby, it is possible to open the bonnet in the state which made the console box in the 2nd attitude|position, and maintenance of an engine etc. can be performed with this. Then, when the bonnet is in the open state or when the console box is in the second posture, the operation of the work machine is invalidated by the lock unit. Accordingly, for example, when the bonnet is opened while the engine is running to perform maintenance of the hydraulic circuit, or the like, even when the operation lever is unexpectedly touched, it is possible to prevent the corresponding operation from being performed. Moreover, by a safety device, it can ensure that the console box is in the 2nd attitude|position at the time of opening and closing of a bonnet. Accordingly, it is possible to reliably prevent the operation of the work vehicle by coming into contact with the operation lever when the bonnet is opened and closed.

In the above-mentioned work vehicle, it is preferable to set it as the following structure. That is, this work vehicle is provided with a driver's seat. The said safety device is provided with a post and a regulating part. The posts are arranged in pairs at intervals in the width direction of the driver's seat. The regulating unit connects the posts to each other. Let the distance between the rotation center of the said bonnet and the front-end|tip of the said operation lever in the said 1st attitude|position be a radius, and consider the 1st imaginary circle centering on the rotation center of the said bonnet as a center. Moreover, let the distance between the rotation center of the said bonnet and the front-end|tip of the said operation lever in the said 2nd attitude|position be a radius, and consider the 2nd imaginary circle centering on the rotation center of the said bonnet as a center. At this time, at least a part of the said regulating part is arrange|positioned inside the said 1st virtual circle. All of the said regulating part is arrange|positioned outside the said 2nd imaginary circle.

Thereby, when the console box is in the 1st attitude|position, rotation of the bonnet is blocked|prevented because an operation lever touches a control part. Therefore, it is possible to reliably prevent the bonnet from being opened and closed in the state where the console box is in the first posture.

In the above-mentioned work vehicle, it is preferable to set it as the following structure. That is, consider a third virtual circle having a radius of the center of rotation of the console box and a distance between the front end of the operating lever and a center of rotation of the console box in a state where the bonnet is closed. At this time, all of the said regulating parts are arrange|positioned outside the said 3rd virtual circle.

Thereby, in the state in which the bonnet is closed, since a regulating part does not interfere when changing the attitude|position of a console box, a series of operation|work for opening and closing of a bonnet can be performed smoothly.

In the above-mentioned work vehicle, it is preferable that the regulating portion is formed so as to be forward as it approaches the connection point from the longitudinal middle portion to the post road.

Thereby, space can be ensured around the operator who sits in the driver's seat, and comfort can be improved.

[3] The work vehicle includes a bonnet, a first handle, and a second handle. The bonnet is rotatably supported about a rotating shaft located at the rear of the engine, covers the engine, and can be opened and closed. The first handle is disposed on the front surface of the bonnet. The second handle is disposed on the bonnet at a position higher than the first gripping portion.

Thereby, the bonnet can be opened and closed using both hands while holding the two handles one by one. Therefore, the opening and closing operation of the bonnet can be performed easily and smoothly. Accordingly, even when it is difficult to provide an auxiliary device elastically supported in the bonnet opening direction, maintenance properties of the engine or the like can be improved.

In the above-mentioned work vehicle, it is preferable to set it as the following structure. That is, this work vehicle is provided with a driver's seat mounted on the upper surface of the bonnet. At least a portion of the second handle may be accommodated in a space formed between the bonnet and the driver's seat.

Accordingly, when it is not necessary to put a hand on the second handle, it can be stored in a place that does not interfere.

The above work vehicle may have the following configuration. That is, the second handle is a flexible, elongated band-like body. Both longitudinal ends of the second handle are mounted on the bonnet, and the middle part is receivable in the space.

Thereby, the simple and low-cost structure in which the 2nd handle can be accommodated can be implement|achieved.

In the above-described work vehicle, the second handle may be slidably movable, and may be configured to be accommodated in the space by moving to one side.

Thereby, it is a simple operation which slides a 2nd handle, and can be accommodated as needed.

In the above-mentioned work vehicle, it is preferable to set it as the following structure. That is, this work vehicle is provided with a locking mechanism capable of being locked in the closed state of the bonnet and capable of releasing the lock by operating the first handle. The lock mechanism is unlocked by an operating force for operating the first handle in a direction for opening the bonnet.

Thereby, since the lock can be released by the operating force in the direction which opens the bonnet, the bonnet can be opened without taking time to release the lock.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the whole structure of the turning work vehicle which concerns on one Embodiment of this invention.
Fig. 2 is a perspective view illustrating a change in posture of the console box;
Fig. 3 is a perspective view of the console box in the first posture viewed from the side;
Fig. 4 is a perspective view of the console box in the first posture as seen from the back;
Fig. 5 is a perspective view of the console box in the second posture viewed from the side;
Fig. 6 is a side view showing the configuration of the turning work vehicle;
Fig. 7 is a perspective view showing the configuration of a turning work vehicle;
It is a figure which shows typically the hydraulic circuit of a turning work vehicle.
Fig. 9 is a partially enlarged view showing the configuration of a travel speed stage changeover switch;
Fig. 10 is a perspective view of the turning working vehicle as seen from the rear side.
It is a conceptual diagram explaining the lock function which nullifies the operation by the operation operation lever by the solenoid valve.
12 is a side view for explaining a change in posture of the console box and opening and closing of the bonnet;
Fig. 13 is a perspective view of the work vehicle as viewed obliquely from above;
Fig. 14 is a perspective view of the lock release handle and the belt of the first embodiment as seen from the front side;
It is a side schematic diagram explaining the function of a bonnet stay.
It is a perspective view which shows the retractable handle of 2nd Embodiment.

Next, with reference to drawings, embodiment of this invention is described. 1 : is a side view which shows the whole structure of the turning work vehicle 1 which concerns on one Embodiment of this invention.

A turning work vehicle (work vehicle) 1 shown in FIGS. 1 and 6 is a small backhoe, and mainly includes a lower traveling body 11 and an upper turning body 12 .

The lower traveling body 11 includes a crawler traveling device 21 arranged in a pair of left and right, and a hydraulic motor 22 for driving the crawler traveling device 21 . The hydraulic motor 22 is provided in each of the crawler traveling apparatuses 21 on the left and right, as shown in FIG. The undercarriage 11 drives the left and right crawler traveling devices 21 individually in various directions and at various speeds to perform various traveling such as straight forward or backward, steering, and the like.

The upper revolving body 12 includes a revolving frame 31 , an engine 33 , a hydraulic pump unit 34 , a bonnet 38 , a control unit 35 , and a working device 13 . .

The turning frame 31 is arrange|positioned above the lower traveling body 11, and is supported by the lower traveling body 11 rotatably centering on a vertical axis|shaft. The swing frame 31 can rotate with respect to the lower traveling body 11 by driving the swing motor 32 . The engine 33 is comprised, for example as a diesel engine, and is arrange|positioned at the rear part of the revolving frame 31. The hydraulic pump unit 34 is driven by the engine 33 and generates hydraulic force necessary for the traveling and work of the turning work vehicle 1 .

The bonnet 38 covers and protects the upper surface of the engine 33 and the like. As shown in FIG. 10, the rear part of the bonnet 38 is connected with the turning frame 31 by the hinge part 245 arrange|positioned in the rear part of the turning frame 31 in a pair of right and left.

Thereby, the bonnet 38 can be rotated with respect to the revolving frame 31 centering on the rotating shaft 245c arrange|positioned in the left-right horizontal direction. Specifically, by rotating the bonnet 38 backward and upward, it can be made into an open state, and can be made into a closed state by rotating it in the opposite direction.

The control unit 35 includes a driver's seat 39 on which the operator sits, a control box 152 installed upright in front of the driver's seat 39 , and various operating members. On this operation member, a pair of left and right are arranged and travel operation levers (travel levers) 36L and 36R supported by the operation box 152, and operation operation levers 65 provided on both left and right sides of the driver's seat 39, respectively. , a travel speed stage changeover switch (travel speed stage changeover device) 155 , and a pedal (foot pedal) 156 for taking power, and the like. In the present embodiment, the operation operation lever 65 corresponds to the operation lever. The operator can give various instructions to the turning work vehicle 1 by operating said operation member.

The control box 152 is provided so that it may protrude upward from the floor surface in front of the driver's seat 39, as shown in FIG. On the upper surface thereof, a travel speed stage changeover switch 155, travel operation levers 36L and 36R, and various display devices are arranged.

The traveling operation levers 36L and 36R are arranged side by side on the upper surface of the control box 152 on the side close to the driver's seat 39 and on the left and right central portions in the left-right direction. The two travel operation levers 36L and 36R are disposed adjacent to each other in the left-right direction, and are supported so as to project upwardly from the upper surface of the operation box 152 . The operator can instruct forward or backward movement of the crawler traveling apparatus 21 on the left and right by knocking down the left and right travel operation levers 36L and 36R forward or backward.

The traveling speed stage changeover switch 155 is constituted by an electric switch, specifically, a rocker switch in which the axis of the fulcrum points in the left-right direction. The operator can switch the attitude|position of the said switch like a seesaw by pressing the edge part of the traveling speed stage changeover switch 155. When the traveling speed stage changeover switch 155 is set to the back-down posture, the contact is in the closed ON state, and when it is set to the forward-retracting posture, the contact is in the open OFF state. The operator instructs the high speed stage (second speed) by turning the traveling speed stage changeover switch 155 into the ON state, and instructs the low speed stage (1st speed) by turning it OFF.

The power take-off pedal 156 is arranged slightly above the floor surface in front of the driver's seat 39 and on the left side of the control box 152 . In order to drive the attachment work machine (for example, the attachment for mowing) of the figure not shown, the pedal 156 for power extraction is operated by an operator stepping on it. A first port 181 and a second port 182 for supplying hydraulic oil for driving the attachment working machine are formed at an appropriate position of the turning work vehicle 1 . In this embodiment, the 1st port 181 and the 2nd port 182 are arrange|positioned in the boom 41 in the work apparatus 13 mentioned later, as shown in FIG.

The power take-off pedal 156 displaces the directional switching valve included in the turning working vehicle 1 in order to switch the direction of hydraulic oil via a link mechanism (not shown) including an arm and a rod. In addition, the detail of a directional switch valve is mentioned later. Thereby, hydraulic oil can be discharged from either of the 1st port 181 and the 2nd port 182 in association with each operation of an operator stepping on the pedal 156 for power extraction to the front side/rear side.

The working device 13 includes a boom 41 , an arm 42 , a bucket 43 , a boom cylinder 44 , an arm cylinder 45 , and a bucket cylinder 46 . A hydraulic cylinder is respectively connected to the boom 41 , the arm 42 , and the bucket 43 , and various operations such as excavation with the bucket 43 can be performed by expanding and contracting the hydraulic cylinder.

The boom 41 is comprised as an elongate member, and the edge part is rotatably supported by the front part of the upper revolving body 12. FIG. A boom cylinder 44 is attached to the boom 41 , and when the boom cylinder 44 expands and contracts, the boom 41 can be rotated.

The arm 42 is comprised as an elongate member, and the edge part is rotatably supported by the front-end|tip part of the boom 41. As shown in FIG. An arm cylinder 45 is attached to the arm 42 , and when the arm cylinder 45 expands and contracts, the arm 42 can be rotated.

The bucket 43 is configured as a member formed in the shape of a container, and the end thereof is rotatably supported by the front end of the arm 42 . A bucket cylinder 46 is attached to the bucket 43 , and when the bucket cylinder 46 expands and contracts, the bucket 43 is rotated and a floating operation/dump operation can be performed.

Next, the hydraulic circuit with which the turning work vehicle 1 of this embodiment is equipped is demonstrated. 8 : is a figure which shows typically the hydraulic circuit of the turning work vehicle 1 .

As shown in FIG. 8 , the hydraulic pump unit 34 includes two variable displacement hydraulic pumps 34a and 34b and an auxiliary hydraulic pump 34c. The turning work vehicle 1 includes a first hydraulic circuit 9a and a second hydraulic circuit 9b. Hydraulic oil is supplied to the first hydraulic circuit 9a from the hydraulic pump 34a on one side, and hydraulic oil is supplied to the second hydraulic circuit 9b from the hydraulic pump 34b on the other side.

A hydraulic motor 22L for driving the crawler traveling device 21 disposed on the left side of the vehicle body is connected to the first hydraulic circuit 9a. A directional selector valve 191 is disposed between the hydraulic motor 22L and the discharge port of the hydraulic pump 34a.

A hydraulic motor 22R for driving the crawler traveling device 21 disposed on the right side of the vehicle body and an attachment cylinder 90 for driving the attachment working machine are connected to the second hydraulic circuit 9b. The attachment cylinder 90 becomes a double-acting cylinder, and is connected to the 1st port 181 and the 2nd port 182 mentioned above. Between the discharge port of the hydraulic pump 34b, the hydraulic motor 22R, and the attachment cylinder 90, the direction switching valves 192 and 93 are arrange|positioned, respectively.

In addition, although abbreviate|omitted in FIG. 8, another hydraulic actuator for driving the working device 13 etc. is connected to the 1st hydraulic circuit 9a and the 2nd hydraulic circuit 9b.

In each of the directional selector valves 191 and 192 connected to the left and right hydraulic motors 22L and 22R, the spool moves the hydraulic motors 22L and 22R by displacing to one side from the neutral position where the supply of hydraulic oil is stopped. It rotates forward and reverses by displacing to the other side.

Each of the pair of travel operation levers 36L and 36R can individually instruct forward, backward, and stop of the left and right crawler traveling devices 21 . The operator instructs forward movement by knocking forward the travel operation levers 36L and 36R from the neutral position, and instructs backward movement by knocking backwards.

The turning work vehicle 1 is provided with travel operation lever remote control valves 95L and 95R arranged corresponding to a pair of travel operation levers 36L and 36R. Each travel operation lever remote control valve (95L, 95R) has two output ports, and sends hydraulic oil of pressure according to the operation amount to the port according to the operation direction (forward/reverse) of the travel operation lever (36L, 36R). can The pilot pressure output from the travel operation lever remote control valves 95L and 95R is derived from the pilot ports of the directional selector valves 191 and 192 described above. Accordingly, the spools of the directional selector valves 191 and 192 are displaced by the direction and amount in accordance with the traveling direction and traveling speed indicated by the traveling operation levers 36L and 36R, and thereby the hydraulic motors 22L and 22R are displaced. , can be rotated at a direction and speed based on the operator's instructions.

Further, the spool of the directional selector valve 93 is connected to the power take-off pedal 156 via the above-described link mechanism. Accordingly, the spool of the directional selector valve 93 is displaced by a direction and an amount corresponding to the direction and the amount of operation indicated by the power take-off pedal 156, thereby causing the attachment cylinder 90 to move according to the operator's instruction. It can be operated in both directions and quantities.

As shown in FIG. 8 , the hydraulic pump unit 34 includes an auxiliary hydraulic pump 34c that adjusts the output of the hydraulic motor 22 in addition to the hydraulic pumps 34a and 34b described above. This auxiliary hydraulic pump 34c can supply hydraulic oil to the swash plate drive mechanism for adjusting the angle of each movable swash plate of the hydraulic motors 22L, 22R. However, between this drive mechanism and hydraulic motors 22L, 22R, the solenoid valve 194 for switching supply/disconnection of hydraulic oil is arrange|positioned.

The solenoid valve 194 is electrically connected to the traveling speed stage changeover switch 155 . When the operator operates the traveling speed stage changeover switch 155 to turn on the ON state, the solenoid valve 194 opens, and when it is turned OFF, the solenoid valve 194 closes the valve.

Since the solenoid valve 194 is closed when the traveling speed stage changeover switch 155 is OFF, the hydraulic oil from the auxiliary hydraulic pump 34c is not sent to the swash plate drive mechanism. In this case, the inclination angle of the movable swash plate in the hydraulic motor 22 becomes large, and the hydraulic motor 22 is driven at the speed corresponding to 1 speed.

When the traveling speed stage changeover switch 155 is turned on, the solenoid valve 194 is opened, so that the hydraulic oil from the auxiliary hydraulic pump 34c is sent to the swash plate drive mechanism. Thereby, the inclination angle of the movable swash plate in the hydraulic motor 22 becomes small, and the hydraulic motor 22 is driven at the speed corresponding to 2 speed.

Next, the travel speed stage changeover switch 155 of the turning work vehicle 1 of this embodiment is demonstrated in detail. 9 is a partially enlarged view showing the configuration of the travel speed stage changeover switch 155 .

The travel speed stage changeover switch 155 is arrange|positioned rather than the travel operation lever 36L in the width direction (left-right direction of a vehicle body) of the control box 152, as shown in FIG.7 and FIG.9. That is, in the left-right width direction of the control box 152, the traveling operation levers 36L, 36R and the traveling speed stage changeover switch 155 are arrange|positioned at the mutually shifted position. Thereby, it is possible for the operator to operate the travel speed stage changeover switch 155 with the left hand while operating the travel operation levers 36L and 36R with the right hand. Further, the travel speed stage changeover switch 155 may be disposed on the right side of the travel operation lever 36R.

The traveling speed stage changeover switch 155 is located on the left side of the upper surface of the control box 152 and is located at a position slightly close to the center portion. Thereby, the traveling speed stage changeover switch 155 can be easily operated with either the left or right hand of the operator.

And as shown in FIG. 9, in the upper surface (surface) of the traveling speed stage changeover switch 155, the ON mark is displayed on the rear side, and the OFF mark is displayed on the front side. Thereby, the operator can easily confirm which one is pressed to switch the traveling speed stage changeover switch 155 to an ON state/OFF state.

Moreover, as shown in FIG. 9, the light transmission part 157 is formed in the side corresponding to the ON state on the surface of the traveling speed stage changeover switch 155. As shown in FIG. A lamp (display device) 58 is provided inside the traveling speed stage changeover switch 155 at a position corresponding to the light transmitting portion 157 . The lamp 58 can be configured to light when the travel speed stage changeover switch 155 is turned on, for example. Thereby, the operator can easily confirm the ON/OFF state of the said traveling speed stage changeover switch 155 even in a dark environment (for example, at night).

On the upper surface of the traveling speed stage changeover switch 155, a small figure (icon) indicating a high speed is drawn at the position of the light transmitting portion 157 . Thereby, the correspondence between the attitude|position of the travel speed stage changeover switch 155 and a travel speed stage can be easily shown to an operator. Moreover, since the icon floats by light in the lighting state of the lamp 58, an operator can confirm the ON/OFF state of the traveling speed stage changeover switch 155 more easily.

As described above, in the present embodiment, since the speed stage is switched by the travel speed stage changeover switch 155, it is not necessary to assign the speed stage changeover operation to the power take-off pedal 156. . Therefore, when an attachment working machine using a double-acting hydraulic actuator is mounted on the turning work vehicle 1 by the combination of the traveling speed stage changeover switch 155 and the power take-off pedal 156, the power take-off pedal ( 156) to the front side, the attachment working machine is driven to one side, and it is possible to realize a simple operation in which the attachment working machine is driven to the other side when stepped on the other side.

Next, the console box 52 provided with the said operation operation lever 65 is demonstrated.

The driver's seat 39 for an operator to sit is arrange|positioned in the right and left center of the upper surface of the upper revolving body 12. FIG. However, in FIG. 13, in order to show the belt 372 etc. which will be described later in an easy-to-understand manner, the driver's seat 39 is drawn with a chain line. And the console box 52 is arrange|positioned in a pair of right and left so that the driver's seat 39 may be pinched|interposed. The driver's seat 39 and the console box 52 are arrange|positioned on the upper surface of the bonnet 38 with which the upper revolving body 12 is equipped.

As shown in FIG. 2 , the console box 52 includes a box main body 55 , the above-described work operation lever 65 , a lock lever 56 , and an arm rest 57 . The console box 52 supports the above-mentioned work operation lever 65 and the lock lever 56 .

The box main body 55 is comprised in the hollow shape, and covers and protects various mechanisms (For example, the lock cam 79, the pilot valve 77, the electric switch 94 mentioned later, etc.) arrange|positioned inside. .

As shown in FIG. 10 , in each of the left and right console boxes 52 , a pilot valve 77 is disposed inside the box main body 55 . As shown in FIG. 11, the pilot valve 77 on either side is equipped with one input port and four output ports.

The discharge port of the hydraulic pump with which the hydraulic pump unit 34 mentioned above is equipped is connected to the input port of the pilot valve 77 via piping (not shown). However, as shown in FIGS. 10 and 11, the solenoid valve (lock part) 264 with which the turning work vehicle 1 is equipped is arrange|positioned in the path|route of the hydraulic oil which connects between this hydraulic pump and the pilot valve 77. has been As shown in FIG. 11 , a relief valve for releasing a pressure is disposed between the hydraulic pump of the hydraulic pump unit 34 and the solenoid valve 264 .

As shown in FIGS. 10 and 11 , the output port of the pilot valve 77 is connected to a control valve 284 included in the turning work vehicle 1 via piping (not shown). The pilot valve 77 opens and closes between an input port and each output port according to an operator operating the operation|work operation lever 65 back-and-forth right and left. When the output port is opened, hydraulic oil is sent from the pilot valve 77 to the control valve 284 .

As conceptually shown in FIG. 11, the control valve 284 is provided with the some spool for switching the drive/stop of the hydraulic actuator with which the working device 13 etc. are equipped. The control valve 284 uses the hydraulic oil sent from the pilot valve 77 as a pilot pressure to displace the spool, thereby moving the hydraulic actuator, turning the upper revolving body 12 , and various operations using the working device 13 . can be carried out.

Although detailed later, as shown in FIG. 10, the box main body 55 is interposed with the support shaft 69 arrange|positioned in the left-right direction with respect to the below-mentioned base member 60 fixed to the upper surface of the bonnet 38. As shown in FIG. It is rotatably supported. When the operator appropriately operates the lock lever 56, the posture of the console box 52 is switched between the first posture P1 indicated by the solid line in FIGS. 2 and 12 and the second posture P2 indicated by the chain line. can do.

In the state where the bonnet 38 is closed, the first posture P1 of the console box 52 is a substantially horizontal posture, and is a normal posture when the operator operates the work operation lever 65 . When the second posture P2 is a posture that jumps backward from the first posture P1, and the operator temporarily retracts the console box 52 backward and upward when getting on and off the turning work vehicle 1 used, etc. The direction of rotation for switching the console box 52 from the first posture P1 to the second posture P2 coincides with the direction of rotation when the bonnet 38 in the closed state is opened.

The console box 52 is provided with a cam mechanism to be described later, and in any of the first posture P1 and the second posture P2 described above, the console box 52 is moved with respect to the bonnet 38 from the posture. Rotation can be regulated so that it does not rotate suddenly. As this cam mechanism, arbitrary cams, such as a groove cam, can be used, for example.

The work operation lever 65 and the lock lever 56 are arranged so as to protrude from the box body 55 . The work operation lever 65 is disposed above the console box 52 and protrudes obliquely forward and upward. By operating the work operation lever 65 , the operator can give an instruction regarding the operation of the work device 13 or the turning of the upper revolving body 12 .

The lock lever 56 is arrange|positioned at the front lower part of the console box 52, and protrudes diagonally forward and upward. This lock lever 56 is operated to change the posture of the console box 52 . The lock lever 56 is supported by the box main body 55 so that it may be rotatable centering on the axis|shaft of the left-right horizontal direction. By rotating the lock lever 56, the operator releases the rotation restriction by the cam mechanism, and moves the box body 55 between the first posture P1 and the second posture P2 (in other words, , the console box 52) can be rotated.

Although the details will be described later, in the hydraulic circuit included in the turning work vehicle 1 , a lock function for invalidating the operation of the work operation lever 65 when the console box 52 is in the second posture P2 is formed. has been Thereby, even if an operator's hand or the like accidentally touches the work operation lever 65 of the console box 52 in the second posture P2, it is possible to prevent an unexpected operation accompanying it from occurring. This lock function, for example, when the second posture P2 of the console box 52 is detected by a sensor or the like with respect to the pilot valve 77 that opens and closes in response to the operation of the work operation lever 65, the hydraulic oil This can be realized by controlling to cut off the supply of

An operator riding on the turning work vehicle 1 operates the work operation lever 65 with the console box 52 in the first posture P1 . On the other hand, when the operator raises and lowers the turning work vehicle 1, by setting the console box 52 to the second posture P2, it can be retracted so as not to interfere with the operator's body.

The left and right console boxes 52 have a configuration symmetrical to each other, and the configuration is substantially the same. Therefore, below, the console box 52 on the left side as seen from the operator seated on the driver's seat 39 is demonstrated representatively.

3 : is the perspective view which looked at the console box 52 of the 1st attitude|position P1 from the side, FIG. 4 : is the perspective view seen from the back. 5 : is the perspective view which looked at the console box 52 of the 2nd attitude|position P2 from the lateral side. 3 to 5, in order to show the internal structure of the console box 52 in detail, the box main body 55 is drawn transparently by the chain line.

As shown in FIG. 3 etc., the console box 52 mainly consists of the base member 60, the support shaft 69, the main arm 70, the 1st reinforcement member 71 other than the said structure. , a second reinforcing member 72 , a mount plate 75 , a cam arm shaft 80 , a cam arm 81 , and a torsion coil spring 86 .

As shown in FIG.3 and FIG.4, the base member 60 is formed as the member which bent the plate-shaped member into the substantially U-shape as seen from the back. The base member 60 has a certain width in the left-right direction, and the front and upper sides of the inner space are open.

Hereinafter, unless otherwise specified, in the configuration of the console box 52 in the left-right direction, the inner side means a side close to the center (left-right direction center) dividing the width of the base member 60 into two, and the outer side means, It means the side farther from the center of the above. The center of the width direction of the base member 60 substantially coincides with the center of the box body 55 in the width direction.

The base member 60 includes a bottom plate 64 , a first plate (guide member) 66 , and a second plate 67 . The base plate 64 is fixed with the bolt which is a fastening member with respect to the upper surface of the bonnet 38 shown in FIG. As shown in FIG. 3, the 1st board 66 is formed so that it may rise perpendicularly|vertically from the edge part of the left and right one side of the baseplate 64. As shown in FIG. A cam groove 88 is formed in the first plate 66, which will be described later in detail. As shown in FIG. 4, the 2nd board 67 is formed so that it may rise perpendicularly|vertically from the edge part of the other left and right side of the baseplate 64. As shown in FIG. The upper end of the second plate 67 is lower than the height of the first plate 66 .

A rear plate 63 is fixed to the rear portion of the base member 60 . A first support plate 61 is fixed to the back plate 63 . The 1st support plate 61 is arrange|positioned above the 2nd plate 67, and is facing the 1st plate 66 and the left-right direction.

A support shaft 69 is rotatably supported between the first plate 66 and the first support plate 61 . The support shaft 69 is an elongate cylindrical member, and is arrange|positioned toward the left-right direction with the longitudinal direction. This support shaft 69 serves as a rotation shaft of the box body 55 (further, a console rotation body described later) described above.

As shown in FIG. 4 etc., the main arm 70 is being fixed to the edge part on the far side from the 1st plate 66 in the support shaft 69. As shown in FIG. The main arm 70 is formed as a plate-shaped member of a substantially inverted V-shape in side view. A first reinforcing member 71 for increasing rigidity is fixed to a surface of the main arm 70 facing the first plate 66 . The arm rest 57 described above is attached to the first reinforcing member 71 .

The main arm 70 and the above-mentioned second plate 67 are connected by a gas damper 74 as an elastic support member. The gas damper 74 acts on the main arm 70 with an elastic force in the extending direction. Therefore, the elastic force which rotates the main arm 70 upward centering on the support shaft 69 is acting on the main arm 70. As shown in FIG.

A mount plate 75 is fixed to the upper end of the main arm 70 and the first reinforcing member 71 . As shown in FIG. 3 , a pilot valve 77 is fixed to the mount plate 75 . Above the pilot valve 77 , the above-mentioned work operation lever 65 is disposed.

The turning work vehicle 1 includes a control valve 284 for switching the supply of hydraulic oil to various actuators for travel and work. The pilot valve 77 is connected to the control valve 284 via a flexible piping (not shown).

The pilot valve 77 controls the pilot oil pressure to the control valve 284 as the operator operates the operation lever 65 in the front-rear direction and the left-right direction. Thereby, for example, the turning of the upper revolving body 12, the floating operation|movement of the bucket 43, etc. can be implemented.

A second reinforcing member 72 is fixed to connect the mount plate 75 and the main arm 70 . As shown in FIG. 3, the 2nd support plate 62 is fixed to the 2nd reinforcing member 72, and this 2nd support plate 62 is arrange|positioned at the position which faces the main arm 70 and the left-right direction. Moreover, the 2nd support plate 62 is arrange|positioned in front of the 1st plate 66. As shown in FIG.

A support rod 95 is being fixed to the first reinforcing member 71 . The support rod 95 is suitably bent so as to turn around from above on the left-right direction outer side of the first plate 66 in the first posture P1 described above, and a cylindrical mounting boss 98 having a female screw formed at its tip. ) is fixed.

Said mounting boss 98 is being fixed similarly also to two points|points of the main arm 70, and one point of the 2nd support plate 62. As shown in FIG. The mounting bosses 98 are all arranged so as to protrude outward in the left-right direction, and a synthetic resin box body 55 is fixed to each mounting boss 98 with bolts as fastening members.

The box body 55 is configured in an upper and lower division shape, and is fixed to the mounting boss 98 by the bolts in a state in which they are coupled to each other. An opening for projecting the base member 60 is formed in the lower surface of the box body 55 . Moreover, in the box main body 55, the opening for protruding each of the work operation lever 65, the lock lever 56, and the arm rest 57 to the outside is formed suitably.

Between the front part of the main arm 70 and the 2nd support plate 62, the cam arm shaft 80 is rotatably supported. The cam arm shaft 80 is an elongated cylindrical member, and is arranged with its longitudinal direction toward the left-right direction. The cam arm shaft 80 is located in front of the base member 60 .

The above-described lock lever 56 is being fixed to the cam arm shaft 80 . The lock lever 56 is configured in a curved shape, and in the first posture P1 described above, its tip is obliquely upward.

A cam arm 81 is being fixed to an end of the cam arm shaft 80 on the side closer to the first plate 66 . The cam arm 81 includes an arm main body 82 , a guide projection (insertion portion) 83 , and a spring receiving member (central side projection) 84 .

The arm main body 82 is comprised as an elongate plate-shaped member. In the first posture P1 described above, the arm body 82 extends substantially rearward from the cam arm shaft 80 , and its tip end is inserted into the internal space of the base member 60 . The arm main body 82 is arranged so as to be adjacent to the first plate 66 in the left-right direction inside the first plate 66 . The thickness direction of the plate of the arm main body 82 coincides with the thickness direction of the first plate 66 .

The guide projection 83 is fixed to the tip of the arm main body 82 and protrudes outward in the left-right direction. A cam groove 88 is formed in a penetrating shape in the first plate 66 , and a guide projection 83 is inserted into the cam groove 88 . The tip of the cam arm 81 can be guided by the cam groove 88 .

The lock cam 79 is comprised by the cam arm 81 demonstrated above and the 1st plate 66. As shown in FIG. This lock cam 79 can lock the rotation of the box main body 55 (that is, the console rotation body mentioned later) in both the 1st attitude|position P1 and the 2nd attitude|position P2.

A projection 85 extending substantially perpendicular to the longitudinal direction of the arm body 82 is integrally formed in the longitudinal middle portion of the arm body 82 . A spring receiving member 84 is being fixed to this projection 85 . The spring receiving member 84 is a small member, and is arranged to protrude from the arm body 82 in the left-right direction (that is, on the side opposite to the direction in which the guide projection 83 protrudes from the arm body 82).

A torsion coil spring 86 is disposed so as to connect an appropriate position of the first plate 66 and the spring receiving member 84 .

The torsion coil spring 86 is disposed so that the axis of the coil portion around which the spring wire is wound faces in the left-right direction. One end of the spring wire of the torsion coil spring 86 faces outward in the left-right direction and is inserted into a small hole formed in the first plate 66 . The other end of the spring wire faces inward in the left-right direction and is inserted into a small hole formed in the spring accommodating member 84 .

The cam groove 88 has a substantially constant width, and is formed so as to smoothly curve in a substantially S-shape.

One of the cam grooves 88 that is farther from the cam arm shaft 80 curves downward so as to be convex, and the end thereof is substantially upward. A portion in the vicinity of the end portion serves as the first lock portion 91 of the cam groove 88 . On the other hand, the end of the cam groove 88 on the side closer to the cam arm shaft 80 is bent at a substantially right angle and is substantially upward. This bent portion serves as the second lock portion 92 of the cam groove 88 .

An electric switch 94 is attached to the second reinforcing member 72 . This electric switch 94 is provided with a contactor, and this contactor is press-fitted by the arm main body 82 at the position of the cam arm 81 shown in FIG. On the other hand, when the cam arm 81 rotates clockwise from the state of FIG. 3, the said press-in is cancelled|released. In this way, the electric switch 94 functions as a sensor that detects the rotation of the cam arm 81 .

Since the console box 52 of this embodiment has the above structure, it can be grasped|ascertained as the structure which supported the console rotating body rotatably with respect to the base body. The base body includes a base member 60 , a back plate 63 , and the like. The console rotating body includes a work operation lever (65), a box body (55), a lock lever (56), an arm rest (57), a main arm (70), a first reinforcing member (71), and a second reinforcing member (72). ), a mount plate 75 , and a second support plate 62 , and the like. In this embodiment, the change of the attitude|position of the box main body 55 has substantially the same meaning as the change of the attitude|position of a console rotating body.

Next, locking and unlocking by the cam arm shaft 80 and the cam groove 88 will be described.

The mode in which the box main body 55 has become the 1st attitude|position P1 in FIG. 3 is shown. At this time, the guide protrusion 83 positioned at the tip of the cam arm 81 enters the first lock portion 91 included in the cam groove 88 . The torsion coil spring 86 generates a spring force in a direction in which both ends of the spring wire are enlarged, and in the state of FIG. 3 , this spring force acts in a direction that rotates the cam arm 81 counterclockwise. . Accordingly, the cam arm 81 is held in a state in which the guide projection 83 enters the first lock portion 91 .

Since the gas damper 74 always elastically supports the main arm 70, in the first posture P1 in Fig. 3, a force to raise the console rotating body toward the second posture P2 acts. . However, since the guide projection 83 of the cam arm 81 is engaged with the first lock portion 91, the console rotating body (box body 55) does not rotate. In this way, the rotation lock in the first posture P1 is realized.

In the state of FIG. 3 , the contact of the electric switch 94 is press-fitted by the cam arm 81 which rotates counterclockwise by the spring force of the torsion coil spring 86 . As a result, the solenoid valve 264 is controlled to open the valve, and hydraulic oil is supplied to the pilot valve 77 . Accordingly, the operation of the work operation lever 65 is in an effective state. Since the console rotating body including the work operation lever 65 is locked so as not to rotate from the first posture P1, the operator can stably operate the work operation lever 65 by hand.

From the state of Fig. 3, when the operator operates to pull the lock lever 56 obliquely rearward, the cam arm shaft 80 first rotates, and with this, the cam arm 81 rotates the torsion coil spring ( 86) and rotates downward against the spring force. As a result, the guide projection 83 of the cam arm 81 disengages the first lock portion 91 . At this point, the rotation lock in the first posture P1 is released.

At an appropriate timing while the guide projection 83 is moving along the cam groove 88 (for example, the timing just before the guide projection 83 pulls out of the first lock portion 91), the torsion coil spring 86 ) of the spring wire and the cam arm shaft 80, the crossing of the supporting point occurs. After that, the spring force of the torsion coil spring 86 acts in the direction of rotating the cam arm 81 clockwise. Accordingly, the guide protrusion 83 of the cam arm 81 passes through the curved portion convex downward in the cam groove 88 with the lifting of the console rotating body by the elastic force of the gas damper 74 . , moves toward the second lock portion 92 . The elastic force of the gas damper 74 continues to act, and the console rotating body rotates around the support shaft 69 .

In the present embodiment, since the elastic support of the console rotating body is performed by the gas damper 74, it is possible to suppress a change in the elastic force over the entire rotation stroke of the console rotating body. As a result, the operator can obtain a stable assisting force, and can rotate the console rotating body so that the box main body 55 may change from the 1st attitude|position P1 to the 2nd attitude|position P2. In addition, since at least the middle portion of the cam groove 88 is formed in the shape of a smooth curved line, the movement of the cam arm 81 or the like is smooth, and the posture of the console rotating body can be changed smoothly.

In the process of rotating the console rotating body, the cam arm 81 rotates clockwise by the spring force of the torsion coil spring 86, so that the contact of the electric switch 94 is not press-fitted by the cam arm 81. do. Therefore, the valve closing control of the above-mentioned solenoid valve 264 is carried out, and supply of the hydraulic oil to the pilot valve 77 is prevented. In this way, in association with the change from the first posture P1 to the second posture P2 of the console box 52, the operation of the work operation lever 65 is invalidated.

When the console rotating body rotates until the guide projection 83 reaches the second lock portion 92, the second posture P2 shown in FIG. 5 is obtained. In the state of FIG. 5, the spring force of the torsion coil spring 86 acts in the direction which rotates the cam arm 81 clockwise. Therefore, the cam arm 81 is maintained in the state in which the guide projection 83 entered the curved 2nd lock part 92. As shown in FIG. In addition, the rotation stroke of the console rotating body is regulated by the stopper 96 formed on the first reinforcing member 71 abutting against the upper end of the back plate 63 .

In this second posture P2 , for example, even if the operator holds the arm rest 57 and attempts to rotate it toward the first posture P1 side, the guide projection 83 is placed on the bent portion of the second lock portion 92 . Because of the engagement, the cam arm 81 is held up, and rotation of the console rotating body (box body 55) is prevented. In this way, the rotation lock in the second posture P2 is realized. As described above, since the operation of the work operation lever 65 is invalidated, for example, even if the body of an operator getting up and down on the turning work vehicle 1 comes into contact with the work operation lever 65, the work equipment ( 13) The back does not move.

To return to the first posture P1 from the second posture P2, in the state of Fig. 5, the operator operates the lock lever 56 to be lowered obliquely forward. As a result, the cam arm 81 rotates against the spring force of the torsion coil spring 86 , and the guide projection 83 is disengaged from the second lock portion 92 of the cam groove 88 . At this point, the lock in the second posture P2 is released. By further lowering the lock lever 56 , the operator rotates the console rotating body against the elastic force of the gas damper 74 . At an appropriate timing after the guide protrusion 83 moving along the cam groove 88 passes the lower end position of the curved portion convex downward, the above fulcrum overturning occurs, and the torsion coil spring 86 The spring force of A acts in a direction which rotates the cam arm 81 counterclockwise. As a result, the guide projection 83 moves to the first lock portion 91 . By the above, the box main body 55 can be returned to the 1st attitude|position P1, and it can lock again. Moreover, since the contact of the electric switch 94 is press-fitted by the cam arm 81 by counterclockwise rotation of the cam arm 81, operation of the operation operation lever 65 becomes effective.

In the present embodiment, the lock lever 56 is elastically supported by a torsion coil spring 86 instead of a tension spring or the like. Accordingly, since the elastic force can be obtained without large deformation of the coil portion, the compact configuration of the console box 52 can be easily realized. Although not illustrated, a plurality of pipes connected to the pilot valve 77 are arranged in a space located on the left and right central sides of the console box 52 rather than the first plate 66 . In addition, since the pipe is deformed with the rotation of the above-described console rotating body, a margin for allowing the deformation must be secured around the pipe. Moreover, in the left and right center side of the console box 52 rather than the 1st board 66, around the cam arm 81, the space for the said cam arm 81 to move must be ensured. Accordingly, the configuration using the torsion coil spring 86 as in the present embodiment is particularly effective when it is difficult to secure a space on the side closer to the left and right center of the box body 55 than the first plate 66 . For example, this configuration is preferable in a case where the left and right width of the console box 52 cannot be increased in a small turning work vehicle in which the turning radius of the upper swing body 12 is limited.

As shown in FIG. 4 etc., the coil part which the torsion coil spring 86 has is arrange|positioned in the left-right direction inside the 1st plate 66 in which the cam groove 88 is formed. The coil part of the torsion coil spring 86 is arrange|positioned so that it may fit in the width|variety of the left-right direction between the 1st plate 66 and the spring receiving member 84. As shown in FIG.

The center of this coil part is oriented substantially parallel to the axis line of the cam arm shaft 80 . No members, such as a guide shaft, are inserted in the inside of a coil part. Thereby, the degree of freedom of the position of both ends of the spring wire can be increased.

As shown in FIG. 4, when the box main body 55 becomes the 1st attitude|position P1, a spring wire extends substantially upward from the connection point with the 1st support plate 61, and is connected to the coil part. Also from the connection point with the spring receiving member 84, the spring wire extends substantially upward and is connected to the coil part. The coil portion is disposed above the arm body 82 . In this way, the torsion coil spring 86 connects the first plate 66 and the spring receiving member 84 by substantially bypassing the upper side of the arm body 82 .

As shown in FIG. 5, when the box main body 55 is in the 2nd attitude|position P2, the spring wire of the torsion coil spring 86 is extended diagonally upward from the connection point with the 1st support plate 61, , connected to the coil part.

In this way, also in any of the 1st attitude|position P1 and 2nd attitude|position P2, the coil part is above the position where the spring wire is attached to the 1st support plate 61. As shown in FIG. Therefore, since the spring wire extends downward to the first support plate 61 and is connected, the coil portion and other members (for example, the arm body 82 and the above piping not shown) interfere easily. It is possible to realize an arrangement that does not

The turning work vehicle 1 of the present embodiment includes a bonnet switch 275 . The bonnet switch 275 is attached to an appropriate position of the revolving frame 31 . This bonnet switch 275 is provided with a contactor, and in the state in which the bonnet 38 is closed, it is arrange|positioned so that a contactor may press-fit by the small operation member fixed to the inner wall of the bonnet 38. As shown in FIG. The bonnet switch 275 is configured such that the contact is closed in the state in which the contact is press-fitted, and the contact is opened in the state in which the contact is not press-fitted. Thereby, the bonnet switch 275 can detect the open/close state of the bonnet. The bonnet switch 275 outputs the detection result regarding the opening and closing of the bonnet 38 to the solenoid valve 264 .

As mentioned above, the electric switch 94 is attached to the appropriate position in the inside of the box main body 55 with which each of the console boxes 52 on either side is equipped. Each electric switch 94 has a contactor, and when the console box 52 is in the above first posture P1, the contactor is closed by an appropriate member (for example, the cam arm 81 described above). It is arranged to be press-fitted. The electrical switch 94 is comprised so that a contact may be closed in the state in which the contact was press-fitted, and a contact may be opened in the state which is not press-fitted. Thereby, the electric switch 94 can detect the posture of the console box 52 . Each of the left and right electric switches 94 is electrically connected to the solenoid valve 264, and outputs the detection result regarding the attitude|position of the console box 52 to the solenoid valve 264. As shown in FIG.

As for the solenoid valve 264, when the contact is closed with respect to both the electric switch 94 and the bonnet switch 275 on either side, it will be in a valve open state. On the other hand, when the contact is open with respect to at least any one of the electric switch 94 and the bonnet switch 275 on either side, it will be in a valve closing state.

Therefore, the solenoid valve 264 supplies hydraulic oil to the pilot valve 77 when both the left and right console boxes 52 are in the first posture P1 and the bonnet 38 is in the closed state. The operation of the work device 13 and the like by the work operation lever 65 is made effective. On the other hand, in cases other than the above, the supply of hydraulic oil to the pilot valve 77 is cut off to invalidate the operation of the work device 13 or the like by the work operation lever 65 .

1 and 10, a safety frame (safety device) 266 for forming a space around the operator when the turning work vehicle 1 is overturned is fixed to the rear of the turning frame 31, have. However, in FIG. 10, in order to show the structure of the inside of the bonnet 38 clearly, the safety frame 266 is drawn transparently by the chain line.

This safety frame 266 is comprised in the 2 column type, and has become an inverted U-shape when viewed from the front. The safety frame 266 includes two posts 270 , a first connecting portion 271 , and a second connecting portion (regulating portion) 272 .

The post 270 is each comprised as a member which is generally elongate in an up-down direction, and is arrange|positioned in the upper revolving body 12 in a pair of right and left. The lower part of each post 270 is the rear side of the engine 33 and is fixed to the left and right obliquely rear part of the turning frame 31. As shown in FIG. The two posts 270 are arrange|positioned so that the space|interval sufficient mutually in the left-right direction of the upper revolving body 12 may be set. Therefore, in the opening and closing of the bonnet 38 and the change of attitude|position of the console box 52, the support|pillar 270 does not become an obstacle.

The 1st connection part 271 is comprised as a member elongate in the left-right direction. The 1st connection part 271 is integrally formed with respect to the said support|pillar 270 so that the upper ends of the post 270 on either side may be connected.

The 2nd connection part 272 is comprised as a member elongate generally in the left-right direction. The 2nd connection part 272 is a position lower than the 1st connection part 271, and is arrange|positioned so that the post 270 comrades on either side may be connected. This second connecting portion 272 has a bent portion so as to become forward as it approaches both ends from the longitudinal middle portion (that is, the connection point to the post 270 ).

Next, with reference to FIG. 12, the arrangement|positioning of the 2nd connection part 272 is demonstrated concretely. In addition, in FIG. 12, when the arc-shaped locus|trajectory drawn by the front-end|tip of the work operation lever 65 when the console box 52 is rotated is considered, the 2nd connection part 272 is cut by the imaginary plane containing this trajectory. This is indicated by hatching.

That is, as shown in Fig. 12, the distance between the rotation shaft 245c of the bonnet 38 and the tip of the work operation lever 65 in the first posture P1 is the radius, and the rotation shaft 245c is the center. Consider a first imaginary circle (C1) where Further, a second virtual circle C2 centered on the rotation shaft 245c is considered as the radius of the distance between the rotation shaft 245c and the tip of the work operation lever 65 in the second posture P2. do. At this time, the 2nd connection part 272 is arrange|positioned inside the 1st virtual circle C1, and the outside of the 2nd virtual circle C2.

Moreover, as shown in FIG. 12, the distance between the support shaft 69 which is the rotation center of the console box 52, and the front-end|tip of the work operation lever 65 is made into a radius, and the support shaft in the state where the bonnet 38 is closed. Consider a third imaginary circle (C3) centered on (69). At this time, the 2nd connection part 272 is arrange|positioned outside the 3rd virtual circle C3.

By disposing the second connecting portion 272 (specifically, the portion indicated by hatching in FIG. 12) in this way, the following effects can be obtained. That is, in the state where the console box 52 is in the first posture P1, even if the bonnet 38 is to be rotated, the work operation lever 65 interferes with the second connection portion 272, so that the bonnet 38 can't open However, in the state in which the bonnet 38 is closed, the console box 52 can be switched from the 1st attitude|position P1 to the 2nd attitude|position P2. Then, if the console box 52 is switched to the second posture P2, when the bonnet 38 is rotated in this state, the upper end of the work operation lever 65 is higher than the second connecting portion 272. Since it passes in the vicinity of the rotation shaft 245c of FIG. 12, the bonnet 38 can be opened as shown by the chain line in FIG.

Next, the opening/closing operation of the bonnet 38 is demonstrated.

The operation of opening the bonnet 38 in the closed state will be described. The operator operates the lock lever 56 for each of the left and right console boxes 52 to switch the console box 52 from the first posture P1 to the second posture P2.

As a result of this operation, since it is detected by the electric switch 94 that the console box 52 has reached the second posture P2, the solenoid valve 264 is closed, and the left and right operation operation levers 65 are closed. operation is invalidated. Therefore, even when, for example, the operator unexpectedly touches the work operation lever 65 while the bonnet 38 is being opened while the engine 33 is running, the work device 13 is accompanied by this contact. Movement of the back is prevented. Therefore, the bonnet 38 can be opened with confidence.

Then, the operator puts a hand on the appropriate point of the bonnet 38, and rotates it back-upward. Finally, the bonnet 38 rotates in front fastening to the position shown by the chain line in FIG. Thereby, the inside of the bonnet 38 (for example, the engine 33) can be accessed easily.

If at least any of the left and right console boxes 52 is in the first posture P1 , even if the bonnet 38 is to be opened, the operation operation lever 65 interferes with the second connecting portion 272 , and thus it cannot be opened. Therefore, after setting the console box 52 of both right and left to the 2nd attitude|position P2, the operation|work in the correct order of opening the bonnet 38 can be guided.

Further, as a result of the operator accidentally opening the bonnet 38 in the state where the console box 52 is in the first posture P1, the operation operation lever 65 touches the second connection portion 272, and the pilot valve 77 It is also conceivable that the However, in the present embodiment, at the beginning of the stroke for rotating the bonnet 38 to open, the bonnet switch 275 detects the open state of the bonnet 38 and opens the contact, so the solenoid valve 264 at that point. is switched to the valve closed state. As a result, since the operation of the operation operation lever 65 is invalidated at the point in time before the operation operation lever 65 touches the second connection portion 272, it is possible to prevent the operation apparatus 13 or the like from moving. .

The operation of closing the bonnet 38 in an open state may be performed opposite to the above. The operator first closes the bonnet 38, so that over the entire stroke of rotating the bonnet 38, the console box 52 is in the second posture P2, so that the work operation lever 65 Even if it touches, the working device 13 does not move. Immediately before the bonnet 38 is completely closed, the bonnet switch 275 detects the closed state of the bonnet 38 and closes the contact. After closing the bonnet 38, the operator switches the left and right console boxes 52 from the second posture P2 to the first posture P1. In this process, the left and right electric switches 94 detect the 1st attitude|position P1, and close the contact point. As a result, the operation of the work operation lever 65 is validated by the solenoid valve 264 .

As described above, in the turning work vehicle 1 of the present embodiment, even when the bonnet 38 is opened and the engine 33 is in a running state, since the operation of the work operation lever 65 is invalidated, the upper turning body ( 12) is not turning or the working device 13 is operating. Therefore, maintenance work can be performed with confidence.

Further, by the second connection portion 272 of the safety frame 266, the bonnet 38 cannot be opened and closed unless the console box 52 is in the second posture P2. Accordingly, it is possible to reliably keep the order for the opening and closing of the bonnet 38 for the operator.

In addition, the second connecting portion 272 has a shape that is bent forward as it approaches the connection point from the longitudinal middle portion to the post 270 (that is, the ends on both left and right sides). Accordingly, since the arrangement of the second connecting portion 272 such that the operator sitting on the driver's seat 39 does not become cramped can be realized, habitability can be ensured.

Next, two handles used for opening and closing the bonnet 38 will be described with reference mainly to FIG. 14 . 14 : is the perspective view which looked at the lock release handle 371 and the belt 372 of 1st Embodiment from the front side.

The bonnet 38 is provided with a lock mechanism 380 capable of holding the bonnet 38 in a closed state. This locking mechanism 380 has an unlocking handle (first handle) 371 disposed at the lower front side of the bonnet 38 .

The lock mechanism 380 includes a support boss 385 , a locking plate 386 , and a torsion coil spring 387 in addition to the lock release handle 371 described above. In addition, in the description of the lock mechanism 380, left and right means the left and right as seen by the operator seated in the driver's seat.

The support boss 385 is a cylindrical member and is being fixed to the inner wall of the bonnet 38 via a bracket 388 . The shaft hole of the support boss 385 is oriented substantially in the front-back direction, and the base part of the lock release handle 371 bent in an L-shape is rotatably supported by this shaft hole.

The lock release handle 371 protrudes forward from the support boss 385 and passes through a through hole (not shown) formed in the bonnet 38 , and then is bent approximately 90° to the left. A grip portion for operation is fixed to the tip of the bent portion.

The locking plate 386 is a plate-shaped member, and is fixed to the end of the lock release handle 371 inside the bonnet 38 . Accordingly, the locking plate 386 rotates integrally with the unlocking handle 371 .

In the locking plate 386 , a locking groove 386a is formed at a position lower than the rotation center thereof. This locking groove 386a is formed as an elongate groove in the left-right direction, and has an open end at the right side. An elongated lock rod 389 is fixed to an appropriate member on the side of the revolving frame 31 . The lock rod 389 extends substantially upward from the swing frame 31, and the end thereof is bent into a hook shape. The distal end of the lock rod 389 can be inserted into the locking groove 386a.

Below the locking groove 386a, the locking plate 386 is provided with an inclined guide portion 386b. This inclination guide part 386b can rotate the locking plate 386 by being pressed by the front-end|tip of the lock rod 389. As shown in FIG.

The torsion coil spring 387 is disposed so as to connect the bracket 388 and the locking plate 386 . The torsion coil spring 387 functions as an elastic support member, and with respect to the locking plate 386 , in a clockwise direction when viewed from the front, that is, the direction in which the locking grooves 386a engage with each other at the tip of the lock rod 389 . of the spring force.

In this configuration, in the state in which the operator closes the bonnet 38 , the locking grooves 386a of the locking plate 386 are meshed with each other by the elastic force of the torsion coil spring 387 . Thereby, it becomes a locked state, and even if an operator grabs and raises the belt 372 mentioned later, for example, the bonnet 38 does not open.

When the operator grabs the lock release handle 371 and pulls it upward, and rotates the support boss 385 as the center, it resists the elastic force of the torsion coil spring 387 and the locking plate 386 rotates counterclockwise when viewed from the front. Because of the rotation, the engagement between the locking groove 386a and the lock rod 389 is released. As a result, the lock is released, and the bonnet 38 can be opened.

The rotational stroke of the lock release handle 371 is limited by the appropriate portion of the locking plate 386 touching the bracket 388 . Therefore, after the operator raises the unlocking handle 371 to the upper limit, the pulling force applied by the operator to the unlocking handle 371 acts to rotate the bonnet 38 itself in the opening direction. In other words, the unlocking handle 371 also has a function as a handle held by the operator in order to raise and rotate the bonnet 38 . Accordingly, the unlocking and opening operations of the bonnet 38 can be performed in one action.

When closing the bonnet 38 in an open state, just before the bonnet 38 is completely closed, the tip end of the lock rod 389 abuts against the inclined guide portion 386b, so that the locking plate 386 is rotated by the torsion coil spring 387 ) and rotates against the elastic force of When the bonnet 38 is completely closed, the lock rod 389 enters the locking groove 386a, and automatically returns to the above locked state.

Next, the belt (second handle) 372 arrange|positioned just below the front part of a driver's seat is demonstrated.

The driver's seat 39 is attached above the bonnet 38 using the front side support member 361 and the rear side support member 362, as shown in FIG. As a result, a gap in the vertical direction is formed between the driver's seat 39 and the upper surface of the bonnet 38 .

The front side support member 361 is formed by bending a metal plate, and is formed in a wide substantially U-shape when viewed from the front. The center bottom plate part is being fixed to the front part and right and left central part among the upper surfaces of the bonnet 38 using a pair of right and left bolts (fixing member) 363. The substantially inverted U-shaped brackets 364 fixed to the lower surface of the driver's seat 39 can be fixed to the left and right side plates via the fulcrum shaft 365, respectively.

The rear support member 362 has a cylindrical vibration-proof rubber, and is being fixed to the rear part of the upper surface of the bonnet 38 by a pair of right and left. The lower surface of the driver's seat 39 can be attached to the upper end of each rear support member 362 .

The belt 372 is configured as an elongated band-like body, and at both ends thereof, buckle portions for fixing to the bonnet 38 are fixed. The buckle portion is made of, for example, metal or synthetic resin, and is fixed to the bonnet 38 together with the front side support member 361 by the bolt 363 described above.

The longitudinal middle part of the belt 372 is comprised, for example using polyester fiber as a raw material, and has flexibility. Since the length of the belt 372 is longer than the distance between the mounting points (that is, the bolts 363) at both ends, it has a slight slack. Accordingly, the middle portion of the belt 372 can be arranged to sag forward and forward while slightly protruding forward from the front end of the driver's seat 39 . Since the belt 372 is easily deformed, even if the belt 372 touches an operator who goes up and down on the turning work vehicle 1, it is not easily obstructed. However, the belt 372 can also be accommodated in the space between the bonnet 38 and the driver's seat 39 by press-fitting the belt 372 from below the driver's seat 39 to the rear.

Next, the structure for holding the bonnet 38 in an open state is demonstrated with reference to FIG. 15 : is a side schematic diagram explaining the function of the bonnet stay 48. As shown in FIG.

As shown in FIG. 15, the stay support member 346 is being fixed in the inside of the space covered by the bonnet 38 in the upper revolving body 12. As shown in FIG. This stay support member 346 is formed in plate shape, and is arrange|positioned toward the left-right direction with the thickness direction.

On the other hand, a guide member 47 is being fixed to an appropriate position on the inner wall of the bonnet 38 . In this guide member 47, the guide groove 47a of the elongate penetrating shape is formed in the front-back direction. One end of the guide groove 47a is bent short.

One end of the bonnet stay 48 formed in the shape of a rod is rotatably supported by the rear upper part of the stay support member 346 . The other end of the bonnet stay 48 is inserted into the guide groove 47a formed in the guide member 47, and is slidable along this guide groove 47a.

In this configuration, when the operator intends to open the bonnet 38, as a preliminary preparation, the lock lever 56 is operated with respect to the left and right console boxes 52 shown in FIG. 13 and the like, and the two console boxes 52 Make both sides of the second posture (P2) protruding backwards. As a result, as described above, the operation of the work operation lever 65 is invalidated.

Then, the operator holds the lock release handle 371 with one hand and pulls it up with both hands while holding the belt 372 with the other hand. Since the belt 372 is deformable, it can be firmly grasped and held by a person with a large hand as well as a person with a small hand. The lock of the lock mechanism 380 is released by applying an upward operating force to the unlocking handle 371 , and thereafter, the bonnet 38 rotates upward and backward about the rotation shaft 245c as a center. Since the force is applied to the bonnet 38 at two points, the lock release handle 371 and the belt 372, the force of both arms can be stably applied, and an elastic support device such as a torsion bar (auxiliary) Even without the device), the rotation of the bonnet 38 is smooth.

As the bonnet 38 rotates, the bonnet stay 48 rotates, and the tip moves along the guide groove 47a. When the bonnet 38 is rotated to a predetermined angle, the tip of the bonnet stay 48 enters the bent portion of the guide groove 47a as shown by the chain line in FIG. 15, and the bonnet 38 is about to fall backward. ), the bonnet stay 48 can pull and hold. In this state, for example, even when a force to rotate the bonnet 38 forward is applied by mistake during maintenance work, the tip of the bonnet stay 48 is attached to the short groove connected to the bent portion of the guide groove 47a. Because of the entry, the bonnet stay 48 is supported at the end of this short groove, and the bonnet 38 is prevented from closing suddenly.

To close the bonnet 38 from the open state as shown by the chain line in Fig. 15, pull the bonnet stay 48 slightly upward by hand so that its tip is released from the short groove in the guide groove 47a, and then lock While holding the release handle 371 and the belt 372, the bonnet 38 is rotated in the opposite direction to the above.

Thus, in this embodiment, since the bonnet 38 is arrange|positioned by the two points|positions of the bonnet 38, it is the structure which it is easy to perform the opening and closing operation of the bonnet 38 with both hands. Therefore, for example, in a small turning work vehicle, even if it is difficult to form a torsion bar or the like inside the bonnet 38 due to space circumstances, it is possible to improve the maintainability by configuring as in the present embodiment.

As described above, the turning work vehicle 1 of the present embodiment includes a console box 52 . The console box 52 includes a box body 55 , a work operation lever 65 , a lock lever 56 , a gas damper 74 , and a lock cam 79 . The box main body 55 is rotatable between the first posture P1 and the second posture P2 which protrudes from the first posture P1. The work operation lever 65 is disposed so as to protrude from the box body 55 . The lock lever 56 is disposed so as to protrude from the box body 55 and is rotatable. The gas damper 74 elastically supports the box body 55 toward the second posture P2 side. The lock cam 79 locks rotation of the box main body 55 in both the 1st attitude|position P1 and the 2nd attitude|position P2. The lock cam 79 includes a first plate 66 and a cam arm 81 . A cam groove 88 is formed in the first plate 66 . The cam arm 81 rotates integrally with the lock lever 56 . The cam arm 81 has a guide projection 83 inserted into the cam groove 88 . A torsion coil spring 86 for elastically supporting the cam arm shaft 80 is disposed so as to connect the cam arm 81 and the first plate 66 . The cam arm 81 reverses the rotating direction by the elastic force of the torsion coil spring 86 while the guide projection 83 is moving along the cam groove 88 . The coil portion of the torsion coil spring 86 is disposed on the side closer to the left and right center of the box body 55 than the first plate 66 .

Thereby, by using the torsion coil spring 86 which can realize a large stroke while suppressing the size of the spring itself, the space inside the box body 55, in particular, the box body 55 rather than the first plate 66 You can effectively utilize the space on the left and right center of the . As a result, compaction of the console box 52 becomes easy.

Moreover, in the turning work vehicle 1 of this embodiment, the cam arm 81 is equipped with the plate-shaped arm main body 82 and the spring receiving member 84. As shown in FIG. The arm main body 82 is arrange|positioned at the side closer to the left-right center of the box main body 55 than the 1st board 66. The spring accommodating member 84 protrudes from the arm main body 82 toward the side close to the right and left center of the box main body 55 . One end of the spring wire of the torsion coil spring 86 is mounted to the first plate 66 , and the other end is mounted to the spring receiving member 84 .

Thereby, the arm main body 82 of the cam arm 81 is brought close to the 1st plate 66, and while effectively utilizing the space inside the box main body 55, a torsion coil spring with high space saving property. The cam arm 81 can be elastically supported by (86).

In addition, in the turning work vehicle 1 of this embodiment, the torsion coil spring 86 also when the box main body 55 is in the 1st attitude|position P1 and when it exists in the 2nd attitude|position P2. ) is above the position where the spring wire is mounted to the first plate 66 .

As a result, the spring wire extends downwardly and connects to the first plate 66, so that the coil portion of the torsion coil spring 86 does not interfere with other parts easily in the box body 55. can do. As a result, a compact configuration can be realized.

Moreover, in the turning work vehicle 1 of this embodiment, the elastic support member which elastically supports the box main body 55 to the 2nd attitude|position P2 side is comprised as the gas damper 74. As shown in FIG.

Thereby, since it is easy to make small the spring constant, the fluctuation|variation of an elastic force can be made small in the process of the box main body 55 rotating. As a result, the smooth change of the attitude|position of the box main body 55 is realizable.

Moreover, in the turning work vehicle 1 of this embodiment, the cam groove 88 is formed in the shape of a smooth curved line.

Thereby, the operation of the lock cam 79 can be performed smoothly.

Moreover, the turning work vehicle 1 of this embodiment is provided with the work operation lever 65, the control box 152, and the traveling speed stage changeover switch 155. The work operation lever 65 is disposed on each of the left and right sides of the driver's seat. The control box 152 is formed so as to protrude upward on the floor surface in front of the driver's seat 39 . The travel speed stage changeover switch 155 is operated by the operator to switch the travel speed stage. The traveling speed stage changeover switch 155 is provided above the control box 152 .

In this way, by providing the traveling speed stage changeover switch 155 at a position where the operator sitting on the driver's seat 39 can visually recognize, the operator can easily confirm the operation state of the high speed end/low speed stage. In addition, by disposing the traveling speed stage changeover switch 155 in the control box 152 in front of the driver's seat 39, the operator can change the traveling speed stage with either left or right hand, thereby increasing the degree of freedom of operation. can be improved

Moreover, in the turning work vehicle 1 of this embodiment, the control box 152 is equipped with the lamp 58 which displays the operation state of the traveling speed stage changeover switch 155.

Thereby, the visibility of the switching state of a traveling speed stage can further be improved.

Moreover, in the turning work vehicle 1 of this embodiment, the traveling operation levers 36L, 36R arrange|positioned in the control box 152 are provided. The traveling speed stage changeover switch 155 is disposed in a position deviating from the traveling operation levers 36L and 36R in the left-right direction of the control box 152 .

Thereby, the operator can operate the travel speed stage changeover switch 155 with the other hand, operating the travel operation levers 36L, 36R with one hand. That is, the convenience of both-hand operation can be improved.

Moreover, in the turning work vehicle 1 of this embodiment, the 1st port 181 and 2nd port 182 for driving an attachment work machine, and the pedal 156 for power extraction are provided. The power take-off pedal 156 is used by the operator to operate the attachment working machine with his or her feet. When the pedal 156 for power extraction is operated to one side from the neutral position, hydraulic oil is supplied to the first port 181 , and when operated to the opposite side, hydraulic oil is supplied to the second port 182 .

Thereby, for example, when the attachment working machine is provided with the attachment cylinder 90 of a double acting type, the said attachment cylinder 90 can be operated by stepping on the pedal 156 for power take-off to one side / the other side. have. Accordingly, it is possible to realize a feeling of intuitively easy to understand operation.

Moreover, the turning work vehicle 1 of this embodiment is equipped with the bonnet 38, the console box 52, the solenoid valve 264, and the safety frame 266. The bonnet 38 is rotatably supported centering on a rotating shaft 245c disposed at the rear of the engine 33 , covers the engine 33 , and can be opened and closed. The console box 52 has a work operation lever 65 operated by an operator, is rotatably supported with respect to the bonnet 38 , and rotates in the same direction as the rotational direction for opening the bonnet 38 , whereby the first posture It is switchable from (P1) to the 2nd attitude|position P2, and is switchable from the 2nd attitude|position P2 to the 1st attitude|position P1 by rotating in the opposite direction. The solenoid valve 264 validates the operation of the operation operation lever 65 when the console box 52 is in the first posture P1 and the bonnet 38 is in the closed state, and otherwise The operation of the work operation lever 65 is invalidated. The safety frame 266 prevents the opening and closing of the bonnet 38 when the console box 52 is in the first posture P1, and permits the opening and closing of the bonnet 38 when the console box 52 is in the second posture P2.

Thereby, it is possible to open the bonnet 38 in the state which made the console box 52 into the 2nd attitude|position P2, and maintenance of the engine 33 etc. can be performed with this. And when the bonnet 38 is an open state, or when the console box 52 is the 2nd attitude|position P2, operation of the operation|work operation lever 65 is invalidated by the solenoid valve 264. As shown in FIG. Therefore, for example, when the bonnet 38 is opened while the engine 33 is running to perform maintenance of the hydraulic circuit, etc., even when the operation operation lever 65 is unexpectedly touched, the action can be prevented. Moreover, by the safety frame 266, it can ensure that the console box 52 is in the 2nd attitude|position P2 at the time of opening and closing of the bonnet 38. As shown in FIG. Accordingly, it is possible to reliably prevent the operation of the turning work vehicle 1 by coming into contact with the work operation lever 65 when the bonnet 38 is opened and closed.

In addition, the turning work vehicle 1 of the present embodiment includes a driver's seat 39 . The safety frame 266 includes a post 270 and a second connecting portion 272 . The posts 270 are arranged in pairs at intervals in the width direction of the driver's seat 39 . The 2nd connection part 272 connects the support|pillar 270 mutually. The distance between the rotation center of the bonnet 38 (support shaft 69) and the tip end of the work operation lever 65 in the first posture P1 is a radius, and the rotation center of the bonnet 38 (rotation shaft 245c) )) is defined as the first virtual circle C1. Let the distance between the rotating shaft 245c and the front-end|tip of the work operation lever 65 in the 2nd attitude|position P2 be a radius, and let the imaginary circle centering on the rotating shaft 245c be the 2nd imaginary circle C2. At this time, all of the 2nd connection part 272 is arrange|positioned inside the 1st virtual circle C1. All of the 2nd connection part 272 is arrange|positioned outside the 2nd imaginary circle C2.

Thereby, when the console box 52 is in the 1st attitude|position P1, rotation of the bonnet 38 is blocked|prevented by the work operation lever 65 contacting the 2nd connection part 272. As shown in FIG. Therefore, opening and closing of the bonnet 38 in the state where the console box 52 is in the 1st attitude|position P1 can be prevented reliably.

Moreover, in this embodiment, the distance between the rotation center (support shaft 69) of the console box 52 and the front-end|tip of the work operation lever 65 is made into a radius, and the support shaft in the state where the bonnet 38 is closed. An imaginary circle centered at (69) is defined as a third imaginary circle (C3). At this time, the 2nd connection part 272 is arrange|positioned outside the 3rd virtual circle C3.

Thereby, in the state in which the bonnet 38 is closed, since the 2nd connection part 272 does not interfere when changing the attitude|position of the console box 52, a series of operations for opening and closing of the bonnet 38 are smoothly performed. can be carried out.

Moreover, in the turning work vehicle 1 of this embodiment, the 2nd connection part 272 is formed so that it may become forward as it approaches the connection point to the support post 270 from the longitudinal middle part.

Thereby, space can be ensured around the operator who sits on the driver's seat 39, and comfort can be improved.

Moreover, the turning work vehicle 1 of this embodiment is provided with the bonnet 38, the unlocking handle 371, and the belt 372. The bonnet 38 is rotatably supported centering on a rotation shaft 245c located at the rear of the engine 33 , covers the engine 33 , and can be opened and closed. The lock release handle 371 is disposed on the front surface of the bonnet 38 . The belt 372 is disposed on the bonnet 38 at a higher position than the unlocking handle 371 .

Thereby, the bonnet 38 can be opened and closed using both hands, holding the lock release handle 371 and the belt 372 one by one. Therefore, the opening/closing operation of the bonnet 38 can be performed easily and smoothly. Therefore, for example, even when a torsion bar etc. which elastically support the bonnet 38 in the opening direction are abbreviate|omitted, maintainability of the engine 33 etc. can be made favorable.

Moreover, the turning work vehicle 1 of this embodiment is equipped with the driver's seat 39 attached to the upper surface of the bonnet 38. As shown in FIG. At least a part of the belt 372 can be accommodated in a space formed between the bonnet 38 and the driver's seat 39 .

Thereby, when it is not necessary to put a hand on the belt 372, it can accommodate in the place which does not interfere.

In addition, in the turning work vehicle 1 of this embodiment, the belt 372 is an elongate band-shaped body which has flexibility. Both longitudinal ends of the belt 372 are attached to the bonnet 38 , and the middle portion can be accommodated in a space formed between the bonnet 38 and the driver's seat 39 .

Thereby, the simple and low-cost structure which can accommodate the belt 372 can be implement|achieved.

Next, a second embodiment will be described. Fig. 16 is a perspective view showing in detail the retractable handle 372x of the second embodiment. In addition, in description of this embodiment, the same code|symbol is attached|subjected to drawing to the member same or similar to the above-mentioned embodiment, and description may be abbreviate|omitted.

The second embodiment differs from the first embodiment in that the bonnet 38 is provided with a retractable handle 372x instead of the belt 372 described above. In addition, in FIG. 16 , in order to clearly show the retractable handle 372x and the like, a state in which an appropriate member such as a console box 52 or the like around the driver's seat 39 is separated from the bonnet 38 is drawn. .

This retractable handle 372x is attached to the upper surface of the bonnet 38 via a slide mechanism 390 . This slide mechanism 390 includes a guide bracket 395 , a pair of sliders 396 , and two guide pins 397 .

The guide bracket 395 is formed as an elongated member having an inverted U-shaped cross section, and is fixed to the front and left and right central portions of the upper surface of the bonnet 38 with its longitudinal direction in the front-rear direction. . On the side walls of the right and left sides of the guide bracket 395, penetrating guide grooves 395a having the same shape on the left and right are respectively formed. Each of the guide grooves 395a is formed in an E-shape facing to the side, and in this guide groove 395a, three short retaining grooves extending downward are formed at equal intervals. The holding groove is disposed at the front end, the rear end, and the central portion of the guide groove 395a.

The slider 396 is formed in +3-1 pair so that the guide bracket 395 may be pinched|interposed in the left-right direction. Each slider 396 is elongated in the front-rear direction, and its front end is fixed to both ends of a retractable handle 372x formed in a substantially C-shape in plan view.

Both of the two guide pins 397 are thin round-bar-shaped members. Each guide pin 397 is arrange|positioned toward the left-right direction in the longitudinal direction so that a pair of slider 396 comrades may be mutually connected. The guide pins 397 are inserted into guide grooves 395a formed on both side walls of the guide bracket 395 and can move along the guide grooves 395a.

Each guide pin 397 is arrange|positioned at intervals in the front-back direction, and is mutually oriented in parallel. The interval between the guide pins 397 is equal to the interval between the three holding grooves formed in the guide groove 395a.

The retractable handle 372x is formed to have a width smaller than the distance between the side plates of the front side support member 361 described above. Further, the retractable handle 372x is disposed so that its front end protrudes toward the front side of the guide bracket 395 .

In this configuration, when the retractable handle 372x is slightly lifted, the guide pin 397 mounted on the slider 396 is disengaged from the retaining groove of the guide groove 395a, so that the retractable handle 372x is moved in the front-rear direction. can be moved by slide. Therefore, it is possible to switch stepwise between a use position in which the front end of the retractable handle 372x projects slightly forward from the front end of the driver's seat 39 and a stowed position in which approximately the entirety is accommodated under the driver's seat 39. have. Fig. 16 shows a state in which the two guide pins 397 enter the holding grooves at the front end and the central portion of the guide groove 395a, and the retractable handle 372x is in the use position. By press-fitting the retractable handle 372x rearward from this use position, it can be set as the said storage position, and it can prevent the operator who goes up and down to the turning work vehicle 1 from obstruction.

As described above, in the present embodiment, the retractable handle 372x is slidable and can be accommodated in the space formed between the bonnet 38 and the driver's seat 39 by moving to one side. .

Thereby, it is a simple operation which slides the retractable handle 372x, and can be accommodated as needed.

Although preferred embodiment of this invention was described above, said structure can be changed as follows, for example.

The travel speed stage changeover switch 155 may be arranged side by side in the left-right direction with respect to the travel operation levers 36L and 36R. Moreover, the travel speed stage changeover switch 155 may be arrange|positioned at the upper rear surface.

The travel speed stage changeover switch 155 may be configured as an electric switch of another type instead of the rocker switch.

The lamp 58 may be disposed in the vicinity of the travel speed stage changeover switch 155 on the upper surface of the control box 152 , for example, instead of the configuration incorporated in the travel speed stage selector switch 155 .

The position of each operation member can be changed suitably. For example, you may arrange|position the pedal 156 for power take-off on the right side of the control box 152. As shown in FIG.

Although the 1st plate 66 in which the cam groove 88 is formed is formed integrally with the baseplate 64 in said embodiment, it may be comprised as another component.

The cam groove 88 may be formed as a groove rather than a penetrating shape. In addition, the cam groove 88 is not limited to setting it as the above-mentioned shape, It is conceivable to set it as the length of the cam arm 81, etc., setting it as various shapes.

The guide projection 83 , the spring receiving member 84 , etc. may be integrally formed with the cam arm 81 .

The positional relationship of the 1st support plate 61, the cam arm 81, the torsion coil spring 86, etc. may be left and right reverse.

The console box 52 may be provided only in either one of the left and right instead of one pair of left and right.

It is not necessary that all of the 2nd connection parts 272 are arrange|positioned inside the 1st virtual circle C1, You may change so that only a part may be arrange|positioned inside the 1st virtual circle C1.

As a structure which detects the opening and closing of the bonnet 38, instead of the bonnet switch 275, various sensors, such as an optical sensor and a potentiometer, can be used, for example. Also as a configuration for detecting the posture of the console box 52, instead of the electric switch 94, other various sensors can be used.

You may control so that the controller which consists of a computer is provided, and this controller detects the opening and closing of the bonnet switch 275 and the electric switch 94 by a sensor, and controlling the opening and closing of the solenoid valve 264.

The safety frame 266 may further be provided with a canopy.

In the above embodiment, the belt 372 and the retractable handle 372x are configured to protrude forward so that the hand can be hung from the front of the bonnet 38 . However, instead of this, the belt 372 or the retractable handle 372x may be mounted so as to protrude from the bonnet 38 in at least one of the left and right sides. However, it is preferable if both the knobs are disposed on the front side of the bonnet 38 (away from the rotation shaft 245c) because the bonnet 38 can be opened with a light force.

In the above embodiment, as the lock release handle 371, a rod-shaped lever that rotates about an axis in the front-rear direction is used. However, as the unlocking handle, for example, a flap-shaped handle rotating about an axis in the left-right horizontal direction may be used. Also in this case, it is preferable to set it as the structure in which the lock release of the bonnet 38 is implemented by pulling up the handle.

In the first embodiment, an adjustment mechanism capable of adjusting the length of the belt 372 according to the size of the operator's hand may be provided in the buckle portion of the belt 372, for example. Also, instead of the belt 372, for example, a rope may be used.

In the first embodiment, in the upper surface of the bonnet 38, a recess in which the belt 372 press-fitted backward can be accommodated may be formed.

Another member may be sufficient as the operation member for releasing the lock of the bonnet 38, and the knob which grabs in order to rotate the bonnet 38.

In the second embodiment, the slide mechanism 390 may be changed to a configuration in which the rod is slidably supported by, for example, a cylinder.

INDUSTRIAL APPLICABILITY The present invention is applicable not only to a turning work vehicle, but also to a work vehicle having various other configurations and uses.

One ; Turning work vehicle (work vehicle)
52 ; console box
55 ; box body
56 ; lock lever
66 ; 1st plate (guide member)
65 ; Operation operation lever (operation lever)
74; Gas damper (elastic support member)
79 ; lock cam
81; cam arm
82; arm body
83 ; Guide projection (insertion part)
84; Spring receiving member (center side protrusion)
86 ; torsion coil spring
88 ; cam home

Claims (16)

A work vehicle comprising a console box, comprising:
The console box is
a box body rotatable between a first posture and a second posture protruding from the first posture;
an operation lever disposed to protrude from the box body;
a rotatable lock lever disposed to protrude from the box body;
an elastic support member for elastically supporting the box body toward the second posture side;
a lock cam for locking rotation of the box body in both the first posture and the second posture;
The lock cam is
a guide member having a cam groove formed therein;
and a cam arm that rotates integrally with the lock lever;
The cam arm includes an insertion part inserted into the cam groove,
a torsion coil spring for elastically supporting the cam arm is disposed so as to connect the cam arm and the guide member;
The cam arm reverses the rotational direction by the elastic force of the torsion coil spring while the insertion part moves along the cam groove,
The work vehicle, wherein the coil portion of the torsion coil spring is disposed on a side closer to the left and right center of the box body than the guide member. The method of claim 1,
The cam arm is
a plate-shaped arm body disposed on a side closer to the left and right center of the box body than the guide member;
and a central protrusion protruding from the arm body toward a side closer to the left and right center of the box body;
and one end of a spring wire of the torsion coil spring is mounted to the guide member, and the other end is mounted to the central protrusion. 3. The method of claim 2,
The coil portion of the torsion coil spring is located above a position at which the spring wire is mounted to the guide member, both when the box body is in the first posture and in the second posture. work vehicle with The method of claim 1,
The work vehicle is
and a bonnet which is rotatably supported around a rotation shaft disposed at the rear of the engine and covers the engine,
The console box is rotatably supported with respect to the bonnet, and is switchable from the first posture to the second posture by rotating in the same direction as a rotational direction for opening the bonnet, and the second posture by rotating in the opposite direction. It is possible to switch from the posture to the first posture,
In addition, the work vehicle,
a lock portion that validates the operation of the operation lever when the console box is in the first posture and the bonnet is in a closed state, and invalidates operation of the operation lever when the console box is in the closed state;
and a safety device for preventing opening and closing of the bonnet when the console box is in the first posture and allowing opening and closing of the bonnet when the console box is in the second posture. 5. The method of claim 4,
have a driver's seat,
The safety device is
A pair of posts arranged at intervals in the width direction of the driver's seat;
and a regulating unit for connecting the posts to each other,
Let the distance between the center of rotation of the bonnet and the tip of the operating lever in the first posture be a radius, and a virtual circle centered on the center of rotation of the bonnet as a first virtual circle;
When the distance between the center of rotation of the bonnet and the tip of the operating lever in the second posture is a radius, and an imaginary circle centered on the center of rotation of the bonnet as a second imaginary circle,
At least a portion of the regulating part is disposed inside the first virtual circle,
The work vehicle according to claim 1, wherein the entirety of the regulating portion is disposed outside the second virtual circle. 6. The method of claim 5,
When the distance between the center of rotation of the console and the tip of the operating lever is a radius, and a virtual circle centered on the center of rotation of the console when the bonnet is closed is a third virtual circle,
The work vehicle, characterized in that the regulating unit is disposed outside the third virtual circle. 7. The method according to claim 5 or 6,
The work vehicle according to claim 1, wherein the regulating portion is formed so as to become forward as it approaches the connecting point of the post road from the longitudinal middle portion. The method of claim 1,
An openable and openable bonnet which is rotatably supported about a rotational shaft located at the rear of the engine and covers the engine;
a first handle disposed on the front surface of the bonnet;
and a second handle disposed on the bonnet at a position higher than the first handle. 9. The method of claim 8,
and a driver's seat mounted on the upper surface of the bonnet,
At least a part of the second handle is accommodated in a space formed between the bonnet and the driver's seat. 10. The method of claim 9,
The second handle is a long and thin band having flexibility,
Both longitudinal ends of the second handle are mounted on the bonnet, and the middle portion is receivable in the space. 10. The method of claim 9,
The second handle is slidably movable and can be accommodated in the space by moving to one side. 12. The method according to any one of claims 8 to 11,
a lock mechanism capable of being locked in a closed state of the bonnet and capable of releasing the lock by operating the first handle;
wherein the lock mechanism is unlocked by an operating force for operating the first handle in a direction for opening the bonnet. The method of claim 1,
The operation lever is disposed on each of the left and right sides of the driver's seat,
The work vehicle is
a control box formed to protrude upwardly from the floor surface in front of the driver's seat;
a traveling speed stage switching device operated by an operator to switch the traveling speed stage;
The work vehicle, characterized in that the traveling speed stage switching device is formed above the control box. 14. The method of claim 13,
and a display device for displaying an operation state of the traveling speed stage switching device is disposed in the control box. 15. The method according to claim 13 or 14,
and a traveling lever disposed on the control box,
and the traveling speed stage switching device is disposed at a position deviated from the traveling lever in the left-right direction of the control box. 15. The method according to claim 13 or 14,
A first port and a second port for driving the attachment working machine,
and a foot pedal for an operator to operate the attachment working machine with a foot,
When the foot pedal is operated to one side from the neutral position, hydraulic oil is supplied to the first port, and when the foot pedal is operated to the opposite side, hydraulic oil is supplied to the second port.

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