JP7301808B2 - work machine - Google Patents

Description

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

BACKGROUND ART Conventionally, a working machine disclosed in Patent Document 1 is known.
The work machine disclosed in Patent Document 1 includes an airframe, an oil tank mounted on the airframe, and an oil gauge device that displays the level of hydraulic oil stored in the oil tank. . A side cover body that covers the side of the machine body is provided with a liquid level inspection window for checking the liquid level of the hydraulic oil.

Japanese Patent Application Laid-Open No. 2015-232208

However, in the disclosed technology, when the hydraulic hose is routed to pass near the oil tank, there is a risk that the hydraulic hose will hinder the inspection of the hydraulic fluid level through the fluid level inspection window.
The present invention has been made in view of the above-mentioned problems, and the oil stored in the oil tank (oil level) can be properly guided from the outside without being obstructed by the hydraulic hose while properly guiding the hydraulic hose in the required direction. To provide a work machine that can be visually recognized.

A work machine according to an aspect of the present invention includes a body, an oil tank mounted on the body, a work device driven by hydraulic oil stored in the oil tank, a hydraulic hose for circulating the hydraulic oil, The oil tank has a viewing window that allows the oil in the oil tank to be viewed, and a tubular portion that has the viewing window attached and an outer surface that protrudes from the wall surface of the oil tank and guides the hydraulic hose. and have

According to the work machine of the present invention, the hydraulic hose can be guided by the cylindrical portion having the viewing window that allows the inside of the oil tank to be visually recognized. , the oil (oil level) stored in the oil tank can be well visually recognized from the outside without being obstructed by the hydraulic hose.

It is a front view of a driver's seat, an operating device, and the like. It is a side view which shows the internal structure of an operating device. It is a rear perspective view showing the internal structure of the operating device. It is a front perspective view showing a bonnet, a first operating device, and the like. FIG. 4 is a side view showing the arrangement of hydraulic hoses, etc. FIG. It is a front perspective view showing a seat bracket, a seat belt support, an operating bracket, a first operating device, and the like. FIG. 4 is a rear perspective view showing arrangement of hydraulic hoses, etc. FIG. Fig. 3 is a front perspective view showing a hydraulic oil tank, hydraulic hoses, etc.; It is a rear perspective view showing a hydraulic oil tank, a hydraulic hose, and the like. FIG. 3 is a rear perspective view of the airframe and the like; FIG. 4 is a side view of the bonnet in the closed position; FIG. 4 is a side view showing the closed and open positions of the bonnet; It is a rear perspective view of an auxiliary mechanism. It is a front perspective view of an auxiliary mechanism. It is a rear view of an auxiliary mechanism. FIG. 11 is a side view of the auxiliary mechanism when the bonnet is in the closed position; FIG. 4 is a side view of the auxiliary mechanism when the bonnet is in the open position; FIG. 4 is a side view of the auxiliary mechanism when the bonnet is in an intermediate position between the open position and the closed position; It is a side view of a locking mechanism. Fig. 3 is a front perspective view of the locking mechanism; FIG. 4 is a perspective view showing a receiving member, a step plate, a mounting bracket, and the like; FIG. 4 is a front perspective view showing a seat bracket, a seat belt support, an operating bracket, and the like; FIG. 4 is a rear perspective view showing a seat bracket, a seat belt support, an operating bracket, and the like; It is a figure which shows the state which flipped up the operating device of the working machine. It is a side view showing one embodiment of a working machine.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a working machine according to the present invention will be described below based on the drawings.
FIG. 25 is a side view showing one embodiment of the working machine 1 according to the present invention. A work machine 1 according to the present embodiment is a backhoe that is a turning work machine.
The working machine 1 includes a body 2 , a traveling device 3 and a working device 4 . A driver's seat 5 is provided on the body 2 . Hereinafter, the front side of the worker sitting in the driver's seat 5 (left side in FIG. 25) is forward, the rear side of the worker (right side in FIG. 25) is backward, the left side of the worker (front side in FIG. 25) is left, The right side of the operator (back side in FIG. 25) will be described as the right side. Also, the horizontal direction, which is a direction orthogonal to the longitudinal direction, will be described as the body width direction. Also, the direction from the central portion of the airframe 2 to the right or left will be described as the outer side of the airframe. In other words, the outer side of the fuselage is the width direction of the fuselage and the direction away from the fuselage 2 . The direction opposite to the outer side of the fuselage will be described as the inner side of the fuselage. In other words, the inner side of the body is the width direction of the body and the direction toward the body 2 .

The body 2 is supported on the frame of the travel device 3 via a bearing so that it can freely turn about a vertical axis (an axis in the vertical direction). The fuselage 2 has a turning base plate 6 and a weight 7 . The turning base plate 6 is turned by driving a turning motor (not shown) consisting of a hydraulic motor. A step plate 26 is arranged above the swivel base plate 6 for the operator sitting on the driver's seat 5 to put his/her feet on. A side cover 27 covers a space between the turning base plate 6 and the step plate 26 .

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

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

A base end portion of the boom 12 is pivotally supported by a swing bracket 18 provided at the front portion of the machine body 2 so as to be capable of swinging about a horizontal axis. The swing bracket 18 is pivotally supported on a support bracket 29 provided on the body 2 so as to be capable of swinging about a vertical axis. A swing cylinder (not shown) consisting of a hydraulic cylinder is attached to the machine body 2, and the swing bracket 18 is swung by driving the swing cylinder. A base end portion of an arm 13 is pivotally supported at a tip end portion 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 the middle portion of the boom 12 . The boom 12 swings up and down by extension and contraction of the boom cylinder 15 . The arm cylinder 16 connects the middle 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 implement cylinder 17 connects the base end portion of the arm 13 and the mounting portion of the work implement 14 . The work implement 14 performs scooping and dumping operations as the work implement cylinder 17 expands and contracts.

Rops 24 are provided on the body 2 to protect the operator sitting on the driver's seat 5. - 特許庁A control tower 20 is provided in front of the step plate 26 and in front of the driver's seat 5 and the bonnet 8 . A travel lever 22 is provided on the control tower 20 . 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 arranging and integrating a plurality of control valves for controlling the hydraulic actuators of the working device 4 in parallel in the width direction of the machine body. The control valves that constitute the valve unit 21 include, for example, a swing valve for the swing motor, an arm valve for the arm cylinder 16, a boom valve for the boom cylinder 15, a work implement valve for the work implement cylinder 17, right and left travel valves. It consists of a travel valve for the motor 28, a speed change valve for the speed change of the travel motor 28, a dozer valve for the dozer cylinder, a swing valve for the swing cylinder, and the like.

Among control valves, travel valves, dozer valves, variable speed valves, and swing valves are mechanical control valves to which operating forces are transmitted via links or the like. The travel lever 22 and the dozer lever 60 are mechanically connected to the 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 with the dozer valve. The swing valve is mechanically connected to a swing pedal arranged on the right side of the control tower 20 . The shift valve is mechanically connected to a shift pedal arranged on the left side of the control tower 20 .

The swing valve, arm valve, boom valve, and work implement 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 pilot valves (remote control valves) via hydraulic hoses (pilot hoses). 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 operation device 30 is arranged on the side of the driver's seat 5 and above the bonnet 8. As shown in FIGS. As shown in FIG. 24 , the operating device 30 is configured such that the front portion can be flipped up 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 portion of the operating device 30 . The operating device 30 is changeable between a first position in which the front portion is not flipped up (see FIG. 25) and a second position in which the front portion is flipped up (see FIG. 24). Hereinafter, the positional relationship of each component will be described with reference to when the operation device 30 is in the first position, unless otherwise specified.

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 most of the configurations of the first operating device 30L and the second operating device 30R are common, the configuration of the first operating device 30L will be described first, and then the second operating device 30R will differ from the first operating device 30L. Explain the point.
As shown in FIGS. 1 and 2, the first operating device 30L has 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 in front of the first operating device 30L. The first operating lever 31L is attached to the upper portion of the first casing 34L and is swingable forward, backward, leftward, and rightward. The first pilot valve 32L is housed inside the first casing 34L. A wrist rest 55 is attached to the upper portion 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 make up the valve unit 21 . A plurality of hydraulic hoses (first pilot hoses) 35L are connected to the first pilot valve 32L. In 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 distributes pilot oil for operating the control valves that constitute the valve unit 21. As shown in FIG.

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

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

The block 37 is located inside the first casing 34L on the extension of the swing center axis 31La of the operation levers 31L and 31R (in the axial direction of the shafts forming the operation levers 31L and 31R at the connection with the valve element 36), And it is arranged below the valve body 36 . The plurality of oil passages 38 are bent in an L-shape so as to communicate between 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 this embodiment, the second port 37g is provided on the rear surface 37d of the block 37. As shown in FIG. The number of first ports 37 f and second ports 37 g corresponds to the number of first pilot hoses 35 . In 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 control lever 31L, the port and the oil passage 38 through which the oil flows are selected (switched).

A first port 37 f 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. As shown in FIG. 3, the pipe joint 39 is a straight pipe joint extending linearly rearward from the second port 37g. The multiple (six) first pilot hoses 35L are connected to multiple (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 to extend in a direction (rearward) away from the peripheral surface (rear surface 37d) of the block 37 from each second port 37g. ing. That is, 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 arranged to extend in a direction (rearward) away from the peripheral surface (rear surface 37d). there is

A 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 a form in which a plurality of first pilot hoses 35L are bundled with a binding band or the like, or in a form in which a plurality of first pilot hoses 35L are inserted into one thick tube. may
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 boom valves and two are connected to work implement valves. The remaining two are connected via the valve unit 21 (or directly) to the pilot pump and the drain, respectively.

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

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 41 a is a portion located in the front portion of the first bracket 41</b>L and supports the block 37 . The rear portion 41b is a portion located at the rear portion of the first bracket 41L and is supported by the support shaft 33. As shown in FIG. The connecting portion 41c connects the front portion 41a and the rear portion 41b.

As shown in FIGS. 3 and 4, the first bracket 41L has a pair of side plates 42 spaced apart in the machine body width direction. Front portions of the pair of side plates 42 are included in the front portion 41a. Rear portions of the pair of side plates 42 are included in the rear portion 41b. An intermediate portion in the front-rear direction of the pair of side plates 42 is included in the connecting portion 41c. The pair of side plates 42 includes an inner side plate 42A arranged on the inner side of the fuselage (on the side of the driver's seat 5) and an outer side plate 42B arranged on the outer side of the fuselage (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 across 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). The first operating device 30L can be changed from the first position to the second position by pulling up the first lock lever 43L, and the first operating device 30L can be changed from the second position to the first position by pushing down the first lock lever 43L. position can be changed.

A base end portion of the first lock lever 43L is connected to a cam plate 44 having a cam groove hole 44a. The upper end of the cam plate 44 is pivotally supported by the rocking plate 46 via the first pivot shaft 45 . The rocking plate 46 is pivoted on the first bracket 41L via the second pivot shaft 47. As shown in FIG. A pin 48 is inserted through the cam groove hole 44a.
The pin 48 extends outward from the fuselage from a fixed plate 49 (see FIGS. 4 and 6) fixed to the operation bracket 140 . The fixed plate 49 has an upper portion connected to the operation bracket 140 by a connecting shaft 50 and a lower portion connected to the operation bracket 140 by welding or the like. The operation bracket 140 is provided with an attachment shaft 51 to which one end of an urging member (not shown) such as a gas cylinder is attached. The other end of the biasing member is connected to the lower portion of the front bracket 52 attached to the front portion 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 in the cam groove hole 44a as the first lock lever 43L moves up and down. As shown in FIG. 2, when the first lock lever 43L is at the lowered position (when the first operating device 30L is at the first position), the pin 48 is positioned at the upper portion 44a1 of the cam groove hole 44a. When the first lock lever 43L is at the raised position (when the first operating device 30L is at the second position), the pin 48 is positioned at the lower portion 44b2 of the cam groove hole 44a. In the present 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 control lever 31L or the wrist rest 55) is operated. Also, the pin 48 cannot be removed from the lower portion 44b2 of the cam groove hole 44a, and the first operating device 30L is held at the second position. That is, unless the first lock lever 43L is operated, the first operating device 30L cannot be moved from the second position to the first position.

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 contacts a detection plate 54 fixed to the body 2 side (bonnet 8) when the first operating device 30L is at the second position. Thereby, it is detected that the first operating device 30L is at 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. Accordingly, when the first lock lever 43L is at the lowered position (when the first operating device 30L is at the first position), the work device 4 can be driven, and when the first lock lever 43L is at the raised position ( When the first operating device 30L is at the second position), the work device 4 cannot be driven.

As shown in FIG. 4, the first pilot hose 35L extends from the front portion 41a side to the rear portion 41b side along the lower portion of the connection portion 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 forward of the support shaft 33 . Also, the curved portion 59 passes between the support shaft 33 and the pin 48 . Also, the curved portion 59 passes between the pin 48 and the first pivot shaft 45 . The first pilot hose 35L is bent downward at the curved portion 59 and then inserted into the bonnet 8 through an opening 80 formed in the bonnet 8 .

An opening 80 of the bonnet 8 is provided rearward of the block 37 and forward of the support shaft 33 . Thereby, the first pilot hose 35L is inserted into the bonnet 8 from the opening 80 forward 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 described.
Regarding the second operating device 30R, the points different from the first operating device 30L will be mainly described, and the description of the common configuration will be omitted.
The first operating device 30L and the second operating device 30R differ only in that they are bilaterally symmetrical and that they operate on different objects. Other configurations are common.

Regarding the difference between the former, the first operating device 30L and the second operating device 30R are configured symmetrically with respect to the center line CL1 (see FIG. 1) in the machine width direction. Regarding the latter difference, the second operating device 30R is a device for operating the boom/bucket as described above, and therefore two of the six second pilot hoses 35R of the second operating device 30R are used for turning valves. , and two are connected to the arm valve.

Except for these differences, the configuration of the second operating device 30R is the same as that 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 "L" to "R" in the configuration of the first operation device 30L described above, the configuration of the second operation device 30R is obtained. 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. 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 differences described above.

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 the control valves forming the valve unit 21 . The second pilot hose 35R is bundled into one second hose bundle 40R inside the second casing 34R. As shown in FIG. 7, a second hose bundle 40 consisting of a plurality of second pilot hoses 35R is inserted inside the bonnet 8. As shown in FIG.
<Arrangement of pilot hose>
The openings 80 of the bonnet 8 include a first opening 80L (see FIG. 4) formed on the upper left surface of the bonnet 8, a second opening 80R (see FIG. 6) formed on the upper left surface of the bonnet 8, including. 4 and 6, the second operating device 30R is omitted. 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 inside the bonnet 8 extends rearward along the lower surface of the upper plate 8a of the bonnet 8 and then bends downward at the rear portion of the bonnet 8. extending 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 while being divided into left and right portions. The first pilot hose 35</b>L and the second pilot hose 35</b>R extend separately to the left and right sides of a horizontal shaft 62 that serves as a rotation shaft of the bonnet 8 . More specifically, the first pilot hose 35L passes through the left side of a first horizontal axis 62L, which will be described later. The second pilot hose 35R passes rightward of a second horizontal shaft 62R, which will be described later.

As shown in FIGS. 5 and 7 , the first pilot hose 35L extends downward through the left side of the hydraulic oil tank 9 . The second pilot hose 35</b>R passes through the rear of the hydraulic oil tank 9 , moves from the right side of the hydraulic oil tank 9 to the left side, and then passes through the left side of the hydraulic oil tank 9 and extends downward. 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 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. As shown in FIGS. 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 can be visually recognized from the outside of the fuselage 2 through an opening 7 a formed in the left portion of the weight 7 .

The viewing window 90 is attached to the tubular portion 91 . The viewing window 90 is fitted inside the tubular portion 91 at the distal end portion of the tubular portion 91 so that the hydraulic oil in the hydraulic oil tank 9 can be visually recognized through the internal space of the tubular portion 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 be elliptical or rectangular. In the case of this embodiment, the cylindrical portion 91 has a cylindrical shape with an axis extending substantially horizontally, and protrudes leftward from the left wall surface of the hydraulic oil tank 9 .

The projecting length of the cylindrical portion 91 (the projecting length from the wall surface of the hydraulic oil tank 9) is preferably set to be equal to or greater than the outer diameter of the hydraulic hoses (first pilot hose 35L, second pilot hose 35R). In this case, the projecting length of the tubular portion 91 may be set to be equal to or larger than the outer diameter of at least one hydraulic hose (the first pilot hose 35L, the second pilot hose 35R). is set to be equal to or larger than the outer diameter of the first hose bundle 40L that is bundled into one, and to be larger than the outer diameter of the second hose bundle 40R that is bundled of the plurality of second pilot hoses 35R. Moreover, the outer diameter of the cylindrical portion 91 is preferably equal to or greater than the outer diameter of the first hose bundle 40L and equal to or 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 (the first pilot hose 35L and the second pilot hose 35R). The tubular portion 91 protrudes from the wall surface (left wall surface) of the hydraulic oil tank 9, so that the hydraulic hoses (the first pilot hose 35L and the second pilot hose 35R) can be brought into contact with the outer surface 91a and guided. 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. Sometimes.

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 tubular portion 91 on opposite sides of the viewing window 90. It is Specifically, the first hydraulic hose 35L is guided along the outer surface 91a of the tubular portion 91 on the front side of the viewing window 90, and the second hydraulic hose 35R is guided along the tubular portion 91 on the rear side of the viewing window 90. It is guided along the outer surface 91a. As a result, the two hydraulic hoses (the first hydraulic hose 35L and the second hydraulic hose 35R) can be separated and guided, so that the hydraulic hoses can be prevented from interfering with each other or becoming entangled.

As shown in FIGS. 5, 7, 8, and 9, the hydraulic hoses (the first hydraulic hose 35L and the second hydraulic hose 35R) are guided above and below the tubular portion 91 by a plurality of guide members. ing. The plurality of guide members includes 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 a round bar. However, the plurality of guide members need not necessarily include all of the first to seventh guide members, and one or more guide members may be omitted. Also, 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. As shown in FIGS. 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 vertically along the corner edge of the hydraulic oil tank 9, and a horizontal portion 101b that bends 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 the hydraulic hoses (first hydraulic hose 35L, second hydraulic hose 35R) extending along the cylindrical portion 91. As shown in FIGS. The second guide member 102 is attached to the swivel base plate 6 (see FIG. 25) via a stay 95 . The stay 95 is connected to the partition member 96 via a connection plate 99 (see FIG. 7). The partition member 96 is fixed on the swivel base plate 6 with bolts. The partition member 96 extends in the machine width direction in front of the hydraulic oil tank 9 .

The second guide member 102 is fixed to the stay 95 via the mounting plate 97 . The mounting plate 97 is fixed to the upper portion of the stay 95 by a fastener (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 part 102 a is attached to the mounting plate 97 and extends in the front-rear direction below the tubular part 91 . The intermediate portion 102b bends and extends upward from the front end portion of the lower portion 102a. The intermediate portion 102b extends in front of the tubular portion 91 with a length extending from the bottom to the top of the tubular portion 91 . The upper portion 102c is bent from the upper end portion of the intermediate portion 102b and extends rightward (in the direction approaching the hydraulic oil tank 9). 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 fluid tank 9 and below the upper portion 102c. The second hydraulic hose 35R extends through between the lower portion 102a and the wall surface (left wall surface) of the hydraulic oil tank 9. As shown in FIG.

As shown in FIGS. 7, 8, and 9, the third guide member 103 guides the 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 swivel base plate 6 via a stay 95 . The third guide member 103 is attached to an attachment 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 103 a is attached to the mounting plate 97 and extends vertically below the second guide member 102 . The lateral portion 103b bends from the upper end portion of the vertical portion 103a and extends obliquely to the front right. The first hydraulic hose 35L extends downward through between the lateral portion 103b and the hydraulic fluid tank 9. As shown in FIG.

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 behind the hydraulic oil tank 9 . The fourth guide member 104 includes a first vertical portion 104a extending upward from the left portion of the top plate 98, a second vertical portion 104b extending upward from the right portion of the top plate 98, and an upper end portion of the first vertical portion 104a. It has a connecting portion 104c that connects with the upper end portion of the second vertical portion 104b. The upper portions of the first vertical portion 104a and the second vertical portion 104b are curved rearward. The second hydraulic hose 35R is arranged below the connecting portion 104c and behind the first vertical portion 104a and the second vertical portion 104b. The second hydraulic hose 35R abuts on the fourth guide member 104 and extends from the right to the left behind the hydraulic oil tank 9. As shown in FIG.

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 the hydraulic hoses (the first hydraulic hose 35L, the 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 in the bonnet 8 at upper left and upper right portions, respectively. The fifth guide member 105 and the seventh guide member 107 are attached to the rear surface of the top plate of the bonnet 8 . The sixth guide member 106 is attached to a rear plate member 94 fixed to the lower rear 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 regulates the movement of the hydraulic hoses (the first hydraulic hose 35L, the second hydraulic hose 35R) upward and outward of the machine body. The sixth guide member 106 regulates the movement of the hydraulic hoses (the first hydraulic hose 35L and the second hydraulic hose 35R) downward and inward of the machine body. The seventh guide member 107 regulates forward and downward movement of the hydraulic hoses (the first hydraulic hose 35L and the second hydraulic hose 35R).

The first hydraulic hose 35L is inserted into the bonnet 8 from the first opening 80L at the upper left portion 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. After being guided toward the tubular portion 91 by the first guide member 101 , the second guide member 102 and the tubular portion 91 are guided rearward along the bonnet 8 . is guided along the outer surface 91a of the front portion of the , extends further downward, and is further guided downward by the third guide member 103. As shown in FIG.

The second hydraulic hose 35R is inserted into the bonnet 8 from the second opening 80R at the upper right portion 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 guided rearward along the bonnet 8, bends at the right rear portion in the bonnet 8 and extends downward, is guided from the right to the left by the fourth guide member 104, and is guided to the cylindrical portion 91 by the first guide member 101. After being guided toward, it extends further downward while being guided along the outer surface 91 a of the rear portion of the cylindrical portion 91 , and further extends downward through the second guide member 102 and the wall surface of the hydraulic oil tank 9 .

The downwardly extending first hydraulic hose 35L and the second hydraulic hose 35R are bent at the lower portion within the bonnet 8 and extended forward to be connected to control valves that constitute the valve unit 21 .
<Bonnet opening/closing structure>
As shown in FIG. 11, the body 2 is provided with a horizontal shaft 62 that pivotally supports the bonnet 8 so as to be rotatable (openable and closable). The horizontal axis 62 extends in the body width direction. A lower rear portion of the bonnet 8 is pivotally supported to the fuselage 2 so as to be rotatable about a horizontal shaft 62 . As shown in FIG. 12, the bonnet 8 is opened by rotating in a first direction (arrow A direction) about the horizontal axis 62, and rotated in a second direction (arrow B direction) about the horizontal axis 62. closed by As a result, the bonnet 8 can move between an open position (position indicated by phantom lines in FIG. 12) with its front portion raised and a closed position (position indicated by solid lines in FIG. 12) with its front portion lowered.

As shown in FIG. 11 , the working machine 1 includes an auxiliary mechanism 110 that assists the force required for opening and closing the bonnet 8 . The assist 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 that assists rotation in the first direction (direction of arrow A) when opening the hood 8, and rotates in the second direction (direction of arrow B) when closing the hood 8. Apply spring force to assist movement.

As shown in FIGS. 13, 14, and 15, the horizontal shaft 62 includes a first horizontal shaft 62L arranged on one side (left side) in the width direction of the machine body, and a first horizontal shaft 62L arranged on the other side (right side) in the width direction of the machine body. and a second horizontal axis 62R. The first horizontal shaft 62L and the second horizontal shaft 62R are arranged on the same straight line extending in the width direction of the fuselage with a gap in the width direction of the fuselage. Auxiliary mechanism 110 includes a torsion coil spring 111 wound around transverse shaft 62 to apply the spring force described above. Torsion coil spring 111 includes a first spring 111L wound around first horizontal axis 62L and a second spring 111R wound around second horizontal axis 62R.

As shown in FIGS. 13, 14, 15, and 16, the auxiliary mechanism 110 has a first member 112, a second member 113, and a linking member 114. As shown in FIG.
The first member 112 is fixed to the fuselage 2 . Specifically, the first member 112 is fixed to the weight 7 arranged at the rear portion 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 portion of the weight 7 with bolts or the like. The first side plate 112b and the second side plate 112c are spaced apart in the machine body width direction and connected to the front surface of the rear plate 112a. The first side plate 112b is arranged on one side (left side) in the machine body width direction. The second side plate 112c is arranged on the other side (right side) in the machine body width direction. The upper plate 112d extends forward from the upper portion 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 the 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 portion 111b of the torsion coil spring 111 (first spring 111L) is inserted. The insertion hole 112f is an elongated hole extending in an arc around the horizontal shaft 62. As shown in FIG.

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 member 94 fixed to the lower rear 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 about 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 rearward. 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 rearward. The other end of the left member 113L is pivotally supported on the first horizontal shaft 62L. The other end of the right member 113R is pivotally supported on the second horizontal shaft 62R.

The linking member 114 has one end attached to the first member 112 by the first shaft 115 and the other end attached to the second member 113 by the second shaft 116 . The first shaft 115 is inserted into a guide hole 112e formed in the first member 112. As shown in FIG. The guide hole 112e guides the movement of the first shaft 115 accompanying the rotation of the bonnet 8 about the horizontal shaft 62. As shown in FIG.
Torsion coil spring 111 is engaged with first member 112 and 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 engaging portion 112g is formed of notches 112gL and 112gR provided in the upper plate 112d of the first member 112. As shown in FIG. One end 111La of the first spring 111L is engaged with the notch 112gL. One end portion 111Ra of the second spring 111R is engaged with the notch 112gR.
As shown in FIG. 16 and the like, the second locking portion 113a is formed of an elongated hole extending in an arc around the horizontal shaft 62. As shown in FIG. The other end portion 111b of the torsion coil spring 111 penetrates through the insertion hole 112f of the first member 112 and is engaged with an elongated hole forming the second engaging portion 113a. The other end portion 111b of the torsion coil spring 111 moves along the elongated 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 contacts one end (upper end) of the elongated hole forming the second locking portion 113a (see FIG. 16), and the bonnet 8 is closed. When open, it abuts on the other end side (lower end side) 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 portion 111b of the torsion coil spring 111 is positioned in the middle portion of the elongated hole forming the second locking portion 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 positioned on one end side (lower side) of the guide hole 112e, and the other end portion 111b of the torsion coil spring 111 is positioned in the elongated hole forming the second locking portion 113a. It abuts on one end side (upper end side). In this state, the torsion coil spring 111 urges the second member 113 with spring force in the direction of arrow A (first direction). Therefore, when the operator opens the hood 8, the torsion coil spring 111 applies a spring force that assists the rotation in the first direction (the direction in which the hood 8 opens). Thereby, the operator can easily open the hood 8 with a small force.

FIG. 17 shows the state of the auxiliary mechanism 110 when the bonnet 8 is open (fully open). When the bonnet 8 is open, the first shaft 115 is positioned 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 a long hole forming the second locking portion 113a. is in contact with the other end side (lower end side) of the . In this state, the torsion coil spring 111 urges the second member 113 with spring force in the direction of arrow B (second direction). 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 closes). As a result, the operator can easily close the hood 8 with a small force.

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

The auxiliary mechanism 110 is configured to switch the urging direction of the spring force of the torsion coil spring 111 when the bonnet 8 is at an intermediate position between the closed position and the open position. Specifically, when the bonnet 8 is moved (rotated) from the closed position to the open position, the urging 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 bonnet 8 is moved (rotated) from the open position to the closed position, the auxiliary mechanism 110 is such that the urging direction of the spring force of the torsion coil spring 111 is set to the second direction at an 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 assist mechanism 110 assists the rotation in the first direction (the direction to open the bonnet) when the center of gravity of the rotating portion that rotates together with the bonnet 8 is located forward of the rear end 2a of the airframe 2, When the center of gravity of the rotating portion is behind the rear end 2a of the body 2, the rotation in the second direction (the direction to close the hood) is assisted. In the case of this embodiment, the rotating portion 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 portion 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 portion is ahead of the rear end 2a of the fuselage 2. The mechanism 110 assists the rotation in the first direction (arrow A direction). When the rotating portion that rotates together with the bonnet 8 is in the virtual line position (when the bonnet 8 is in the open position), the center of gravity of the rotating portion is behind the rear end 2a of the airframe 2, so the auxiliary mechanism 110 is It assists the rotation in the second direction (direction of arrow B).

The assist mechanism 110 is in a state of assisting rotation in the first direction (a state in which the urging 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 about the horizontal axis 62 . ) and a state in which the rotation in the second direction is assisted (a state in which the spring force of the torsion coil spring 111 is biased in the second direction).
In this case, the auxiliary mechanism 110 rotates in the first direction when the rotation angle about 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 movement and to assist pivoting in the second direction when in the range from the second angle to the open position. Further, the auxiliary mechanism 110 is configured so that the bonnet 8 is rotated from the closed position to the open position when the rotation angle about the horizontal axis 62 is in the range between the first angle and the second angle. 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 is rotated 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 positioned in the middle portion of the elongated hole forming 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 described with a specific example.
It is assumed that the rotation angle of the bonnet 8 about the horizontal axis 62 when the bonnet 8 is in the closed position is 0°, the rotation angle about the horizontal axis 62 when the bonnet 8 is in the open position is 90°, and the first angle is A case where the angle is 35° and the second angle is 55° will be described.
In this case, the assist mechanism 110 assists the rotation in the first direction when the rotation angle of the bonnet 8 about the horizontal axis 62 is within the range from the closed position to the first angle (0° to 35°), Rotation is not assisted when in the range between the first angle and the second angle (35° to 55°), and when in the range from the second angle to the open position (55° to 90°) It assists the rotation in the second direction.

The rotation angle about the horizontal axis 62 when the bonnet 8 is in the open position is not limited to 90°, and may be an angle exceeding 90° or an angle less than 90°. Also, the values of the first angle and the second angle are not limited to the above specific examples, 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).

The size of the second angle is preferably set larger than the size of the first angle (second angle>first angle). As a result, a state (neutral state) in which the auxiliary mechanism 110 does not assist the rotation of the bonnet 8 occurs while the bonnet 8 is between the closed position and the open position. .
However, the first angle and the second angle may be set equal. In this case, the state (neutral state) in which the auxiliary mechanism 110 does not assist the rotation of the bonnet 8 disappears, and the auxiliary mechanism 110 always rotates 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 has a lock mechanism 120 capable of holding the machine body 2 with the bonnet 8 closed. The lock mechanism 120 has 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 portion 121L, the other portion 121R, and a connecting portion 121M. The one portion 121L is arranged on one side (left side) in the width direction of the machine body. The other portion 121R is arranged on the other side (right side) in the machine width direction. The one portion 121L and the other portion 121R each have a base portion 121a, an intermediate portion 121b, and a tip portion 121c. The base end portion 121a is positioned below the receiving member 121 and extends in the front-rear direction. The intermediate portion 121b is bent and extends upward from the rear end of the proximal portion 121a. The tip portion 121c extends obliquely upward and rearward from the upper end of the intermediate portion 121b. The connecting portion 121M extends in the width direction of the body 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). are 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 the mounting bracket 124. As shown in FIG. The mounting bracket 124 is attached to the step plate 26 . As shown in FIG. 11, the step plate 26 is provided in the front part of the fuselage 2 and in front of the driver's seat 5 (in front of the bonnet 8). Therefore, the mounting bracket 124 is fixed to the step plate 26 at the front portion of the fuselage 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 where an operator sitting on the driver's seat 5 places his left foot. The right plate portion 26R is a portion where an operator sitting in the driver's seat 5 places his/her right foot. The central plate portion 26M is positioned higher than the left plate portion 26L and the right plate portion 26R, and connects the left plate portion 26L and the right plate portion 26R. The mounting bracket 124 is fixed to the central plate portion 26M.

In the receiving member 121, the front portion of the base end portion 121a of the one portion 121L (the other end side of the one portion 121L) and the front portion of the base end portion 121a of the other portion 121R (the other end side of the other portion 121R) are attached to the mounting bracket. 124. Thereby, the other end side of the one portion 121L and the other end side of the other portion 121R are fixed to the step plate 26 of the body 2 .
Since the other end side of the one portion 121L and the other end side of the other portion 121R are fixed to the airframe 2 in this way, the receiving member 121 is held on both sides (a state in which both ends are fixed). 121 strength can be improved. Thereby, it is possible to prevent the receiving member 121 from being deformed by the load applied when the bonnet 8 is opened and closed. In the work machine 1 of the present embodiment, since the operation device 30 is mounted on the hood 8, the weight of the rotating portion that rotates together with the hood 8 is increased. 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.

As shown in FIGS. 19 and 20, the locking member 122 has a base portion 122a and a claw portion 122b. The base portion 122 a 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 away from the support shaft 125 . The cylindrical body 126 is fitted on 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 positioned on the distal end side of the locking member 122 and is bent forward.

An operation portion 127 is provided on the opposite side of the cylindrical body 126 of the base portion 122a. The operating portion 127 is a member that the operator grips when switching the lock mechanism 120 between a locked state (a state in which the hood 8 cannot be opened) and a non-locked state (a state in which the hood 8 can be opened). The operating portion 127 is a rod-shaped member, one end of which is connected to the base portion 122 a and the other end of which extends 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 ends. The support 128 is fixed to the back surface (rear surface) of the front portion of the bonnet 8 . Support body 128 includes one plate portion 128L that supports one end of support shaft 125, the other plate portion 128R that supports the other end of support shaft 125, the rear portion of one plate portion 128L, and the rear portion of other plate portion 128R. It has a rear plate portion 128B that connects the . The one plate portion 128L and the other plate portion 128R are arranged parallel to each other with a gap in the machine body width direction.

A front plate 129 is mounted between the front portion of the one plate portion 128L and the front portion of the other plate portion 128R. The front plate 129 is formed with a long hole 129a extending in the vertical direction. The other end side of the operating portion 127 is inserted into the elongated hole 129a. The other end side of the operating portion 127 can swing around the support shaft 125 along the elongated hole 129a.
The cylindrical body 126 , the support shaft 125 and the operating portion 127 constitute an operating mechanism 123 . The operating mechanism 123 moves the locking member 122 between a locking position (solid line position in FIG. 19) where the locking member 122 is locked by the receiving member 121 and a release position (phantom line in FIG. 19) where locking with the receiving member 121 is released (phantom line in FIG. 19). position). The operating mechanism 123 can be operated by gripping the operating portion 127 . When the operation portion 127 is grasped and pulled upward from the state where the locking member 122 is in the locking position (see the solid line in FIG. 19), the locking member 122 rotates upward along with the cylindrical body 126 about the support shaft 125 . , the claw portion 122b is disengaged from the connecting portion 121M of the receiving member 121 (see the phantom line in FIG. 19). As a result, the bonnet 8 is unlocked and unlocked. When the operating portion 127 is grasped and pushed downward from the state where the locking member 122 is in the unlocked position (see the phantom lines in FIG. 19), the locking member 122 rotates downward around the support shaft 125 together with the cylindrical body 126. , the claw portion 122b is engaged with the connecting portion 121M of the receiving member 121 (see the solid line in FIG. 19). As a result, the bonnet 8 is 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 grip the handle 8b to open and close the hood 8. As shown in FIGS.
<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 bonnet 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 longitudinal direction. , 132R. The lower plate 130a is fixed to the upper surface of the bonnet 8 with bolts 131 or 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 spaced apart in the width direction of the machine body and extend in the longitudinal direction parallel to each other. As shown in FIGS. 22 and 23, a support plate 133 that supports the lower portion 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. As shown in FIGS. The rail material 134L and the rail material 134R are spaced apart in the machine body width direction and extend in parallel to each other in the longitudinal direction. The rail member 134L is placed on the slide rail 132L and is slidable in the front-rear direction along the slide rail 132L. The rail member 134R is placed on the slide rail 132R and is slidable in the front-rear direction along the slide rail 132R. The driver's seat 5 supported on the support plate 133 moves in the front-rear direction by the rail members 134L, 134R fixed to the support plate 133 sliding in the front-rear direction along the slide rails 132L, 132R.

As shown in FIGS. 1, 6, 22, 23, etc., the working machine 1 includes a seat belt device 150. As shown in FIGS. The seatbelt device 150 includes a seatbelt 154 worn by a worker seated in the driver's seat 5, a housing portion 152 housing the seatbelt 154, and an engaging portion 153 ( (not shown in FIG. 6).
A seat belt 154 is housed in the housing portion 152 so as to be pulled out. The seat belt 154 has a distal end portion 154 a protruding from the accommodation portion 152 and a base end portion accommodated inside the accommodation portion 152 . A front end portion 154 a of a seat belt 154 pulled out from the housing portion 152 is engaged with the engaging portion 153 .

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

The second support 151R has a second side plate 151Ra and a second support cylinder 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 cylinder 151Rb is connected to the surface (right surface) of the second side plate 151Ra on the outer side of the fuselage, and protrudes outward (to the right) from the surface. 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 attached to the second support cylinder 151Rb so as to be rotatable around the axis in the machine width direction.

A worker seated in the driver's seat 5 can wear the seat belt by pulling out the seat belt stored in the storage portion 152 and engaging the front end of the seat belt with the engaging portion 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 lower plate 130a, the first side plate 151La, and the second side plate 151Ra of the first side plate 151La are formed by bending one plate. 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 member 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 the second side plate 151Ra of the seatbelt 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.

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. Since the first side plate 151La and the second side plate 151Ra are reinforced from the inside of the fuselage by the first reinforcing plate 135L and the second reinforcing plate 135R and connected to the lower plate 130a, the seat bracket 130 and the seat belt support 151 are separated from each other. 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 has 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 portion 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 a space therebetween in the front-rear direction.

As shown in FIGS. 22, 23, etc., the second operation bracket 140R has 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 portion 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 a space therebetween 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 to form the second connection. A plate 140Rc (a second front connection plate 140Rc1 and a 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 is firmly integrated with the seat bracket 130, so that the rigidity of the operation bracket 140 can be improved. In addition, since the first side plate 151La and the second side plate 151Ra of the seatbelt support 151 are reinforced from the outside of the fuselage by the first connection plate 140Lc and the second connection plate 140Rc, respectively, the rigidity of the seatbelt support 151 is increased. improves.

Also, the first reinforcing plate 135L is arranged at a position overlapping the slide rail 132L and the first connection plate 140Lc (first rear connection 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 portion of the seat belt support 151 (first support 151L) by connecting the first lateral plate 140Lb and the first connection plate 140Lc to the first side plate 151La. . The second operation bracket 140R is connected to the right portion of the seat belt support 151 (second support 151R) by connecting the second lateral 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 operation bracket 140 is integrated with the seat belt support 151 and the seat bracket 130 to improve the rigidity. You can get rid of rattling.

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

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

In addition, the peripheral surface includes a rear surface 37d facing the rear side of the fuselage and provided with a second port 37g, and the plurality of hydraulic hoses 35L and 35R are arranged so as to extend from the second port 37g toward the fuselage rear side. .
According to this configuration, there is no need to rapidly bend the hydraulic hoses 35L, 35R from downward to rear below the control valves 32L, 32R. Therefore, it is possible to reduce the load applied to the hydraulic hose and improve the assembling properties of the hydraulic hose.

Further, the block 37 is arranged below the valve body 36 and on an extension line of the axial center (swing center axis 31) La at the connecting portion of the operation levers 31L and 31R with the valve body 36. As shown in FIG.
According to this configuration, the block 37 can be arranged near the operation levers 31L, 31R, so that the control valves 32L, 32R including the block 37 can be configured compactly. As a result, a large space for bending the hydraulic hoses 35L, 35R can be secured, and it is possible to prevent the routing of the hydraulic hoses 35L, 35R by sharply bending them.

The operating levers 31L and 31R are arranged at the front portion of the operating device 30, the support shaft 33 is arranged at the rear portion of the operating device 30, and the hydraulic hoses 35L and 35R have curved portions 59 that curve downward. However, the curved portion 59 is arranged above the support shaft 33 .
According to this configuration, it is possible to secure a large space for bending the hydraulic hoses 35L and 35R downward, so that the bending portion 59 can be curved gently.

Also, 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.
The work machine 1 also includes a prime mover 10 and a bonnet 8 covering the top of the prime mover 10. The driver's seat 5 and the operation device 30 are arranged above the bonnet 8. An opening 80 through which 35R passes is formed, and the opening 80 is provided behind the block 37 and ahead of the support shaft 33 .

According to this configuration, since the opening 80 of the bonnet 8 is positioned near the curved portion 59 of the hydraulic hoses 35L, 35R, the hydraulic hoses 35L, 35R are generally linearly routed from the curved portion 59 to the opening 80 of the bonnet 8. Can be guided over short distances.
The operation device 30 also has brackets (first bracket 41L and second bracket 41R) rotatably supported by the support shaft 33. The brackets 41L and 41R include a front portion 41a that supports the block 37, It has a rear portion 41b supported by the support shaft 33 and a connection portion 41c that connects the front portion 41a and the rear portion 41b. It extends toward the rear portion 41b.

According to this configuration, since the hydraulic hoses 35L, 35R can be arranged along the brackets 41L, 41R, it is possible to easily arrange the hydraulic hoses 35L, 35R to extend rearward.
In addition, the work machine 1 includes a prime mover 10 mounted on the machine body 2 and an upper side of the prime mover 10 which is opened by turning about the horizontal shaft 62 in the first direction and turned about the horizontal shaft 62 in the second direction. and an auxiliary mechanism 110 that biases a spring force that assists the rotation of the bonnet 8 about the horizontal axis 62, and the auxiliary mechanism 110 rotates in the first direction when the bonnet 8 is opened. A spring force is applied to assist rotation, and when the bonnet 8 is closed, a spring force is applied to assist rotation in the second direction.

According to this configuration, the spring force applied by the assist mechanism 110 can assist the necessary force both when the bonnet 8 is opened and when it is closed. Therefore, both opening and closing operations of the bonnet 8 can be easily performed with a small force.
Further, the horizontal shaft 62 includes a first horizontal shaft 62L arranged on one side in the machine width direction and a second horizontal shaft 62R arranged on the other side in the machine width direction. A first spring 111L that is a torsion coil spring 111 that is wound around the first horizontal shaft 62L and applies spring force, and a torsion coil spring that is wound around the second horizontal shaft 62R and applies spring force. a second spring 111R, which is 111;

According to this configuration, since the torsion coil spring 111 and the horizontal shaft 62 are arranged separately on one side and the other side in the machine body width direction, the bonnet 8 can be opened and closed on one side and the other side in the machine body width direction. It can help you balance. In addition, since the space occupied by the auxiliary mechanism 110 within the hood 8 can be reduced, the space within the hood 8 can be effectively utilized.

Further, the assist mechanism 110 assists the rotation in the first direction when the center of gravity of the rotating portion that rotates together with the bonnet 8 is located forward of the rear end 2 a of the airframe 2 , so that the center of gravity of the rotating portion is located at the airframe 2 . assists the rotation in the second direction when the rear end of the .
According to this configuration, the direction of the force assisted by the auxiliary mechanism 110 changes according to the position of the center of gravity of the rotating portion that rotates together with the hood 8, so that the hood 8 can be smoothly opened and closed.

Further, the auxiliary mechanism 110 rotates in the first direction when the rotation angle about the horizontal shaft 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. and assists rotation in the second direction when the range is from a second angle that is greater than or equal to 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 beginning of the operation of opening the bonnet 8 (the range from the closed position to the first angle), the operation of opening the hood 8 can be easily performed. can be done. In addition, since the auxiliary mechanism 110 assists the rotation in the second direction at the beginning of the closing operation of the hood 8 (the range from the open position to the second angle), the closing operation of the hood 8 can be easily performed.

Further, the assist 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 the intermediate position between the open position and the closed position (the range between the first angle and the second angle), a force that assists rotation acts on the bonnet 8. Therefore, it is possible to prevent a force from acting in a direction opposite to the opening/closing operation of the bonnet 8 during the opening/closing operation, so that the opening/closing operation of the bonnet 8 can be performed smoothly.

The auxiliary mechanism 110 includes a first member 112 fixed to the body 2, a second member 113 fixed to the bonnet 8 and rotatable about the horizontal axis 62 with respect to the first member 112, and a first member 113 at one end. a linking member 114 attached to a first member 112 by a first shaft 115 and having the other end attached to a second member 113 by a second shaft 116; and a guide hole 112e for guiding the movement of the first shaft 115 as the bonnet 8 rotates. It has a second locking portion 113a to which the end 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 formed of an elongated hole extending arcuately around the horizontal shaft 62, and the other end of the torsion coil spring 111 forms an elongated hole when the bonnet 8 is closed. When the bonnet 8 is open, it abuts on the other end of the elongated hole.

According to this configuration, when the bonnet 8 is closed, the other end of the torsion coil spring 111 abuts against one end of the elongated hole that constitutes the second locking portion 113a. A force in a first direction can be applied against. Further, when the bonnet 8 is open, the other end of the torsion coil spring 111 contacts the other end of the elongated hole forming the second locking portion 113a. Bi-directional forces can be applied.

The work machine 1 also includes a lock mechanism 120 capable of holding the body 2 with the hood 8 closed. A locking member 122 that can be locked to the receiving member 121 , a locking position where the locking member 122 is locked to the receiving member 121 , and a release position where the locking with the receiving member 121 is released. The receiving member 121 has one portion 121L arranged on one side in the width direction of the machine body, the other portion 121R arranged on the other side in the width direction of the machine body, and one portion and a connecting portion 121M that connects one end side of 121L and one end side of the other portion 121R and to which the locking member 122 is locked. It is fixed to the body 2.

According to this configuration, since the other end side of the one portion 121L and the other end side of the other portion 121R are fixed to the body 2, the receiving member 121 is held on both sides (both ends are fixed). The strength of the receiving member 121 can be improved. Thereby, it is possible to prevent the receiving member 121 from being deformed by the load applied when the bonnet 8 is opened and closed.
The working machine 1 includes a body 2, a hydraulic oil tank 9 mounted on the machine body 2, a working device 4 driven by the working oil stored in the working oil tank 9, a hydraulic hose 35L for circulating the working oil, 35R, and the hydraulic oil tank 9 is provided with a viewing window 90 for making the oil in the hydraulic oil tank 9 visible, and the viewing window 90 is attached and protrudes from the wall surface of the hydraulic oil tank 9 to the hydraulic hoses 35L, 35R. and a tubular portion 91 having an outer surface 91a that guides the .

According to this configuration, the hydraulic hoses 35L and 35R can be guided by the tubular portion 91 having the viewing window 90 that allows the inside of the hydraulic oil tank 9 to be visually recognized. , the oil (oil level) stored in the hydraulic oil tank 9 can be visually recognized well from the outside without being blocked by the hydraulic hoses 35L, 35R. In addition, since the outer surface 91a of the tubular portion 91 functions as a hose guide for guiding the hydraulic hoses 35L and 35R, the number of hose guides can be reduced to reduce the number of parts.

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

According to this configuration, since the first hydraulic hose 35L and the second hydraulic hose 35R can be separated and guided to the position sandwiching the cylindrical portion 91, the first hydraulic hose 35L and the second hydraulic hose 35R can be separated from each other. can be prevented from interfering or entangling.
Also, the cylindrical portion 91 is cylindrical.
According to this configuration, the hydraulic hoses 35L, 35R can be extended along the curve of the outer surface (peripheral surface) 91a of the cylindrical portion 91, so that the hydraulic hoses 35L, 35R can be smoothly guided without being damaged. can.

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

According to this configuration, the first guide member 101 can smoothly guide the hydraulic hoses 35L and 35R toward the cylindrical portion 91 . Moreover, 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.
Also, the first guide member 101 is composed of a round bar attached along the corner edge of the hydraulic oil tank 9 .

According to this configuration, the hydraulic hoses 35L, 35R are directed toward the tubular portion 91 by the first guide member 101 while preventing the hydraulic hoses 35L, 35R from contacting and damaging the corner edges of the hydraulic oil tank 9. You can guide smoothly.
The machine body 2 also has a swivel base plate 6 that can swivel about an axis in the vertical direction. 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 . Moreover, by attaching the second guide member 102 to the swivel base plate 6 having high rigidity, the rigidity of the second guide member 102 can be increased to prevent deformation.
The work machine 1 also includes a valve unit 21 that controls the supply of hydraulic oil to the work device 4 and an operating device 30 that operates the work device 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 connect the operating device 30 and the valve unit 21 to circulate the pilot oil. is a hose.

According to this configuration, the oil stored in the hydraulic oil tank 9 can be visually recognized well from the outside without being blocked by the pilot hoses 35L, 35R.
Further, the viewing window 90 allows the hydraulic oil in the hydraulic oil tank 9 to be visually recognized through the inner space of the cylindrical portion 91 .
According to this configuration, in a state in which the hydraulic hoses 35L, 35R are guided along the outer surface 91a of the cylindrical portion 91, it is possible to visually confirm the working oil through the viewing window 90 without being obstructed by the hydraulic hoses 35L, 35R. .

Further, the work machine 1 includes a body 2, a driver's seat 5 mounted on the body 2, an operation device 30 provided on the side of the driver's seat 5 on the body 2, and a work operated by the operation device 30. The device 4, the seat belt 154 worn by the operator seated in the driver's seat 5, the housing portion 152 housing the seat belt 154, and the tip portion 154a of the seat belt 154 pulled out from the housing portion 152 are engaged. a seat belt device 150 having an engaging portion 153; an operation bracket 140 that supports the operation device 30 on the body 2; Bracket 140 and seat belt support 151 are integrated.

According to this configuration, the operation bracket 140 that supports the operation device 30 on the machine body 2 and the seat belt support 151 that supports the seat belt device 150 on the machine body 2 are integrated. Rigidity is improved, and rattling at the time of operation of the operating device 30 can be prevented.
The work machine 1 also 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, by integrating the seat belt support 151, the operation bracket 140, and the seat bracket 130, the rigidity of the operation bracket 140 can be further improved, and each of them is made separate. The number of parts can be reduced compared to the case.
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 operating bracket 140L that supports the first operating device 30L, and a second operating bracket 140R that supports the second operating device 30R. and slide rails 132L and 132R fixed to the upper surface of the lower plate 130a to allow the driver's seat 5 to slide in the front-rear direction. and a second side plate 151Ra that rises from the other side edge of the lower plate 130a and is connected to the second operation bracket 140R. According to the configuration, the first side plate 151La and the second side plate 151Ra of the seat belt support 151 are erected from the lower plate 130a of the seat bracket 130, so that the seat belt support 151 and the seat bracket 130 are integrated. It can be configured compactly. Further, 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 and the seat belt support 151 and The integrated body of the seat bracket 130 can be constructed compactly.

The seat belt support 151 includes a first support 151L having a first side plate 151La and to which the housing portion 152 is attached; a second support 151R to which the engagement portion 153 is attached and having a second side plate 151Ra; including.
According to this configuration, the first support 151L to which the accommodation portion 152 is attached and the second support 151R to which the accommodation portion 152 is attached are integrated with the seat belt support 151, so that the first support 151L , the second support 151R, and the seat belt support 151 can be improved in rigidity.

The work machine 1 also has a reinforcing member 130b fixed to the upper surface of the lower plate 130a and connecting 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 seatbelt support 151 are integrated via the reinforcing member 130b. The rigidity of the support 151 can be improved.

The first operation bracket 140L includes a first vertical plate 140La facing the first side plate 151La, a first horizontal plate 140Lb connecting the lower portion of the first vertical plate 140La and the first side plate 151La, and the first side plate 151La. and a first connection plate 140Lc that connects the first vertical plate 140La and the first horizontal plate 140Lb. It has a second horizontal plate 140Rb that connects the lower portion 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 (the first operation bracket 140L and the second operation bracket 140R) can be improved by the first connection plate 140Lc and the second connection plate 140Rc.
The work machine 1 also has a first reinforcing plate 135L connecting the first side plate 151La and the lower plate 130a, and a second reinforcing plate 135R connecting the second side plate 151Ra and the lower plate 130a. The first reinforcing plate 135L is arranged at a position overlapping with the slide rails 132L, 132R and the first connecting plate 140Lc in the front-rear direction, and the second reinforcing plate 135R is arranged at a position overlapping with the slide rails 132L, 132R and the second connecting plate 140Rc in the front-rear direction. are placed in overlapping positions.

According to this configuration, the reinforcing effect of the slide rail 132L, the first connecting plate 140Lc, the slide rail 132R, and the second connecting plate 140Rc and the reinforcing effect of the first reinforcing plate 135L and the second reinforcing plate 135R are combined to achieve the seat bracket. 130, the seat belt support 151, and the operation bracket 140, the effect of improving the rigidity 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 scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

Reference Signs List 1 working machine 2 machine body 4 working device 5 driver's seat 6 swivel base plate 9 oil tank 21 valve unit 30 operating device 30L first operating device 30R second operating device 32L pilot valve (first pilot valve)
32R pilot valve (second pilot valve)
35L hydraulic hose (first hydraulic hose 35L)
35R hydraulic hose (second hydraulic hose 35R)
90 Peephole 91 Cylindrical portion 91a Outer surface 101 First guide member 102 Second guide member

Claims (10)

Airframe and
an oil tank mounted on the fuselage;
a working device driven by hydraulic oil stored in the oil tank;
a hydraulic hose for circulating the hydraulic oil;
with
The oil tank is
a viewing window that allows the oil in the oil tank to be viewed;
a tubular portion to which the observation window is attached and which has an outer surface that protrudes from the wall surface of the oil tank and guides the hydraulic hose;
A work machine having a 2. The working machine according to claim 1, wherein a projection length of said tubular portion from said oil tank is set to be equal to or greater than an outer diameter of said hydraulic hose. a driver's seat mounted on the aircraft;
an operating device for operating the working device;
with
The operating device includes a first operating device provided on one side of the driver's seat and a second operating device provided on the other side of the driver's seat,
The hydraulic hose includes a first hydraulic hose connected to the first operating device and a second hydraulic hose connected to the second operating device,
3. The working machine according to claim 1, wherein the first hydraulic hose and the second hydraulic hose are guided along outer surfaces of the cylindrical portion on opposite sides of the viewing window. The work machine according to any one of claims 1 to 3, wherein the tubular portion is cylindrical. The tubular portion has a cylindrical shape with an axis extending in a substantially horizontal direction,
The working machine according to claim 4, wherein the hydraulic hose extends vertically along the outer surface of the tubular portion. The working machine according to any one of claims 1 to 5, wherein the oil tank is attached with a first guide member that guides the hydraulic hose toward the cylindrical portion. 7. The working machine according to claim 6, wherein said first guide member comprises a round bar attached along a corner edge of said oil tank. The fuselage has a turning base that can turn around an axis in the vertical direction,
The work machine according to any one of claims 1 to 7, wherein a second guide member that guides the hydraulic hose extending along the cylindrical portion is attached to the turning base plate. a valve unit that controls supply of hydraulic oil to the working device;
an operating device for operating the working device,
The operating device has a pilot valve that controls the supply of pilot oil for operating the valve unit,
The working machine according to any one of claims 1 to 8, wherein the hydraulic hose is a pilot hose that connects the operating device and the valve unit to distribute the pilot oil. The work machine according to any one of claims 1 to 9, wherein the viewing window enables the working oil in the oil tank to be viewed through the inner space of the cylindrical portion.

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