JP7399840B2 - work equipment - Google Patents

Description

The present invention relates to a working machine such as a backhoe.

Conventionally, a working machine disclosed in Patent Document 1 has been known.
The working machine disclosed in Patent Document 1 is provided with a bonnet that covers an engine and the like on the machine body, and a rear part of the bonnet is supported on the machine body via a hinge device so as to be openable and closable. The hinge device includes a support bracket fixed to the fuselage side, a hinge member fixed to the hood side, and a pivot pin that is inserted through the hinge member and the support bracket to rotatably connect the two. The spindle pin is supported via a biasing means that urges either the hinge member or the spindle pin in a direction to be inserted into the other.

Patent No. 3148634

In the above-mentioned working machines, a large amount of force is required not only when opening the bonnet but also when closing it, so a mechanism that assists with the necessary force both when opening and closing the bonnet has been desired. . However, the biasing means provided in the working machine is not capable of supporting the necessary force both when opening and closing the bonnet.
The present invention has been made in view of the above problems, and provides a working machine that can assist with the necessary force both when opening and closing the bonnet.

A work machine according to one aspect of the present invention includes a prime mover mounted on a machine body, and a work machine that covers an upper part of the prime mover, opens by rotating in a first direction about a horizontal axis, and rotates in a second direction about the horizontal axis. a driver's seat supported on the hood and rotating around the horizontal axis together with the hood; and a rotating part including the bonnet and the driver's seat that rotates around the horizontal axis. an auxiliary mechanism that biases an auxiliary spring force, the auxiliary mechanism assists the rotation in the first direction when the center of gravity of the rotating part is located in front of the rear end of the body; The rotation in the second direction is assisted when the center of gravity of the rotation part is located behind the rear end of the body .

According to the working machine according to the present invention, the spring force applied by the auxiliary mechanism can assist the necessary force both when opening and closing the bonnet.

It is a front view of a driver's seat, an operating device, etc. FIG. 3 is a side view showing the internal structure of the operating device. FIG. 3 is a rear perspective view showing the internal structure of the operating device. FIG. 2 is a front perspective view showing a hood, a first operating device, and the like. FIG. 3 is a side view showing the arrangement of hydraulic hoses, etc. FIG. 3 is a front perspective view showing a seat bracket, a seat belt support, an operating bracket, a first operating device, and the like. FIG. 3 is a rear perspective view showing the arrangement of hydraulic hoses, etc. It is a front perspective view showing a hydraulic oil tank, a hydraulic hose, etc. It is a rear perspective view showing a hydraulic oil tank, a hydraulic hose, etc. It is a rear perspective view of a fuselage etc. FIG. 3 is a side view of the hood when it is in the closed position. It is a side view which shows the closed position and open position of a bonnet. It is a rear perspective view of an auxiliary mechanism. FIG. 3 is a front perspective view of the auxiliary mechanism. FIG. 3 is a rear view of the auxiliary mechanism. FIG. 6 is a side view of the auxiliary mechanism when the bonnet is in the closed position. FIG. 6 is a side view of the auxiliary mechanism when the bonnet is in the open position. FIG. 6 is a side view of the auxiliary mechanism when the bonnet is in an intermediate position between an open position and a closed position. It is a side view of a locking mechanism. FIG. 3 is a front perspective view of the locking mechanism. It is a perspective view showing a receiving member, a step board, a mounting bracket, etc. FIG. 2 is a front perspective view showing a seat bracket, a seat belt support, an operation bracket, and the like. FIG. 3 is a rear perspective view showing a seat bracket, a seat belt support, an operation bracket, and the like. FIG. 3 is a diagram showing a state in which the operating device of the work machine is flipped up. It is a side view showing one embodiment of a work machine.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a work machine according to the present invention will be described based on the drawings.
FIG. 25 is a side view showing one embodiment of the working machine 1 according to the present invention. The work machine 1 according to this embodiment is a backhoe that is a swing work machine.
The work machine 1 includes a body 2, a traveling device 3, and a work device 4. A driver's seat 5 is provided on the aircraft body 2. Hereinafter, the front side of the worker seated in the driver's seat 5 (the left side in FIG. 25) is the front, the back side of the worker (the right side in FIG. 25) is the rear, the left side of the worker (the near side in FIG. 25) is the left, The right side of the worker (the back side in FIG. 25) will be described as the right side. In addition, the horizontal direction, which is a direction perpendicular to the longitudinal direction, will be described as the fuselage width direction. Further, the direction from the center of the fuselage 2 toward the right or left side will be described as the outward direction of the fuselage. In other words, the outside of the fuselage is the width direction of the fuselage, and is the direction away from the fuselage 2. The direction opposite to the outside of the fuselage will be described as inside the fuselage. In other words, the inside of the fuselage is the width direction of the fuselage, and the direction approaching the fuselage 2.

The body 2 is supported on the frame of the traveling device 3 via a bearing body so as to be freely pivotable around a vertical axis (an axis in the vertical direction). The fuselage 2 has a rotating base plate 6 and a weight 7. The turning base plate 6 turns by being driven by a turning motor (not shown) consisting of a hydraulic motor. A step plate 26 is arranged above the turning base plate 6 on which a worker seated in the driver's seat 5 can place his or her feet. The space between the rotating base plate 6 and the step plate 26 is covered with a side cover 27.

A working device 4 is attached to the front part of the body 2. A weight 7 is attached to the rear of the machine body 2 in order to balance the weight with the working device 4. A bonnet 8 is arranged above the fuselage 2.
A driver's seat 5 is arranged above the hood 8. Inside the bonnet 8, a prime mover 10, a hydraulic pump (not shown), a hydraulic oil tank (oil tank) 9, and the like are arranged. The hydraulic oil tank 9 stores hydraulic oil for driving the working device 4 . Although a diesel engine is used as the prime mover 10 in this embodiment, the present invention is not limited to this, and it may be, for example, another internal combustion engine such as a gasoline engine, or an electric motor.

The traveling device 3 is a crawler-type traveling device, and is provided below the right side and the left side of the aircraft body 2, respectively. The traveling device 3 is driven by a traveling motor 28 consisting of a hydraulic motor. A dozer 11 is provided at the front of the traveling device 3. The dozer 11 is driven by a dozer cylinder (not shown).
The work device 4 includes a boom 12, an arm 13, and a work tool (bucket) 14. Furthermore, the working device 4 has a boom cylinder 15, an arm cylinder 16, and a working tool cylinder 17 as drive mechanisms for these booms and the like. The boom cylinder 15, arm cylinder 16, work tool cylinder 17, and dozer cylinder are constituted by hydraulic cylinders. These hydraulic cylinders (hydraulic actuators) are driven by hydraulic oil supplied from the hydraulic oil tank 9 via a hydraulic pump. The work device 4 is operated by an operating device 30, which will be described later.

The base end of the boom 12 is pivotally supported by a swing bracket 18 provided at the front of the body 2 so as to be swingable around a horizontal axis. The swing bracket 18 is pivotally supported around a vertical axis with respect to a support bracket 29 provided on the body 2. A swing cylinder (not shown) made of a hydraulic cylinder is attached to the body 2, and the swing bracket 18 swings by being driven by the swing cylinder. A base end of an arm 13 is pivotally supported at the distal end of the boom 12 so as to be swingable about a horizontal axis. A working tool 14 is attached to the tip of the arm 13.

The boom cylinder 15 connects the swing bracket 18 and a midway portion of the boom 12. The boom 12 swings up and down as the boom cylinder 15 expands and contracts. The arm cylinder 16 connects the midway portion of the boom 12 and the base end portion of the arm 13. The arm 13 swings up and down as the arm cylinder 16 expands and contracts. The work tool cylinder 17 connects the base end of the arm 13 and the attachment part of the work tool 14. The work tool 14 performs a scoop/dump operation by expanding and contracting the work tool cylinder 17.

A rope 24 is provided on the fuselage 2 to protect a worker seated in the driver's seat 5. A control tower 20 is provided at the front of the step plate 26 and in front of the driver's seat 5 and the bonnet 8. The control tower 20 is provided with a travel lever 22. The travel lever 22 is a lever that operates the travel device 3. The control tower 20 is also provided with a dozer lever 60 that drives the dozer cylinder and an accelerator lever 61 that controls the rotation of the prime mover 10.

A valve unit 21 is arranged inside the control tower 20. The valve unit 21 is formed by integrating a plurality of control valves that control the hydraulic actuators of the working device 4 in parallel in the width direction of the machine body. The control valves constituting the valve unit 21 include, for example, a swing valve for a swing motor, an arm valve for the arm cylinder 16, a boom valve for the boom cylinder 15, a work tool valve for the work tool cylinder 17, and right and left travel valves. It consists of a travel valve for the motor 28, a speed change valve for changing the speed of the travel motor 28, a dozer valve for the dozer cylinder, a swing valve for the swing cylinder, etc.

Among the control valves, the travel valve, dozer valve, speed change valve, and swing valve are mechanical control valves to which operating force is transmitted via links or the like. The travel lever 22 and the dozer lever 60 are mechanically connected to a control valve via a link mechanism or the like. Specifically, the travel lever 22 is connected to a travel valve. The dozer lever 60 is connected to the dozer valve. The swing valve is mechanically connected to a swing pedal located on the right side of the control tower 20. The speed change valve is mechanically connected to a speed change pedal located on the left side of the control tower 20.

The swing valve, arm valve, boom valve, and work tool valve are hydraulic valves that are operated by the pressure of pilot oil supplied from a hydraulic pump (pilot pump). The swing valve, arm valve, boom valve, and work tool valve are connected to a pilot valve (remote control valve) via a hydraulic hose (pilot hose). In the case of this embodiment, the pilot valves are a first pilot valve 32L and a second pilot valve 32R, which will be described later.
<Operating device>
As shown in FIGS. 1, 2, 25, etc., an operating device 30 is disposed on the side of the driver's seat 5 and above the hood 8. As shown in FIGS. As shown in FIG. 24, the operating device 30 is configured to be able to flip up the front portion by rotating around a support shaft 33 extending in the width direction of the machine body. The support shaft 33 is arranged at the rear of the operating device 30. The operating device 30 is changeable between a first position (see FIG. 25) in which the front portion is not flipped up and a second position (see FIG. 24) in which the front portion is flipped up. Hereinafter, unless otherwise specified, the positional relationship of each component will be described with reference to when the operating device 30 is in the first position.

As shown in FIG. 1, the operating device 30 includes a first operating device 30L and a second operating device 30R. The first operating device 30L is arranged on one side (left side) of the driver's seat 5. The second operating device 30R is arranged on the other side (right side) of the driver's seat 5. The first operating device 30L is a device for swing operation and arm operation. The second operating device 30R is a device for boom operation/bucket operation.

Since the first operating device 30L and the second operating device 30R have most of the same configuration, the configuration of the first operating device 30L will be explained first, and later the second operating device 30R will be explained which is different from the first operating device 30L. Explain the point.
As shown in FIGS. 1 and 2, the first operating device 30L includes an operating lever (first operating lever) 31L, a control valve (first pilot valve) 32L, and a casing (first casing) 34L.

The first operating lever 31L is arranged at the front of the first operating device 30L. The first operation lever 31L is attached to the upper part of the first casing 34L, and is able to swing forward, backward, left, and right. The first pilot valve 32L is housed inside the first casing 34L. A wrist rest 55 is attached to the upper part of the first casing 34L.

The first pilot valve 32L is operated by the first operating lever 31L. The first pilot valve 32L controls the supply of pilot oil that operates the control valves that constitute the valve unit 21. A plurality of hydraulic hoses (first pilot hoses) 35L are connected to the first pilot valve 32L. In the case of this embodiment, there are six first pilot hoses 35L. The first pilot hose 35L connects the first operating device 30L and the valve unit 21, and allows pilot oil for operating the control valves forming the valve unit 21 to flow therethrough.

As shown in FIG. 2, the first pilot valve 32L includes a valve body 36 and a block 37. The valve body 36 is operated by swinging the first operating lever 31L. Specifically, the valve body 36 has a built-in spool (not shown) that is moved by the swinging operation of the first operating lever 31L. The block 37 incorporates a plurality of oil passages 38 through which oil selectively flows through operation of the valve body 36 (by movement of the spool).

The block 37 has an upper surface 37a that is a surface on the valve body 36 side, and a peripheral surface extending from the periphery of the upper surface 37a in a direction intersecting the upper surface 37a. In the case of this embodiment, the block 37 is formed in the shape of a rectangular parallelepiped. Therefore, the block 37 has a lower surface 37b facing downward (lower side of the fuselage), a front face 37c facing forward (front side of the fuselage), a rear face 37d facing rearward (backward side of the fuselage), and a left side (left side of the fuselage). ), and a right surface 37e facing right (toward the right side of the fuselage).

Inside the first casing 34L, the block 37 is located on the extension line of the swing center axis 31La of the operating levers 31L, 31R (in the axial direction of the shafts forming the operating levers 31L, 31R at the connection portion with the valve body 36). Moreover, it is arranged below the valve body 36. The plurality of oil passages 38 are bent into an L-shape so as to connect a first port 37f provided on the upper surface 37a of the block 37 and a second port 37g provided on the peripheral surface of the block 37. There is. In the case of this embodiment, the second port 37g is provided on the rear surface 37d of the block 37. The number of first ports 37f and second ports 37g corresponds to the number of first pilot hoses 35. In the case of this embodiment, six first ports 37f and six second ports 37g are provided, and six oil passages 38 are formed. By moving the spool of the valve body 36 by swinging the first operating lever 31L, the ports and oil passages 38 through which oil flows are selected (switched).

The first port 37f of the block 37 is connected to the valve body 36. One end of the first pilot hose 35L is connected to the second port 37g of the block 37 via a pipe joint 39. As shown in FIG. 3, the pipe joint 39 is a straight pipe joint, and extends rearward in a straight line from the second port 37g. A plurality of (six) first pilot hoses 35L are connected to a plurality of (six) second ports 37g via pipe joints 39, respectively. A plurality of (six) first pilot hoses 35L connected to each second port 37g are arranged so as to extend from each second port 37g in a direction (rearward) away from the peripheral surface (rear surface 37d) of the block 37. ing. In other words, all of the plurality of first pilot hoses 35L of the first operating device 30L are connected to the second port 37g of the block 37 and are arranged so as to extend in a direction (rearward) away from the peripheral surface (rear surface 37d). There is.

The plurality of (six) first pilot hoses 35L are bundled into one first hose bundle 40L inside the first casing 34L. The first hose bundle 40L may be in the form of a plurality of first pilot hoses 35L tied together with a cable tie or the like, or may be in the form of a plurality of first pilot hoses 35L inserted into one thick tube. You can.
The other end of the first pilot hose 35L is connected to a control valve that constitutes the valve unit 21. Of the six first pilot hoses 35L, two are connected to the boom valve and two are connected to the work tool valve. The remaining two are connected via the valve unit 21 (or directly) to a pilot pump and a drain, respectively.

As shown in FIGS. 2, 3, and 4, the first operating device 30L has a bracket (first bracket) 41L that supports a first operating lever 31L and a first pilot valve 32L. The first bracket 41L is housed in the first casing 34L. The rear part of the first bracket 41L is rotatably supported by a support shaft 33. The support shaft 33 is supported on the body 2 (specifically, on the bonnet 8) by an operation bracket 140.

As shown in FIG. 4, the first bracket 41L has a front portion 41a, a rear portion 41b, and a connection portion 41c. The front portion 41a is a portion located at the front of the first bracket 41L, and supports the block 37. The rear portion 41b is a portion located at the rear of the first bracket 41L, and is supported by the support shaft 33. The connection part 41c connects the front part 41a and the rear part 41b.

As shown in FIGS. 3 and 4, the first bracket 41L has a pair of side plates 42 spaced apart from each other in the width direction of the body. The front portions of the pair of side plates 42 are included in the front portion 41a. The rear portions of the pair of side plates 42 are included in the rear portion 41b. A midway portion in the front-rear direction of the pair of side plates 42 is included in the connection portion 41c. The pair of side plates 42 includes an inner side plate 42A disposed on the inner side of the body (on the driver's seat 5 side) and an outer side plate 42B disposed on the outer side of the body (on the side opposite to the driver's seat 5). The block 37 is fixed between the inner side plate 42A and the outer side plate 42B and supported by the first bracket 41L. The support shaft 33 extends between the inner side plate 42A and the outer side plate 42B.

As shown in FIGS. 2, 3, 4, 5, etc., the first operating device 30L has a lock lever (first lock lever) 43L. The first lock lever 43L is a lever held by the operator when changing the position of the first operating device 30L between the first position (see FIG. 25) and the second position (see FIG. 24). By pulling up the first lock lever 43L, the first operating device 30L can be changed from the first position to the second position, and by pushing down the first lock lever 43L, the first operating device 30L can be changed from the second position to the first position. The position can be changed.

A base end portion of the first lock lever 43L is connected to a cam plate 44 having a cam slot 44a. The upper end of the cam plate 44 is pivotally supported by a swing plate 46 via a first pivot shaft 45 . The swing plate 46 is pivotally supported by the first bracket 41L via a second pivot shaft 47. A pin 48 is inserted into the cam slot 44a.
The pin 48 extends outward from a fixing plate 49 (see FIGS. 4 and 6) fixed to the operation bracket 140. The fixed plate 49 has an upper part connected to the operating bracket 140 by a connecting shaft 50, and a lower part connected to the operating bracket 140 by welding or the like. The operation bracket 140 is provided with a mounting shaft 51 to which one end of a biasing member (not shown) such as a gas cylinder is mounted. The other end of the biasing member is connected to the lower part of a front bracket 52 attached to the front part of the first bracket 41L. The biasing member has a biasing force that assists the force required when rotating the operating device 30 from the first position to the second position.

The pin 48 moves within the cam slot 44a as the first lock lever 43L moves up and down. As shown in FIG. 2, when the first lock lever 43L is in the lowered position (when the first operating device 30L is in the first position), the pin 48 is located in the upper part 44a1 of the cam slot 44a. When the first lock lever 43L is in the raised position (when the first operating device 30L is in the second position), the pin 48 is located in the lower part 44b2 of the cam slot 44a. Note that in this embodiment, when the first operating device 30L is in the second position, a portion of the first operating device 30L other than the first lock lever 43L (for example, the operating lever 31L or the wrist rest 55) is operated. However, the pin 48 cannot be removed from the lower part 44b2 of the cam slot 44a, and the first operating device 30L is held at the second position. In other words, the first operating device 30L cannot be moved from the second position to the first position unless the first lock lever 43L is operated.

As shown in FIG. 2 and the like, the first operating device 30L is provided with a switch 53 such as a limit switch. The switch 53 is attached to the first bracket 41L. The switch 53 rotates around the support shaft 33 together with the first bracket 41L as the first lock lever 43L is pulled up. The switch 53 comes into contact with a detection plate 54 fixed to the body 2 side (bonnet 8) when the first operating device 30L is in the second position. Thereby, it is detected that the first operating device 30L is in the second position.

When it is detected that the first operating device 30L is in the second position, an unload valve (not shown) is turned on, and the supply of hydraulic oil to the working device 4 is stopped. When the first operating device 30L is in the first position, the unload valve is in the OFF state, so the supply of hydraulic oil to the working device 4 is permitted. As a result, when the first lock lever 43L is in the lowered position (when the first operating device 30L is in the first position), the working device 4 can be driven, and when the first lock lever 43L is in the upper position ( When the first operating device 30L is in the second position), the working device 4 cannot be driven.

As shown in FIG. 4, the first pilot hose 35L extends from the front part 41a side to the rear part 41b side along the lower part of the connection part 41c of the first bracket 41L. The first pilot hose 35L has a curved portion 59 (see FIG. 2) that curves downward. The curved portion 59 is arranged above the support shaft 33. Specifically, the curved portion 59 is arranged above and in front of the support shaft 33. Further, the curved portion 59 passes between the support shaft 33 and the pin 48. Further, the curved portion 59 passes between the pin 48 and the first pivot shaft 45 . The first pilot hose 35L is inserted into the bonnet 8 through an opening 80 formed in the bonnet 8 after curving downward at the bending portion 59.

The opening 80 of the bonnet 8 is provided behind the block 37 and in front of the support shaft 33. Thereby, the first pilot hose 35L is inserted into the bonnet 8 from the opening 80 in front of the support shaft 33. Specifically, the first pilot hose 35L is inserted into the bonnet 8 through the opening 80 at a position between the block 37 and the support shaft 33 in the front-rear direction.

Next, the second operating device 30R will be explained.
Regarding the second operating device 30R, the explanation will focus on the points that are different from the first operating device 30L, and the explanation of the common configuration will be omitted.
The first operating device 30L and the second operating device 30R are different only in that they are configured laterally symmetrically and that the operating objects are different, and the other configurations are common.

To explain the former difference, the first operating device 30L and the second operating device 30R are configured to be symmetrical with respect to the center line CL1 (see FIG. 1) in the body width direction. To explain the latter difference, the second operating device 30R is a boom/bucket operating device as described above, so two of the six second pilot hoses 35R of the second operating device 30R are connected to the swing valve. The two are connected to the arm valve.

Other than these differences, the configuration of the second operating device 30R is the same as the configuration of the first operating device 30L. That is, the second operating device 30R has a configuration corresponding to the configuration of the first operating device 30L described above. Specifically, by changing "first" to "second" and changing "L" to "R" in the configuration of the first operating device 30L described above, the configuration becomes the second operating device 30R. For example, the second operating device 30R has a configuration corresponding to the first operating lever 31L, first casing 34L, first bracket 41L, and first pilot valve 32L of the first operating device 30L, respectively. 2 casing 34R, a second bracket 41R, and a second pilot valve 32R. The corresponding configurations of the first operating device 30L and the second operating device 30R are the same except for the above-mentioned differences.

Although not shown, a plurality of (six) second pilot hoses 35R are connected to the second pilot valve 32R of the second operating device 30R. The second pilot hose 35R connects the second operating device 30R and a control valve that constitutes the valve unit 21. The second pilot hose 35R is bundled into a second hose bundle 40R inside the second casing 34R. As shown in FIG. 7, a second hose bundle 40 made up of a plurality of second pilot hoses 35R is inserted into the bonnet 8. As shown in FIG.
<Pilot hose arrangement>
The opening 80 of the bonnet 8 includes a first opening 80L (see FIG. 4) formed on the upper left surface of the bonnet 8, and a second opening 80R (see FIG. 6) formed on the upper left surface of the bonnet 8. including. Note that the second operating device 30R is omitted in FIGS. 4 and 6. The first pilot hose 35L is inserted into the bonnet 8 through the first opening 80L, and the second pilot hose 35R is inserted into the bonnet 8 through the second opening 80R.

As shown in FIG. 5, the first pilot hose 35L inserted into the bonnet 8 extends rearward along the lower surface of the upper plate 8a of the bonnet 8, and then curves at the rear part of the bonnet 8 and extends downward. It extends towards. Although not shown, the same applies to the second pilot hose 35R.
As shown in FIG. 7, the first pilot hose 35L and the second pilot hose 35R extend inside the bonnet 8 in a left part and a right part. The first pilot hose 35L and the second pilot hose 35R extend separately on the left and right sides of the horizontal shaft 62, which is the rotation axis of the bonnet 8. More specifically, the first pilot hose 35L passes to the left of a first horizontal axis 62L, which will be described later. The second pilot hose 35R passes to the right of a second horizontal axis 62R, which will be described later.

As shown in FIGS. 5 and 7, the first pilot hose 35L passes through the left side of the hydraulic oil tank 9 and extends downward. The second pilot hose 35R passes behind the hydraulic oil tank 9, moves from the right side of the hydraulic oil tank 9 to the left side, and then extends downward through the left side of the hydraulic oil tank 9. The hydraulic oil tank 9 is arranged behind the prime mover 10 and in front of the weight 7 (see FIG. 25). The second pilot hose 35R passes between the hydraulic oil tank 9 and the weight 7, and extends from the right to the left inside the bonnet 8.

As shown in FIGS. 5, 7, 8, and 9, the hydraulic oil tank 9 has a viewing window 90 and a cylindrical portion 91. The viewing window 90 is a window through which the hydraulic oil in the hydraulic oil tank 9 can be viewed. The viewing window 90 is made of a transparent plate such as a glass plate. The viewing window 90 functions as an oil gauge for checking the amount of hydraulic oil (oil level) stored in the hydraulic oil tank 9. As shown in FIG. 10, the viewing window 90 is visible from the outside of the aircraft body 2 through an opening 7a formed on the left side of the weight 7.

A viewing window 90 is attached to a cylindrical portion 91. The viewing window 90 is fitted into the inside of the cylindrical part 91 at the tip of the cylindrical part 91, and allows the hydraulic oil in the hydraulic oil tank 9 to be visually checked through the internal space of the cylindrical part 91. There is. The cylindrical portion 91 protrudes from the wall surface (left wall surface) of the hydraulic oil tank 9. The cylindrical portion 91 is preferably cylindrical as shown, but may also be elliptical or prismatic. In the case of the present embodiment, the cylindrical portion 91 has a cylindrical shape having an axis extending in a substantially horizontal direction, and protrudes leftward from the left wall surface of the hydraulic oil tank 9 .

The protruding length of the cylindrical portion 91 (the protruding length from the wall surface of the hydraulic oil tank 9) is preferably set to be greater than or equal to the outer diameter of the hydraulic hoses (first pilot hose 35L, second pilot hose 35R). In this case, the protruding length of the cylindrical portion 91 may be set to be greater than or equal to the outer diameter of at least one hydraulic hose (first pilot hose 35L, second pilot hose 35R), but It is preferable to set the diameter to be greater than or equal to the outer diameter of the first hose bundle 40L, which is made up of a plurality of second pilot hoses 35R, and the outer diameter of the second hose bundle 40R, which is made up of a plurality of second pilot hoses 35R. Further, the outer diameter of the cylindrical portion 91 is preferably greater than or equal to the outer diameter of the first hose bundle 40L and greater than the outer diameter of the second hose bundle 40R.

The cylindrical portion 91 has an outer surface (outer peripheral surface) 91a that guides the hydraulic hoses (first pilot hose 35L, second pilot hose 35R). By protruding from the wall surface (left wall surface) of the hydraulic oil tank 9, the cylindrical portion 91 allows the hydraulic hoses (first pilot hose 35L, second pilot hose 35R) to contact and guide the outer surface 91a. can.
Hereinafter, for convenience of explanation, the first pilot hose 35L (or the first hose bundle 40L) will be referred to as the first hydraulic hose 35L, and the second pilot hose 35R (or the second hose bundle 40R) will be referred to as the second hydraulic hose 35R. There are cases.

As shown in FIGS. 5, 7, 8, and 9, the first hydraulic hose 35L and the second hydraulic hose 35R are guided along the outer surface 91a of the cylindrical portion 91 on opposite sides of the viewing window 90. has been done. Specifically, the first hydraulic hose 35L is guided along the outer surface 91a of the cylindrical portion 91 on the front side of the viewing window 90, and the second hydraulic hose 35R is guided along the outer surface 91a of the cylindrical portion 91 on the rear side of the viewing window 90. It is guided along the outer surface 91a. This allows the two hydraulic hoses (the first hydraulic hose 35L and the second hydraulic hose 35R) to be guided apart from each other, thereby preventing the hydraulic hoses from interfering with each other or becoming tangled.

As shown in FIGS. 5, 7, 8, and 9, the hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) are guided by a plurality of guide members above and below the cylindrical portion 91. ing. The plurality of guide members include a first guide member 101 , a second guide member 102 , a third guide member 103 , a fourth guide member 104 , a fifth guide member 105 , a sixth guide member 106 , and a seventh guide member 107 . The first guide member 101 to the seventh guide member 107 are constructed by bending round bars. However, the plurality of guide members does not necessarily have to include all of the first to seventh guide members, and one or more guide members may be omitted. Further, other guide members may be added as necessary.

As shown in FIGS. 7, 8, and 9, the first guide member 101 guides the hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) toward the cylindrical portion 91. The first guide member 101 is attached to the hydraulic oil tank 9. The first guide member 101 is attached along the corner edge of the hydraulic oil tank 9. The first guide member 101 is attached along the left rear corner edge of the hydraulic oil tank 9 . The first guide member 101 has a vertical portion 101a that extends in the vertical direction along the corner edge of the hydraulic oil tank 9, and a horizontal portion 101b that is bent from the lower end of the vertical portion 101a and extends rearward. The first hydraulic hose 35L is guided in contact with the vertical portion 101a. The second hydraulic hose 35R is guided in contact with the lateral portion 101b.

As shown in FIGS. 7, 8, and 9, the second guide member 102 guides hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) extending along the cylindrical portion 91. The second guide member 102 is attached to the rotating base plate 6 (see FIG. 25) via a stay 95. The stay 95 is connected to a partition member 96 via a connecting plate 99 (see FIG. 7). The partition member 96 is fixed onto the rotating base plate 6 with bolts. The partition member 96 extends in the body width direction in front of the hydraulic oil tank 9.

The second guide member 102 is fixed to the stay 95 via a mounting plate 97. The mounting plate 97 is fixed to the upper part of the stay 95 with a fixing device (not shown) such as a bolt. The second guide member 102 has a lower portion 102a, an intermediate portion 102b, and an upper portion 102c. The lower portion 102a is attached to the attachment plate 97 and extends below the cylindrical portion 91 in the front-rear direction. The intermediate portion 102b is bent and extends upward from the front end of the lower portion 102a. The intermediate portion 102b extends in front of the cylindrical portion 91 with a length extending from below to above the cylindrical portion 91. The upper portion 102c is bent from the upper end of the intermediate portion 102b and extends to the right (in the direction approaching the hydraulic oil tank 9). The hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) extend between the second guide member 102 and the wall surface (left wall surface) of the hydraulic oil tank 9. The first hydraulic hose 35L extends between the intermediate portion 102b and the wall surface (left wall surface) of the hydraulic oil tank 9, passing below the upper portion 102c. The second hydraulic hose 35R extends between the lower portion 102a and the wall surface (left wall surface) of the hydraulic oil tank 9.

As shown in FIGS. 7, 8, and 9, the third guide member 103 guides a hydraulic hose (first hydraulic hose 35L) extending along the cylindrical portion 91. As shown in FIGS. The third guide member 103 is attached to the rotating base plate 6 via a stay 95. The third guide member 103 is attached to a mounting plate 97 fixed to the top of the stay 95. The third guide member 103 has a vertical portion 103a and a horizontal portion 103b. The vertical portion 103a is attached to the attachment plate 97 and extends in the vertical direction below the second guide member 102. The horizontal portion 103b is bent from the upper end of the vertical portion 103a and extends diagonally forward and to the right. The first hydraulic hose 35L passes between the horizontal portion 103b and the hydraulic oil tank 9 and extends downward.

As shown in FIGS. 7 and 9, the fourth guide member 104 guides the hydraulic hose (second hydraulic hose 35R) toward the cylindrical portion 91. As shown in FIGS. The fourth guide member 104 is attached to an upper plate 98 attached to the upper surface of the hydraulic oil tank 9. The upper plate 98 has a protruding portion 98a that protrudes rearward from the upper surface of the hydraulic oil tank 9, and the fourth guide member 104 is attached to the protruding portion 98a. Therefore, the fourth guide member 104 is arranged at the rear of the hydraulic oil tank 9. The fourth guide member 104 includes a first vertical portion 104a extending upward from the left side of the upper plate 98, a second vertical portion 104b extending upward from the right side of the upper plate 98, and an upper end portion of the first vertical portion 104a. It has a communication part 104c that connects the upper end of the second vertical part 104b. The upper portions of the first vertical portion 104a and the second vertical portion 104b are curved toward the rear. The second hydraulic hose 35R is disposed below the communication portion 104c and behind the first vertical portion 104a and the second vertical portion 104b. The second hydraulic hose 35R contacts the fourth guide member 104 and extends from the right to the left behind the hydraulic oil tank 9.

As shown in FIGS. 5 and 7, the fifth guide member 105, the sixth guide member 106, and the seventh guide member 107 are connected to hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) in the upper part of the bonnet 8. ) is guided from the front to the rear. The fifth guide member 105, the sixth guide member 106, and the seventh guide member 107 are provided at the upper left and upper right portions of the bonnet 8, respectively. The fifth guide member 105 and the seventh guide member 107 are attached to the back surface of the upper plate of the bonnet 8. The sixth guide member 106 is attached to a rear plate member 94 fixed to the rear lower surface of the bonnet 8 .

The fifth guide member 105 is arranged behind the opening 80 formed in the bonnet 8. The sixth guide member 106 is arranged behind the fifth guide member 105. The seventh guide member 107 is arranged from the front to the bottom of the opening 80 . The fifth guide member 105 restricts the movement of the hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) upward and outward from the aircraft body. The sixth guide member 106 restricts the movement of the hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) downward and into the interior of the machine. The seventh guide member 107 restricts forward and downward movement of the hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R).

The first hydraulic hose 35L is inserted into the bonnet 8 from the first opening 80L at the upper left of the bonnet 8, and is attached to the upper plate of the bonnet 8 by the fifth guide member 105, the sixth guide member 106, and the seventh guide member 107. It bends at the left rear inside the bonnet 8 and extends downward, and is guided toward the cylindrical part 91 by the first guide member 101. Then, the second guide member 102 and the cylindrical part 91 The guide member 103 is guided along the outer surface 91a of the front part and extends further downward, and is further guided downward by the third guide member 103.

The second hydraulic hose 35R is inserted into the bonnet 8 from the second opening 80R at the upper right of the bonnet 8, and is attached to the upper plate of the bonnet 8 by the fifth guide member 105, the sixth guide member 106, and the seventh guide member 107. It is bent at the right rear part in the bonnet 8 and extends downward, guided from the right side to the left side by the fourth guide member 104, and guided to the cylindrical part 91 by the first guide member 101. After being guided toward the outer surface 91a of the rear portion of the cylindrical portion 91, it extends further downward, passing through the second guide member 102 and the wall surface of the hydraulic oil tank 9, and further extending downward.

The first hydraulic hose 35L and the second hydraulic hose 35R extending downward are bent at the lower part of the bonnet 8, extend forward, and are connected to a control valve forming the valve unit 21.
<Bonnet opening/closing structure>
As shown in FIG. 11, the body 2 is provided with a horizontal shaft 62 that pivots the bonnet 8 in a rotatable (openable/closable) manner. The horizontal axis 62 extends in the width direction of the machine body. The rear lower part of the bonnet 8 is pivotably supported around the horizontal axis 62 with respect to the body 2. As shown in FIG. 12, the bonnet 8 opens by rotating around the horizontal axis 62 in a first direction (direction of arrow A), and rotates in a second direction (direction of arrow B) around the horizontal axis 62. Close by. Thereby, the bonnet 8 is movable between an open position (the position indicated by the imaginary line in FIG. 12) in which the front portion is raised and a closed position (the position indicated by the solid line in FIG. 12) in which the front portion is lowered.

As shown in FIG. 11, the working machine 1 includes an auxiliary mechanism 110 that assists the force required to open and close the bonnet 8. The auxiliary mechanism 110 applies a spring force that assists the rotation of the bonnet 8 about the horizontal axis 62. The auxiliary mechanism 110 applies a spring force to assist rotation in a first direction (direction of arrow A) when opening the bonnet 8, and applies a spring force to assist rotation in a second direction (direction of arrow B) when closing the bonnet 8. Apply spring force to assist the movement.

As shown in FIGS. 13, 14, and 15, the horizontal axis 62 includes a first horizontal axis 62L located on one side (left side) in the width direction of the aircraft body, and a first horizontal axis 62L located on the other side (right side) in the width direction of the aircraft body. and a second horizontal axis 62R. The first horizontal axis 62L and the second horizontal axis 62R are arranged on the same straight line extending in the machine width direction with an interval in the machine body width direction. The auxiliary mechanism 110 includes a torsion coil spring 111 that is wound around the horizontal shaft 62 and applies the spring force described above. The torsion coil spring 111 includes a first spring 111L wound around a first horizontal axis 62L and a second spring 111R wound around a second horizontal axis 62R.

As shown in FIGS. 13, 14, 15, and 16, the auxiliary mechanism 110 includes a first member 112, a second member 113, and a linking member 114.
The first member 112 is fixed to the body 2. Specifically, the first member 112 is fixed to the weight 7 arranged at the rear of the fuselage 2. The first member 112 has a rear plate 112a, a first side plate 112b, a second side plate 112c, and an upper plate 112d. The rear plate 112a is fixed to the front part of the weight 7 with bolts or the like. The first side plate 112b and the second side plate 112c are spaced apart from each other in the width direction of the machine body, and are connected to the front surface of the rear plate 112a. The first side plate 112b is arranged on one side (left side) in the width direction of the body. The second side plate 112c is arranged on the other side (right side) in the body width direction. The upper plate 112d extends forward from the top of the rear plate 112a.

The first side plate 112b of the first member 112 has a guide hole 112e and an insertion hole 112f. The guide hole 112e is a hole that guides movement of the first shaft 115, which will be described later. The guide hole 112e is formed in a substantially C-shape. The insertion hole 112f is a hole through which the other end 111b of the torsion coil spring 111 (first spring 111L) is inserted. The insertion hole 112f is a long hole extending in an arc shape with the horizontal axis 62 as the center.

The second member 113 is fixed to the bonnet 8. Specifically, the second member 113 is fixed to the bonnet 8 via a rear plate 94 fixed to the rear lower surface of the bonnet 8. The second member 113 is pivotally supported by the horizontal shaft 62 with respect to the first member 112, and is rotatable around the horizontal shaft 62. The second member 113 includes a left member 113L and a right member 113R. The left member 113L has one end fixed to the lower surface of the left portion of the rear plate member 94, extends downward from the lower surface, and then bends toward the rear. The right member 113R has one end fixed to the lower surface of the right portion of the rear plate member 94, extends downward from the lower surface, and then bends toward the rear. The other end of the left member 113L is pivotally supported by the first horizontal shaft 62L. The other end of the right member 113R is pivotally supported by the second horizontal shaft 62R.

The cooperation member 114 has one end attached to the first member 112 by a first shaft 115 and the other end attached to the second member 113 by a second shaft 116. The first shaft 115 is inserted into a guide hole 112e formed in the first member 112. The guide hole 112e guides the movement of the first shaft 115 as the bonnet 8 rotates around the horizontal shaft 62.
The torsion coil spring 111 is locked to a first member 112 and a second member 113. The first member 112 has a first locking portion 112g to which one end of the torsion coil spring 111 is locked. The second member 113 has a second locking portion 113a to which the other end of the torsion coil spring 111 is locked.

As shown in FIG. 14, the first locking portion 112g includes notches 112gL and 112gR provided in the upper plate 112d of the first member 112. As shown in FIG. One end portion 111La of the first spring 111L is locked in the notch 112gL. One end 111Ra of the second spring 111R is locked in the notch 112gR.
As shown in FIG. 16 and the like, the second locking portion 113a is formed of a long hole extending in an arc shape with the horizontal axis 62 as the center. The other end 111b of the torsion coil spring 111 passes through the insertion hole 112f of the first member 112 and is locked in an elongated hole constituting the second locking part 113a. The other end portion 111b of the torsion coil spring 111 moves along the long hole forming the second locking portion 113a as the bonnet 8 is opened and closed. When the bonnet 8 is closed, the other end 111b of the torsion coil spring 111 comes into contact with one end (upper end) of the elongated hole that constitutes the second locking part 113a (see FIG. 16), and the bonnet 8 is closed. When it is open, it comes into contact with the other end (lower end) of the elongated hole (see FIG. 17). Further, when the bonnet 8 is between the open position (fully open position) and the closed position, the other end 111b of the torsion coil spring 111 is located in the middle of the elongated hole that constitutes the second locking part 113a. (See Figure 18).

FIG. 16 shows the state of the auxiliary mechanism 110 when the bonnet 8 is closed. When the bonnet 8 is closed, the first shaft 115 is located at one end (lower side) of the guide hole 112e, and the other end 111b of the torsion coil spring 111 is located in the elongated hole constituting the second locking portion 113a. It is in contact with one end (upper end). In this state, the torsion coil spring 111 applies a spring force in the direction of arrow A (first direction) to the second member 113. Therefore, when the operator opens the bonnet 8, the torsion coil spring 111 applies a spring force that assists the rotation in the first direction (the direction in which the bonnet 8 opens). Thereby, the operator can easily open the bonnet 8 with a small force.

FIG. 17 shows the state of the auxiliary mechanism 110 when the bonnet 8 is open (fully opened). When the bonnet 8 is open, the first shaft 115 is located on the other end side (upper side) of the guide hole 112e, and the other end portion 111b of the torsion coil spring 111 is located in the elongated hole forming the second locking portion 113a. It is in contact with the other end side (lower end side). In this state, the torsion coil spring 111 applies a spring force in the direction of arrow B (second direction) to the second member 113. Therefore, when the operator closes the bonnet 8, the torsion coil spring 111 applies a spring force that assists the rotation in the second direction (the direction in which the bonnet 8 is closed). This allows the operator to easily close the bonnet 8 with a small force.

As described above, the biasing direction of the spring force of the torsion coil spring 111 is the first direction when the bonnet 8 is in the closed position, and the second direction when the bonnet 8 is in the open position. Therefore, the auxiliary mechanism 110 assists the rotation in the first direction (the bonnet opening direction) when opening the bonnet 8, and assists the rotation in the second direction (the bonnet closing direction) when closing the bonnet 8. Can assist.

The auxiliary mechanism 110 is configured such that the biasing direction of the spring force of the torsion coil spring 111 is switched when the bonnet 8 is in an intermediate position between the closed position and the open position. Specifically, when moving (rotating) the bonnet 8 from the closed position to the open position, the biasing direction of the spring force of the torsion coil spring 111 changes from the first direction to the first direction at an intermediate position between the closed position and the open position. It is configured to switch in two directions. Further, when the auxiliary mechanism 110 moves (rotates) the bonnet 8 from the open position to the closed position, the biasing direction of the spring force of the torsion coil spring 111 is adjusted to the intermediate position between the open position and the closed position. It is configured to switch from two directions to a first direction.

More specifically, the auxiliary mechanism 110 assists the rotation in the first direction (the direction in which the bonnet is opened) when the center of gravity of the rotating part that rotates together with the bonnet 8 is located in front of the rear end 2a of the aircraft body 2, When the center of gravity of the rotating part is located behind the rear end 2a of the aircraft body 2, the rotation in the second direction (the direction in which the bonnet is closed) is assisted. In the case of this embodiment, the rotating part that rotates together with the hood 8 includes the hood 8, the driver's seat 5, and the operating device 30. In FIG. 12, when the rotating part that rotates together with the bonnet 8 is in the solid line position (when the bonnet 8 is in the closed position), the center of gravity of the rotating part is forward of the rear end 2a of the fuselage 2, so the The mechanism 110 assists rotation in the first direction (arrow A direction). When the rotating part that rotates with the bonnet 8 is in the imaginary line position (when the bonnet 8 is in the open position), the center of gravity of the rotating part is behind the rear end 2a of the fuselage 2, so the auxiliary mechanism 110 Assists rotation in the second direction (direction of arrow B).

The auxiliary mechanism 110 is in a state in which it assists the rotation in the first direction (a state in which the biasing direction of the spring force of the torsion coil spring 111 is in the first direction) in accordance with the rotation angle of the bonnet 8 around the horizontal axis 62. ) and a state in which rotation in the second direction is assisted (a state in which the biasing direction of the spring force of the torsion coil spring 111 is in the second direction).
In this case, the auxiliary mechanism 110 rotates in the first direction when the rotation angle around the horizontal axis 62 when the bonnet 8 rotates from the closed position to the open position is within the range from the closed position to the first angle. It can be configured to assist the rotation in the second direction when it is in the range from the second angle to the open position. Further, when the rotation angle of the bonnet 8 around the horizontal axis 62 when the bonnet 8 rotates from the closed position to the open position is in the range between the first angle and the second angle, the auxiliary mechanism 110 rotates the bonnet 8. Does not assist rotation.

FIG. 18 shows the state of the auxiliary mechanism 110 when the rotation angle about the horizontal axis 62 when the bonnet 8 rotates from the closed position to the open position is in the range between the first angle and the second angle. ing. At this time, the other end portion 111b of the torsion coil spring 111 is located in the middle of the elongated hole that constitutes the second locking portion 113a. In this state, the torsion coil spring 111 is in a natural state (untwisted state) and does not apply a spring force to the second member 113 in either the first direction or the second direction.

Here, the action (behavior) of the auxiliary mechanism 110 will be explained using a specific example.
The rotation angle of the bonnet 8 around the horizontal axis 62 when the bonnet 8 is in the closed position is 0°, the rotation angle around the horizontal axis 62 when the bonnet 8 is in the open position is 90°, and the first angle is 0°. 35° and the second angle is 55°.
In this case, the auxiliary mechanism 110 assists the rotation in the first direction when the rotation angle of the bonnet 8 around the horizontal axis 62 is in the range from the closed position to the first angle (0° to 35°); When it is in the range between the first angle and the second angle (35° to 55°), rotation is not assisted, and when it is in the range from the second angle to the open position (55° to 90°) Assists rotation in the second direction.

The rotation angle around the horizontal axis 62 when the bonnet 8 is in the open position is not limited to 90 degrees, and may be more than 90 degrees or less than 90 degrees. Furthermore, the values of the first angle and the second angle are not limited to the above specific example, and can be set to appropriate values within the range of 0° to 90°. The magnitude of the second angle is set to be greater than or equal to the magnitude of the first angle (second angle≧first angle).

It is preferable that the second angle is set larger than the first angle (second angle>first angle). This creates a state (neutral state) in which the auxiliary mechanism 110 does not assist the rotation of the bonnet 8 when the bonnet 8 is between the closed position and the open position, so the operability of opening and closing the bonnet 8 is improved. .
However, the first angle and the second angle may be set equal. In this case, the state in which the auxiliary mechanism 110 does not assist the rotation of the bonnet 8 (neutral state) disappears, and the auxiliary mechanism 110 always supports the rotation of the bonnet 8 in the first direction or in the second direction, regardless of the position of the bonnet 8. Assist in direction.

As shown in FIGS. 11, 19, and 20, the working machine 1 includes a locking mechanism 120 that can be held against the machine body 2 with the bonnet 8 closed. The locking mechanism 120 includes a receiving member 121 provided on the body 2, a locking member 122 provided on the bonnet 8, and an operating mechanism 123.
As shown in FIG. 20, the receiving member 121 has one part 121L, the other part 121R, and a connecting part 121M. The one side portion 121L is arranged on one side (left side) in the width direction of the body. The other portion 121R is arranged on the other side (right side) in the body width direction. The one part 121L and the other part 121R each have a proximal end part 121a, a midway part 121b, and a distal end part 121c. The base end portion 121a is located at the lower part of the receiving member 121 and extends in the front-rear direction. The midway portion 121b is bent and extends upward from the rear end of the base end portion 121a. The tip portion 121c extends obliquely upward and backward from the upper end of the midway portion 121b. The connecting portion 121M extends in the width direction of the fuselage, and connects the upper end of the tip portion 121c of the one portion 121L (one end side of the one portion 121L) and the upper end of the tip portion 121c of the other portion 121R (one end side of the other portion 121R). It is connected. A locking member 122 is locked to the connecting portion 121M.

As shown in FIGS. 19 and 21, the receiving member 121 is fixed to a mounting bracket 124. As shown in FIGS. The mounting bracket 124 is attached to the step plate 26. As shown in FIG. 11, the step plate 26 is provided at the front of the aircraft body 2 and in front of the driver's seat 5 (in front of the hood 8). Therefore, the mounting bracket 124 is fixed to the step plate 26 at the front of the aircraft body 2 (in front of the driver's seat 5).

As shown in FIG. 21, the step plate 26 has a left plate portion 26L, a right plate portion 26R, and a center plate portion 26M. The left plate portion 26L is a portion on which a worker seated in the driver's seat 5 places his or her left foot. The right plate portion 26R is a portion on which a worker seated in the driver's seat 5 places his or her right foot. The center plate part 26M is located at a higher position than the left plate part 26L and the right plate part 26R, and connects the left plate part 26L and the right plate part 26R. The mounting bracket 124 is fixed to the center plate portion 26M.

In the receiving member 121, the front part of the proximal end part 121a of the one part 121L (the other end side of the one part 121L) and the front part of the proximal end part 121a of the other part 121R (the other end side of the other part 121R) are attached to the mounting bracket. It is fixed at 124. Thereby, the other end side of the one part 121L and the other end side of the other part 121R are fixed to the step plate 26 of the body 2.
In this way, since the other end side of the one part 121L and the other end side of the other part 121R are fixed to the body 2, the receiving member 121 is held at both ends (both ends are fixed). 121 can be improved. This can prevent the receiving member 121 from deforming due to the load applied when the bonnet 8 is opened and closed. In the work machine 1 of this embodiment, since the operating device 30 is mounted on the bonnet 8, the weight of the rotating part that rotates together with the bonnet 8 is increased, so when the bonnet 8 is opened and closed, the receiving member The load applied to 121 is large. Therefore, if the receiving member 121 is in a cantilevered state, deformation may occur due to the load applied when the bonnet 8 is opened and closed, but deformation can be prevented by having the receiving member 121 in a both-side supported state.

As shown in FIGS. 19 and 20, the locking member 122 has a base portion 122a and a claw portion 122b. The base portion 122a is located on the proximal end side of the locking member 122, is fixed to the outer peripheral surface of the cylindrical body 126, and extends in a direction away from the support shaft 125. The cylindrical body 126 is externally fitted onto a support shaft 125 extending in the width direction of the machine body, and is rotatable around the support shaft 125. The claw portion 122b is located on the distal end side of the locking member 122 and is bent forward.

An operating section 127 is provided on the opposite side of the base 122a from the cylindrical body 126. The operating portion 127 is a member that is held by the operator when switching the locking mechanism 120 between a locked state (a state in which the bonnet 8 cannot be opened) and an unlocked state (a state in which the bonnet 8 can be opened). The operating portion 127 is a rod-shaped member, and one end side is connected to the base portion 122a, and the other end side extends in a direction away from the support shaft 125.

As shown in FIG. 20, both ends of the support shaft 125 are supported by supports 128. In other words, the support shaft 125 is supported on both sides. The support body 128 is fixed to the back surface (rear surface) of the front part of the bonnet 8. The support body 128 has one plate portion 128L that supports one end of the support shaft 125, the other plate portion 128R that supports the other end of the support shaft 125, a rear portion of the one plate portion 128L, and a rear portion of the other plate portion 128R. It has a rear plate part 128B that connects. The one plate portion 128L and the other plate portion 128R are arranged parallel to each other with an interval in the machine body width direction.

A front plate 129 is attached between the front part of one plate part 128L and the front part of the other plate part 128R. A long hole 129a extending in the vertical direction is formed in the front plate 129. The other end side of the operating section 127 is inserted into this elongated hole 129a. The other end of the operating portion 127 is swingable about the support shaft 125 along the elongated hole 129a.
The cylindrical body 126, the support shaft 125, and the operating section 127 constitute an operating mechanism 123. The operating mechanism 123 moves the locking member 122 between a locking position where the locking member 122 is locked to the receiving member 121 (solid line position in FIG. 19) and a release position where the locking member 122 is released from the receiving member 121 (the imaginary line position in FIG. 19). position). The operating mechanism 123 can be operated by grasping the operating section 127. When the locking member 122 is in the locking position (see the solid line in FIG. 19) and the operating portion 127 is grasped and pulled upward, the locking member 122 rotates upward around the support shaft 125 together with the cylindrical body 126. , the claw portion 122b comes off from the connecting portion 121M of the receiving member 121 (see the imaginary line in FIG. 19). As a result, the bonnet 8 becomes unlocked. When the locking member 122 is in the release position (see the imaginary line in FIG. 19) and the operating portion 127 is grasped and pushed down, the locking member 122 rotates downward together with the cylindrical body 126 around the support shaft 125. , the claw portion 122b is locked to the connecting portion 121M of the receiving member 121 (see solid line in FIG. 19). As a result, the bonnet 8 becomes locked and unlocked.

As shown in FIGS. 11 and 19, a handle 8b is provided at the front of the bonnet 8, and the operator can open and close the bonnet 8 by grasping the handle 8b.
<Seat bracket, operation bracket, seat belt support>
As shown in FIG. 1, the work machine 1 includes a seat bracket 130 that supports the driver's seat 5 on the machine body 2 (specifically, on the hood 8). The seat bracket 130 is arranged above the hood 8 and below the driver's seat 5.

As shown in FIGS. 1, 6, 22, and 23, the seat bracket 130 includes a lower plate 130a placed on the bonnet 8, and a slide rail 132L for allowing the driver's seat 5 to slide in the front and back direction. , 132R. The lower plate 130a is fixed to the upper surface of the bonnet 8 with bolts 131 and the like. The slide rails 132L, 132R are fixed to the upper surface of the lower plate 130a.

The slide rail 132L and the slide rail 132R are arranged at intervals in the machine body width direction and extend parallel to each other in the front-rear direction. As shown in FIGS. 22 and 23, a support plate 133 that supports the lower part of the driver's seat 5 is arranged above the lower plate 130a. As shown in FIGS. 1 and 22, rail members 134L and 134R are fixed to the lower surface of the support plate 133. The rail material 134L and the rail material 134R are arranged at intervals in the machine body width direction and extend parallel to each other in the front-rear direction. The rail material 134L is placed on the slide rail 132L and is slidable in the front-rear direction along the slide rail 132L. The rail material 134R is placed on the slide rail 132R and is slidable in the front-rear direction along the slide rail 132R. When the rail members 134L and 134R fixed to the support plate 133 slide in the front-rear direction along the slide rails 132L and 132R, the driver's seat 5 supported on the support plate 133 moves in the front-rear direction.

As shown in FIGS. 1, 6, 22, 23, etc., the work machine 1 includes a seat belt device 150. The seatbelt device 150 includes a seatbelt 154 worn by a worker seated in the driver's seat 5, an accommodating portion 152 that accommodates the seatbelt 154, and an engaging portion 153 (with which a distal end portion 154a of the seatbelt 154 is engaged). (omitted in FIG. 6).
A seat belt 154 is housed in the housing portion 152 so as to be retractable. The seat belt 154 has a distal end portion 154a protruding from the accommodating portion 152, and a base end portion thereof is accommodated inside the accommodating portion 152. A distal end portion 154 a of the seat belt 154 pulled out from the accommodating portion 152 is engaged with the engaging portion 153 .

The seat belt device 150 is supported on the aircraft body 2 by a seat belt support 151. The seat belt support 151 includes a first support 151L and a second support 151R. The first support body 151L is arranged on the left side of the driver's seat 5. The second support body 151R is arranged on the right side of the driver's seat 5.
The first support body 151L has a first side plate 151La and a first support tube 151Lb. The first side plate 151La stands up from one side edge (left edge) of the lower plate 130a and extends upward. The first support tube 151Lb is connected to the surface (left surface) of the first side plate 151La on the outside of the body (left side), and protrudes from the surface to the outside (left side) of the body. The first support cylinder 151Lb is formed in a cylindrical shape. A housing portion 152 is attached to the first support tube 151Lb. The accommodating portion 152 is rotatably attached to the first support tube 151Lb around an axis in the width direction of the body.

The second support body 151R has a second side plate 151Ra and a second support tube 151Rb. The second side plate 151Ra stands up from the other side edge (right edge) of the lower plate 130a and extends upward. The second support tube 151Rb is connected to the surface (right surface) of the second side plate 151Ra on the outside of the body (right side), and protrudes from the surface to the outside (right side) of the body. The second support cylinder 151Rb is formed in a cylindrical shape. An engaging portion 153 is attached to the second support tube 151Rb. The engaging portion 153 is rotatably attached to the second support cylinder 151Rb around an axis in the width direction of the body.

The operator seated in the driver's seat 5 can put on the seat belt by pulling out the seat belt stored in the accommodating part 152 and engaging the distal end of the seat belt with the engaging part 153.
The first side plate 151La and the second side plate 151Ra of the seat belt support 151 are integrated with the lower plate 130a of the seat bracket 130. Specifically, the first side plate 151La is configured by bending one plate, and the lower plate 130a, the first side plate 151La, and the second side plate 151Ra. Thereby, the seat belt support 151 and the seat bracket 130 are integrated.

A reinforcing member 130b is fixed to the upper surface of the lower plate 130a. The reinforcing material 130b connects the first side plate 151La and the second side plate 151Ra. Therefore, the lower plate 130a of the seat bracket 130 and the first side plate 151La and second side plate 151Ra of the seat belt support 151 are integrated via the reinforcing material 130b. Thereby, the rigidity of the seat bracket 130 and the seat belt support 151 can be improved.

Further, as shown in FIGS. 1, 6, and 22, the first side plate 151La of the seat belt support 151 and the lower plate 130a of the seat bracket 130 are connected by a first reinforcing plate 135L. The second side plate 151Ra of the seat belt support 151 and the lower plate 130a of the seat bracket 130 are connected by a second reinforcing plate 135R. The first reinforcing plate 135L and the second reinforcing plate 135R reinforce the first side plate 151La and the second side plate 151Ra from inside the fuselage and connect them to the lower plate 130a. Rigidity can be improved.

As shown in FIGS. 1, 22, and 23, the operation bracket 140 includes a first operation bracket 140L that supports the first operation device 30L, and a second operation bracket 140R that supports the second operation device 30R. .
As shown in FIGS. 6, 23, etc., the first operation bracket 140L includes a first vertical plate 140La, a first horizontal plate 140Lb, and a first connection plate 140Lc. The first vertical plate 140La faces the first side plate 151La of the seat belt support 151. The first horizontal plate 140Lb connects the lower part of the first vertical plate 140La and the first horizontal plate 140Lb. The first vertical plate 140La and the first horizontal plate 140Lb are formed by bending one plate into an L-shape. The first connection plate 140Lc connects the first side plate 151La, the first vertical plate 140La, and the first horizontal plate 140Lb. The first connection plate 140Lc includes a first front connection plate 140Lc1 and a first rear connection plate 140Lc2. The first front connection plate 140Lc1 and the first rear connection plate 140Lc2 are arranged parallel to each other with an interval in the front-rear direction.

As shown in FIGS. 22, 23, etc., the second operation bracket 140R includes a second vertical plate 140Ra, a second horizontal plate 140Rb, and a second connection plate 140Rc. The second vertical plate 140Ra faces the second side plate 151Ra of the seat belt support 151. The second horizontal plate 140Rb connects the lower part of the second vertical plate 140Ra and the second horizontal plate 140Rb. The second vertical plate 140Ra and the second horizontal plate 140Rb are formed by bending one plate into an L-shape. The second connection plate 140Rc connects the second side plate 151Ra, the second vertical plate 140Ra, and the second horizontal plate 140Rb. The second connection plate 140Rc includes a second front connection plate 140Rc1 and a second rear connection plate 140Rc2. The second front connection plate 140Rc1 and the second rear connection plate 140Rc2 are arranged parallel to each other with an interval in the front-rear direction.

As described above, the first connection plate 140Lc (the first front connection plate 140Lc1 and the first rear connection plate 140Lc2) connects the first side plate 151La, the first vertical plate 140La, and the first horizontal plate 140Lb, and makes the second connection. The plate 140Rc (the second front connection plate 140Rc1 and the second rear connection plate 140Rc2) connects the second side plate 151Ra, the second vertical plate 140Ra, and the second horizontal plate 140Rb.
As a result, the operation bracket 140 has a structure that is firmly integrated with the seat bracket 130, so that the rigidity of the operation bracket 140 can be improved. Furthermore, since the first side plate 151La and second side plate 151Ra of the seat belt support 151 are reinforced from the outside of the aircraft body by the first connection plate 140Lc and the second connection plate 140Rc, respectively, the rigidity of the seat belt support 151 is also increased. improves.

Further, the first reinforcing plate 135L is arranged at a position overlapping the slide rail 132L and the first connecting plate 140Lc (first rear connecting plate 140Lc2) in the front-rear direction. The second reinforcing plate 135R is arranged at a position overlapping the slide rail 132R and the second connecting plate 140Rc (second rear connecting plate 140Rc2) in the front-rear direction. This makes it possible to enhance the reinforcing effect of the first reinforcing plate 135L and the second reinforcing plate 135R, and the reinforcing effect of the first connecting plate 140Lc and the second connecting plate 140Rc.

The first operation bracket 140L is connected to the left part of the seat belt support 151 (first support 151L) by connecting the first horizontal plate 140Lb and the first connection plate 140Lc to the first side plate 151La. . The second operation bracket 140R is connected to the right part of the seat belt support 151 (second support 151R) by connecting the second horizontal plate 140Rb and the second connection plate 140Rc to the second side plate 151Ra. . Thereby, the operation bracket 140 is integrated with the seat belt support 151.

As mentioned above, the seat belt support 151 is integrated with the seat bracket 130, and the operating bracket 140 is integrated with the seat belt support 151. That is, the seat belt support 151, the operation bracket 140, and the seat bracket 130 are integrated.
As a result, the operating bracket 140 is integrated with the seat belt support 151 and the seat bracket 130, and its rigidity is improved, so that when the operating levers (first operating lever 31L, second operating lever 31R) of the operating device 30 are operated. It can eliminate rattling.

Further, by integrating the seat belt support 151, the operation bracket 140, and the seat bracket 130, the number of parts can be reduced compared to the case where they are each made separately.
According to the work machine 1 of the above embodiment, the following effects are achieved.
The work machine 1 includes a machine body 2, a driver's seat 5 mounted on the machine body 2, an operating device 30 that is arranged on the side of the driver's seat 5 and rotates around a support shaft 33 extending in the width direction of the machine body, and an operating device 30, the operating device 30 is operated by the operating levers (first operating lever 31L, second operating lever 31R), and a plurality of hydraulic hoses (first operating lever 31L, 31R). 1 pilot hose 35L, 2nd pilot hose 35R) are connected to the control valves (1st pilot valve 32L, 2nd pilot valve 32R). The block 37 has a built-in valve body 36 that is operated by the valve body 36 and a plurality of oil passages 38 through which oil selectively flows through the valve body 36 of the block 37. A first port 37f provided on the upper surface 37a, which is a side surface, is bent to communicate with a second port 37g provided on the peripheral surface extending from the periphery of the upper surface 37a in a direction intersecting the upper surface 37a, The plurality of hydraulic hoses 35L, 35R are connected to the second port 37g and arranged to extend in a direction away from the peripheral surface.

According to this configuration, the hydraulic hoses (first pilot hose 35L, second pilot hose 35R) connected to the control valves 32L, 32R can be routed without abruptly bending them. Specifically, the plurality of hydraulic hoses 35L, 35R are connected to the second port 37g provided on the circumferential surface of the block 37 of the control valves 32L, 32R, and are arranged so as to extend away from the circumferential surface. There is no need to sharply bend the hydraulic hoses 35L, 35R below the control valves 32L, 32R from a downward direction to another direction (rearward, etc.). Therefore, it is possible to reduce the load applied to the hydraulic hose and improve the ease of assembling the hydraulic hose.

Further, the circumferential surface includes a rear surface 37d that faces the rear side of the aircraft body and is provided with a second port 37g, and the plurality of hydraulic hoses 35L, 35R are arranged to extend from the second port 37g to the rear side of the aircraft body. .
According to this configuration, there is no need to sharply bend the hydraulic hoses 35L, 35R from downward to rearward below the control valves 32L, 32R. Therefore, it is possible to reduce the load applied to the hydraulic hose and improve the ease of assembling the hydraulic hose.

Further, the block 37 is arranged on the extension line of the axis (swing center axis 31) La of the connection portion of the operating levers 31L and 31R with the valve body 36, and below the valve body 36.
According to this configuration, the block 37 can be arranged near the operating levers 31L, 31R, so that the control valves 32L, 32R including the block 37 can be configured compactly. Thereby, a wide space for curving the hydraulic hoses 35L, 35R can be secured, and it is possible to prevent the hydraulic hoses 35L, 35R from being arranged in a sudden bend.

Further, the operating levers 31L, 31R are arranged at the front of the operating device 30, the support shaft 33 is arranged at the rear of the operating device 30, and the hydraulic hoses 35L, 35R have a curved portion 59 that curves downward. However, the curved portion 59 is arranged above the support shaft 33.
According to this configuration, it is possible to secure a wide space for downwardly curving the hydraulic hoses 35L and 35R, so that the curved portion 59 can have a gentle degree of curvature.

Further, the curved portion 59 is arranged behind the block 37 and in front of the support shaft 33.
According to this configuration, the length of the hydraulic hoses 35L, 35R from the block 37 to the curved portion 59 can be shortened.
Further, the work equipment 1 includes a prime mover 10 and a bonnet 8 that covers the top of the prime mover 10, the driver's seat 5 and the operating device 30 are arranged above the bonnet 8, and the top of the bonnet 8 includes a hydraulic hose 35L, 35R is formed, and the opening 80 is provided behind the block 37 and in front of the support shaft 33.

According to this configuration, since the opening 80 of the bonnet 8 is located near the curved portion 59 of the hydraulic hoses 35L, 35R, the hydraulic hoses 35L, 35R can be moved approximately straight from the curved portion 59 to the opening 80 of the bonnet 8. Can be guided over short distances.
The operating device 30 also includes brackets (a first bracket 41L, a second bracket 41R) that are rotatably supported by a support shaft 33, and each of the brackets 41L and 41R has a front portion 41a that supports the block 37; It has a rear part 41b supported by a support shaft 33, and a connection part 41c that connects the front part 41a and the rear part 41b, and the hydraulic hoses 35L and 35R are connected from the front part 41a side along the connection part 41c. It extends toward the rear portion 41b.

According to this configuration, the hydraulic hoses 35L, 35R can be arranged along the brackets 41L, 41R, so it is possible to easily arrange the hydraulic hoses 35L, 35R to extend rearward.
Further, the working machine 1 covers a prime mover 10 mounted on the body 2 and an upper part of the prime mover 10, and is opened by rotating in a first direction about a horizontal axis 62 and by rotating in a second direction about a horizontal axis 62. and an auxiliary mechanism 110 that applies a spring force to assist the rotation of the bonnet 8 around the horizontal axis 62. A spring force is applied to assist the rotation, and when the bonnet 8 is closed, a spring force is applied to assist the rotation in the second direction.

According to this configuration, the spring force applied by the auxiliary mechanism 110 can assist the necessary force both when opening and closing the bonnet 8. Therefore, it is possible to easily open and close the bonnet 8 with little force.
Further, the horizontal axis 62 includes a first horizontal axis 62L disposed on one side in the width direction of the machine body, and a second horizontal axis 62R disposed on the other side in the width direction of the machine body, and the auxiliary mechanism 110 A first spring 111L, which is a torsion coil spring 111 that is wound around the first horizontal axis 62L and applies spring force; and a torsion coil spring that is wound around the second horizontal axis 62R and applies spring force. 111, a second spring 111R.

According to this configuration, the torsion coil spring 111 and the horizontal shaft 62 are arranged separately on one side and the other side in the width direction of the machine body, so that the opening/closing operation of the bonnet 8 can be performed on one side and the other side in the width direction of the machine body. It can help with a good balance. Further, since it is possible to reduce the space occupied by the auxiliary mechanism 110 within the bonnet 8, the space within the bonnet 8 can be used effectively.

Further, the auxiliary mechanism 110 assists the rotation in the first direction when the center of gravity of the rotating part that rotates together with the bonnet 8 is located forward of the rear end 2a of the fuselage 2, and assists the rotation in the second direction when it is behind the rear end of the
According to this configuration, the direction of the force assisted by the auxiliary mechanism 110 changes depending on the position of the center of gravity of the rotating part that rotates together with the bonnet 8, so that the opening and closing operations of the bonnet 8 can be performed smoothly.

Further, when the rotation angle around the horizontal axis 62 when the bonnet 8 rotates from the closed position to the open position is within the range from the closed position to the first angle, the auxiliary mechanism 110 rotates in the first direction. and assists rotation in the second direction when the angle is within the range from the second angle that is equal to or greater than the first angle to the open position.
According to this configuration, since the auxiliary mechanism 110 assists the rotation in the first direction at the initial stage of the operation of opening the bonnet 8 (range from the closed position to the first angle), the operation of opening the bonnet 8 can be easily performed. I can do it. Further, since the auxiliary mechanism 110 assists the rotation in the second direction at the beginning of the operation of closing the bonnet 8 (range from the open position to the second angle), the operation of closing the bonnet 8 can be easily performed.

Further, the auxiliary mechanism 110 does not assist the rotation of the bonnet 8 when the rotation angle is in the range between the first angle and the second angle.
According to this configuration, when the bonnet 8 is in an intermediate position between the open position and the closed position (in the range between the first angle and the second angle), a force that assists rotation is applied to the bonnet 8. Therefore, during the opening/closing operation of the bonnet 8, it is possible to suppress the force from acting in a direction opposite to the opening/closing operation of the bonnet 8, and it becomes possible to smoothly perform the opening/closing operation of the bonnet 8.

The auxiliary mechanism 110 also includes a first member 112 fixed to the fuselage 2, a second member 113 fixed to the bonnet 8 and rotatable around the horizontal axis 62 with respect to the first member 112, and a second member 113 having one end. a linking member 114 attached to the first member 112 by one shaft 115 and the other end attached to the second member 113 by a second shaft 116; the first member 112 is attached to one end of the torsion coil spring 111; The second member 113 has a first locking portion 112g to which the torsion coil spring 111 is locked, and a guide hole 112e that guides movement of the first shaft 115 as the bonnet 8 rotates. It has a second locking portion 113a to which the end portion is locked.

According to this configuration, the spring force of the torsion coil spring 111 can be smoothly and reliably transmitted to the bonnet 8 by the interlocking of the first member 112, the second member 113, and the linking member 114.
The second locking portion 113a is composed of a long hole extending in an arc shape around the horizontal axis 62, and the other end of the torsion coil spring 111 is connected to the long hole when the bonnet 8 is closed. It abuts on one end side, and when the bonnet 8 is open, it abuts on the other end side of the elongated hole.

According to this configuration, when the bonnet 8 is closed, the other end of the torsion coil spring 111 comes into contact with one end of the elongated hole that constitutes the second locking part 113a, so that the second member 113 A force in a first direction can be applied to the first direction. Furthermore, when the bonnet 8 is open, the other end of the torsion coil spring 111 comes into contact with the other end of the elongated hole that constitutes the second locking part 113a. Forces can be applied in two directions.

The work equipment 1 also includes a locking mechanism 120 that can be held against the machine body 2 with the bonnet 8 closed. A locking member 122 that can be locked to the receiving member 121, and a locking position where the locking member 122 is locked to the receiving member 121 and a release position where the locking to the receiving member 121 is released. The receiving member 121 has one part 121L disposed on one side in the width direction of the machine body, the other part 121R arranged on the other side in the width direction of the machine body, and one part 121R arranged on the other side in the width direction of the machine body. It has a connecting part 121M that connects one end side of the first part 121L and one end side of the other part 121R and to which the locking member 122 is locked, and the other end side of the one part 121L and the other end side of the other part 121R are Fixed to body 2.

According to this configuration, since the other end side of the one part 121L and the other end side of the other part 121R are fixed to the body 2, the receiving member 121 is in a dual-supported state (both ends are fixed). The strength of the receiving member 121 can be improved. This can prevent the receiving member 121 from deforming due to the load applied when the bonnet 8 is opened and closed.
The working machine 1 also includes a machine body 2, a hydraulic oil tank 9 mounted on the machine body 2, a working device 4 driven by the hydraulic oil stored in the hydraulic oil tank 9, a hydraulic hose 35L through which the hydraulic oil flows, 35R, the hydraulic oil tank 9 has a viewing window 90 that allows the oil in the hydraulic oil tank 9 to be viewed, and a viewing window 90 that is attached to the hydraulic hoses 35L and 35R that protrudes from the wall of the hydraulic fluid tank 9. It has a cylindrical part 91 having an outer surface 91a for guiding.

According to this configuration, the hydraulic hoses 35L, 35R can be guided by the cylindrical part 91 equipped with the viewing window 90 that allows the inside of the hydraulic oil tank 9 to be viewed, so that the hydraulic hoses 35L, 35R can be guided in the desired direction. The oil (oil level) stored in the hydraulic oil tank 9 can be clearly viewed from the outside without being obstructed by the hydraulic hoses 35L, 35R while properly guiding the oil (oil level) to the hydraulic oil tank 9. Furthermore, since the outer surface 91a of the cylindrical portion 91 plays the role of a hose guide for guiding the hydraulic hoses 35L and 35R, it is possible to reduce the number of hose guides and reduce the number of parts.

Further, the protruding length of the cylindrical portion 91 from the hydraulic oil tank 9 is set to be greater than or equal to the outer diameter of the hydraulic hoses 35L, 35R.
According to this configuration, the hydraulic hoses 35L, 35R can be reliably brought into contact with the cylindrical portion 91 and guided smoothly.
Further, the work machine 1 includes a driver's seat 5 mounted on the machine body 2 and an operating device 30 for operating the work device 4. The hydraulic hoses 35L, 35R include a first hydraulic hose 35L connected to the first operating device 30L, and a second operating device 30R provided on the other side of the driver's seat 5. The first hydraulic hose 35L and the second hydraulic hose 35R are arranged along the outer surface of the cylindrical portion 91 on opposite sides of the viewing window 90. being guided.

According to this configuration, the first hydraulic hose 35L and the second hydraulic hose 35R can be guided apart from each other to a position sandwiching the cylindrical part 91, so the first hydraulic hose 35L and the second hydraulic hose 35R can can prevent interference or entanglement.
Further, the cylindrical portion 91 has a cylindrical shape.
According to this configuration, the hydraulic hoses 35L, 35R can be extended along the curve of the outer surface (outer peripheral surface) 91a of the cylindrical portion 91, so that the hydraulic hoses 35L, 35R can be smoothly guided without damaging them. can.

Further, the cylindrical portion 91 has a cylindrical shape with an axis extending in a substantially horizontal direction, and the hydraulic hoses 35L and 35R extend in the vertical direction along the outer surface of the cylindrical portion 91.
According to this configuration, the hydraulic hoses 35L, 35R can be smoothly guided in the vertical direction along the outer surface of the cylindrical portion 91.
Further, a first guide member 101 that guides the hydraulic hoses 35L and 35R toward the cylindrical portion 91 is attached to the hydraulic oil tank 9.

According to this configuration, the hydraulic hoses 35L and 35R can be smoothly guided toward the cylindrical portion 91 by the first guide member 101. Furthermore, by attaching the first guide member 101 to the hydraulic oil tank 9, there is no need to prepare a separate member (such as a bracket) for attaching the first guide member 101, and the number of parts can be reduced.
Further, the first guide member 101 is constituted by a round bar attached along the corner edge of the hydraulic oil tank 9.

According to this configuration, while preventing the hydraulic hoses 35L, 35R from coming into contact with the corner edges of the hydraulic oil tank 9 and being damaged, the first guide member 101 allows the hydraulic hoses 35L, 35R to be directed toward the cylindrical portion 91. Can guide you smoothly.
The fuselage 2 also has a rotating base plate 6 that can rotate around an axis in the vertical direction, and the rotating base plate 6 has a second guide member 102 that guides the hydraulic hoses 35L and 35R extending along the cylindrical portion 91. installed.

According to this configuration, the hydraulic hoses 35L and 35R extending along the cylindrical portion 91 can be smoothly guided by the second guide member 102. Further, by attaching the second guide member 102 to the highly rigid rotating base plate 6, the rigidity of the second guide member 102 can be increased and deformation can be prevented.
The work equipment 1 also includes a valve unit 21 that controls the supply of hydraulic oil to the work equipment 4 and an operating device 30 that operates the working equipment 4. It has a pilot valve (first pilot valve 32L, second pilot valve 32R) that controls the supply of oil, and the hydraulic hoses 35L, 35R are pilot valves that connect the operating device 30 and the valve unit 21 to flow pilot oil. It's a hose.

According to this configuration, the oil stored in the hydraulic oil tank 9 can be clearly viewed from the outside without being obstructed by the pilot hoses 35L, 35R.
Furthermore, the viewing window 90 allows the hydraulic oil in the hydraulic oil tank 9 to be visually recognized through the internal space of the cylindrical portion 91 .
According to this configuration, in a state where the hydraulic hoses 35L, 35R are guided on the outer surface 91a of the cylindrical portion 91, the hydraulic oil can be visually recognized through the viewing window 90 without being obstructed by the hydraulic hoses 35L, 35R. .

The work equipment 1 also includes a machine body 2, a driver's seat 5 mounted on the machine body 2, an operating device 30 provided on the machine body 2 on the side of the driver's seat 5, and tasks operated by the operating device 30. The device 4, the seatbelt 154 worn by the worker seated in the driver's seat 5, the storage section 152 that accommodates the seatbelt 154, and the tip end 154a of the seatbelt 154 pulled out from the storage section 152 are engaged. A seatbelt device 150 having an engaging portion 153, an operation bracket 140 that supports the operating device 30 on the aircraft body 2, and a seatbelt support 151 that supports the seatbelt device 150 on the aircraft body 2. The bracket 140 and the seat belt support 151 are integrated.

According to this configuration, the operating bracket 140 that supports the operating device 30 on the aircraft body 2 and the seat belt support 151 that supports the seatbelt device 150 on the aircraft body 2 are integrated, so that the operating bracket 140 The rigidity is improved, and rattling during operation of the operating device 30 can be prevented.
Further, the work machine 1 includes a seat bracket 130 that supports the driver's seat 5 on the machine body 2, and the seat bracket 130, the operation bracket 140, and the seat belt support 151 are integrated.

According to this configuration, the seat belt support 151, the operation bracket 140, and the seat bracket 130 are integrated, so that the rigidity of the operation bracket 140 can be further improved, and the rigidity of the operation bracket 140 can be further improved. The number of parts can be reduced compared to the conventional case.
Further, the operating device 30 includes a first operating device 30L provided on one side of the driver's seat 5 and a second operating device 30R provided on the other side of the driver's seat 5. , a first operation bracket 140L that supports a first operation device 30L, and a second operation bracket 140R that supports a second operation device 30R. and slide rails 132L and 132R that are fixed to the upper surface of the lower plate 130a and allow the driver's seat 5 to slide in the front and rear directions, and the seat belt support 151 stands up from one side edge of the lower plate 130a. and a second side plate 151Ra that stands up from the other side edge of the lower plate 130a and is connected to the second operation bracket 140R. According to the configuration, by making the first side plate 151La and the second side plate 151Ra of the seat belt support 151 stand up from the lower plate 130a of the seat bracket 130, the seat belt support 151 and the seat bracket 130 are integrated. It can be configured compactly. Also, by connecting the first operation bracket 140L to the first side plate 151La and connecting the second operation bracket 140R to the second side plate 151Ra, the first operation bracket 140L and the second operation bracket 140R can be connected to the seat belt support 151 and The integrated seat bracket 130 can be configured compactly.

Further, the seat belt support 151 includes a first support 151L to which the accommodating portion 152 is attached and has a first side plate 151La, and a second support 151R to which the engagement portion 153 is attached and has a second side plate 151Ra. including.
According to this configuration, the first support body 151L to which the accommodating portion 152 is attached and the second support body 151R to which the accommodating portion 152 is attached are integrated with the seat belt support body 151, so the first support body 151L , the rigidity of the second support body 151R and the seat belt support body 151 can be improved.

Further, the working machine 1 includes a reinforcing member 130b that is fixed to the upper surface of the lower plate 130a and connects the first side plate 151La and the second side plate 151Ra.
According to this configuration, the lower plate 130a of the seat bracket 130 and the first side plate 151La and the second side plate 151Ra of the seat belt support 151 are integrated via the reinforcing material 130b, so that the seat bracket 130 and the seat belt The rigidity of the support body 151 can be improved.

The first operation bracket 140L also includes a first vertical plate 140La facing the first side plate 151La, a first horizontal plate 140Lb connecting the lower part of the first vertical plate 140La and the first side plate 151La, and a first side plate 151La. and a first connection plate 140Lc that connects the first vertical plate 140La and the first horizontal plate 140Lb, and the second operation bracket 140R has a second vertical plate 140Ra facing the second side plate 151Ra, and a second It has a second horizontal plate 140Rb that connects the lower part of the vertical plate 140Ra and the second side plate 151Ra, and a second connection plate 140Rc that connects the second side plate 151Ra, the second vertical plate 140Ra, and the second horizontal plate 140Rb. are doing.

According to this configuration, the rigidity of the operation bracket 140 (first operation bracket 140L, second operation bracket 140R) can be improved by the first connection plate 140Lc and the second connection plate 140Rc.
Further, the work machine 1 includes a first reinforcing plate 135L that connects the first side plate 151La and the lower plate 130a, and a second reinforcing plate 135R that connects the second side plate 151Ra and the lower plate 130a. The first reinforcing plate 135L is arranged at a position overlapping the slide rails 132L, 132R and the first connecting plate 140Lc in the front-rear direction, and the second reinforcing plate 135R is arranged in a position overlapping the slide rails 132L, 132R and the second connecting plate 140Rc in the front-rear direction. It is placed in a position that overlaps with the

According to this configuration, the reinforcing effects of the slide rail 132L, the first connecting plate 140Lc, the slide rail 132R, and the second connecting plate 140Rc are combined with the reinforcing effects of the first reinforcing plate 135L and the second reinforcing plate 135R, so that the seat bracket 130, the effect of improving the rigidity of the seat belt support 151 and the operation bracket 140 can be enhanced.
Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 Work equipment 2 Body 2a Rear end 8 of the body 8 Bonnet 10 Prime mover 62 Horizontal shaft 62L First horizontal shaft 62R Second horizontal shaft 110 Auxiliary mechanism 111 Torsion coil spring 111L First spring 111R Second spring 112 First member 112e Guide hole 112g First locking part 113 Second member 113a Second locking part 114 Cooperation member 115 First shaft 116 Second shaft 120 Lock mechanism 121 Receiving member 121L One part 121R Other part 121M Connecting part 122 Locking member 123 Operating mechanism

Claims (7)

A prime mover mounted on the aircraft,
a bonnet that covers above the prime mover, opens by rotating in a first direction about the horizontal axis, and closes by rotating in a second direction about the horizontal axis;
a driver's seat supported on the hood and rotating around the horizontal axis together with the hood;
an auxiliary mechanism that applies a spring force that assists rotation of a rotating portion including the bonnet and the driver's seat about the horizontal axis;
Equipped with
The auxiliary mechanism assists the rotation in the first direction when the center of gravity of the rotating part is located forward of the rear end of the aircraft body, and the assisting mechanism assists the rotation in the first direction when the center of gravity of the rotating part is located behind the rear end of the aircraft body. A work machine that assists rotation in the second direction when the work machine is in the second direction . The horizontal axis includes a first horizontal axis located on one side in the width direction of the aircraft body and a second horizontal axis located on the other side in the width direction of the aircraft body,
The auxiliary mechanism includes a first spring made of a torsion coil spring that is wound around the first horizontal axis to apply the spring force, and a first spring that is wound around the second horizontal axis to apply the spring force. The working machine according to claim 1, further comprising a second spring made of a torsion coil spring for urging. a counterweight provided at the rear end of the aircraft;
The prime mover is mounted in a prime mover chamber whose upper part is covered by the bonnet and whose rear part is covered by the counterweight,
The auxiliary mechanism has a torsion coil spring that is wound around the horizontal axis to apply the spring force, and is attached to the inner surface of the body of the counterweight and near the upper end thereof,
2. The center of gravity of the rotating part is located behind the auxiliary mechanism when the bonnet is open, and the center of gravity of the rotating part is located in front of the auxiliary mechanism when the bonnet is closed. Work equipment described in. The auxiliary mechanism is
a first member fixed to the inner surface of the counterweight and near the upper end;
a second member fixed to the bonnet and rotatable about the horizontal axis with respect to the first member;
The second member has one end fixed to the rear lower surface of the bonnet, the other end pivoted about the horizontal axis with respect to the first member, and the one end and the other end. a connecting midway part, the midway part extending downward from the one end when the bonnet is closed, and then bending backward;
4. The work machine according to claim 3, wherein the one end is located behind the horizontal shaft when the bonnet is open, and the one end is located forward of the horizontal shaft when the bonnet is closed. The auxiliary mechanism is
a first member fixed to the aircraft body;
a second member fixed to the bonnet and rotatable about the horizontal axis with respect to the first member;
a cooperation member having one end attached to the first member by a first shaft and the other end attached to the second member by a second shaft;
has
The first member has a first locking portion to which one end of the torsion coil spring is locked, and a guide hole that guides movement of the first shaft as the bonnet rotates;
The second member has a second locking portion to which the other end of the torsion coil spring is locked ,
The guide hole has a curved portion that is curved so as to be convex forward, and a bent portion that is shorter than the curved portion that is bent diagonally backward at an acute angle from the upper end of the curved portion,
5. The first shaft according to claim 1, wherein the first shaft is disposed at the lower end of the curved portion when the bonnet is closed, and is disposed at the bent portion when the bonnet is opened. work equipment. The second locking portion is composed of a long hole extending in an arc shape with the horizontal axis as the center,
The other end of the torsion coil spring abuts one end of the elongated hole when the bonnet is closed, and abuts the other end of the elongated hole when the bonnet is open. 5. The work machine described in 5. comprising a locking mechanism capable of holding the hood with respect to the aircraft body in a closed state;
The locking mechanism is
a receiving member provided on the aircraft body;
a locking member provided on the bonnet and lockable to the receiving member;
an operating mechanism that moves the locking member between a locking position where the locking member is locked to the receiving member and a release position where the locking member is released from the receiving member;
has
The receiving member has one part disposed on one side in the width direction of the machine body, the other part arranged on the other side in the width direction of the machine body, one end side of the one part and one end side of the other part. a connecting part that connects and in which the locking member is locked;
The other end side of the one part and the other end side of the other part are fixed to a step plate of the machine body on which a worker seated in a driver's seat rests his or her feet. work equipment.

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