JP6304289B2 - Work machine - Google Patents

Description

  The present invention relates to a working machine such as a hydraulic excavator, and particularly relates to a pilot hose wiring structure.

  Generally, in such work machines, an upper frame having excellent strength and rigidity is installed on a lower traveling body having a traveling device such as a crawler, and the upper frame is configured by a boom, an arm, or the like. A machine room containing an attachment, an engine, a hydraulic pump, etc., a driver's cab in which a driver's seat, an operation lever, and the like are arranged.

  The work machine is configured such that various operations such as traveling and excavation can be performed by an operator operating an operation lever, a traveling lever, and the like to hydraulically control a crawler and an attachment. A large number of pilot hoses are connected to the operation lever or the like in order to perform hydraulic control, and the bundle of pilot hoses is connected to a hydraulic control device installed in the upper frame.

  Of the driver's cab, the area around the driver's seat where the control levers are installed on the left and right are assembled independently as a subunit and retrofitted to the upper frame in order to improve work efficiency. (For example, Patent Document 1 and Patent Document 2).

  When the sub unit is retrofitted to the upper frame, an operation of connecting the left and right operation levers installed in the sub unit and the hydraulic control device installed in the upper frame with a pilot hose is performed. In the connection work, since it is necessary to connect a large number of pilot hoses to the connection part of the hydraulic control device located densely under the floor of the subunit, there is a problem that workability is poor.

  Therefore, in the hydraulic excavators of Patent Document 1 and Patent Document 2, a bracket that relays the pilot hose is installed in the subunit, and the pilot hose is divided into the operation lever side and the hydraulic control device side, and these pilot hoses are divided into the pilot hoses. The connection is made via a bracket.

  For example, in the hydraulic excavator of Patent Document 1, the bracket is provided so as to protrude downward from the floor plate of the subunit. The pilot hoses of the left and right control levers are connected to a large number of joints arranged in the bracket in a state of being arranged under the floor, and the pilot hoses on the hydraulic control device side are connected to the corresponding joints.

  In the hydraulic excavator of Patent Document 1, since the bracket is arranged in the back of the floor, there is a problem that it is difficult to connect the pilot hose, such as being difficult to reach when attaching the subunit to the upper frame. In the hydraulic excavator of Literature 2, a bracket is installed at the left end in the seat stand exposed by opening the lower cover of the left operation lever.

JP 2003-41621 A JP 2007-303213 A

  In the case of the hydraulic excavator disclosed in Patent Document 2, since the bracket is disposed on the floor and the bracket is exposed when the cover is opened, the pilot hose can be connected more easily than the hydraulic excavator disclosed in Patent Document 1. .

  However, because the bracket is placed directly under the left operating lever, the pilot hose of the right operating lever is routed along the lower edge on the front side of the seat stand and then introduced into the accommodating space with the bracket. doing. In addition, the joint of the bracket is mounted on a plate that is erected in the front-rear direction, and the pilot hose of the right operating lever is connected to the joint from the rear, so that the routing is roundabout. ing.

  Furthermore, with the bracket, the joints that connect the pilot hoses of the left and right control levers are gathered on the plate in a state where they are adjacent vertically and horizontally, which increases the number of parts and increases the cost. The pilot hose is in the way, and there is a problem that tools such as a spanner are difficult to handle.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a work machine that can efficiently route pilot hoses for left and right control levers and that can perform connection work more easily.

  The present invention relates to a work machine in which a machine body is installed on a lower traveling body.

  The machine body includes a hydraulic control device that hydraulically controls the work machine, an operation unit that constitutes a cab where the operation of the work machine is performed, and the hydraulic control device and the operation unit supported by the lower traveling body An upper frame on which is installed. The operation unit includes a lower panel that is attached to the upper frame, a seat stand that is assembled in a table shape on the lower panel, and a driver's seat installed on the upper part, and first and second that are disposed on both the left and right sides of the driver's seat. A first operating lever and a second operating lever; and a routing port provided in the lower panel so as to be positioned below the first operating lever and disposed in an outer edge portion of the upper frame. Yes.

  The first operating lever is connected to the hydraulic control device by a bundle of first pilot hoses routed through the routing port, and the second operating lever is passed through the routing port and the seat stand. It is connected with the said hydraulic control apparatus by the bundle | bundle of the routed 2nd pilot hose. A plurality of pilot hoses in the bundle of second pilot hoses are relayed via hose connectors fixed inside the seat stand.

  That is, according to this work machine, the bundle of the first pilot hoses connected to the first operation lever is connected to the hydraulic control device through the routing port located below and on the outer edge of the upper frame. Can be routed efficiently and easily. The second pilot hose bundle connected to the second operating lever is connected to the hydraulic control device through the seat stand and the routing port, so that it can be routed at a short distance without being routed. Can be routed efficiently and easily.

  In addition, since a plurality of pilot hoses are relayed through hose connectors fixed inside the seat stand, the pilot hose connection work can be performed separately on the operation unit side and the upper frame side. , Work load can be reduced. Since the connection work of the hose connector part can be performed on the floor, the work load can be further reduced.

  Furthermore, since the hose connector relays only the second pilot hose at most, the number of joints can be reduced, the number of parts can be reduced, and the size can be reduced. Therefore, the hose connector can be installed in a limited space. The pilot hose can be routed efficiently.

  In a specific example disclosed, the seat stand is detachable in front of the rear panel, an upper panel on which the driver's seat is installed, a rear panel that is erected on the lower panel and connected to the upper panel, and And a front cover which is attached and constitutes a front surface of the seat stand. The rear panel is provided with a maintenance opening to which an inner cover is detachably attached, and the hose connector is arranged at a position not overlapping the maintenance opening.

  According to this specific example, since the hose connector is installed on the front portion of the seat stand that is released by removing the front cover, a sufficient working space can be secured and connection work can be easily performed. In addition, since the hose connector is arranged at a position that does not overlap the front and rear maintenance openings provided in the seat stand, when performing maintenance or the like through the maintenance openings, the hose connector is connected to the hose connector. The bundle of two pilot hoses does not get in the way and can be easily operated.

  In this case, the hose connector may include a bracket fixed to the rear panel and a plurality of joints supported by the bracket and extending substantially parallel to the left-right direction.

  By doing so, the hose connector can be installed without any trouble even in a narrow space with a narrow front and rear width, and can be efficiently routed without handling the bundle of second pilot hoses.

  Furthermore, it is preferable that the plurality of joints include a front row joint and a rear row joint arranged in two rows in the front and rear, and the front row joint and the rear row joint are arranged offset.

  If it does so, since operation of a tool can be performed even if it collects each joint, a hose connector can be made smaller and it can install in a narrow space.

  Still further, the routing port is composed of a first routing port and a second routing port formed side by side on the lower panel, and the bundle of the first pilot hoses is the first routing port. The bundle of the second pilot hoses may be routed through the second routing opening.

  If it does so, the operation | work which routes the bundle | flux of the 1st and 2nd pilot hose will become easy, and the bundle | flux of the 1st and 2nd pilot hose can be routed by the optimal path | route.

  According to the work machine of the present invention, the pilot hoses of the left and right operation levers can be routed efficiently, and the connection work of the pilot hoses can be performed more easily.

It is a schematic side view showing a hydraulic excavator of an embodiment. It is a schematic perspective view which shows the principal part of a machine main body. It is a schematic plan view which shows the principal part of an upper frame. It is a schematic perspective view which shows the structure of an operation unit. It is the schematic which looked at the inside of a seat stand from the front. It is the schematic which shows the structure of a hose connector. The left part of the figure represents a front view, and the right part represents a side view.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use.

  FIG. 1 shows a hydraulic excavator 1 (an example of a work machine) to which the present invention is applied. The hydraulic excavator 1 is a 2t class small excavator, and is composed of a lower traveling body 2 having a pair of crawlers 2a and 2a driven by a hydraulic motor, and a machine main body 3 that is rotatably installed on the lower traveling body 2. ing. Note that directions such as front and rear, left and right used in the following description are based on the machine body 3.

  The machine body 3 is provided with an attachment 4, a canopy 5, a machine room 6, and the like. The attachment 4 includes a bucket 4a, an arm 4b, a boom 4c, and a hydraulic cylinder 4d that moves these. By controlling the hydraulic cylinder 4d, the bucket 4a and the like rotate, and various operations such as excavation can be performed. The attachment 4 is pivotally supported at the front portion of the machine body 3 so that the work is performed in front of the machine body 3.

  The canopy 5 is a release type cab where the hydraulic excavator 1 is operated. In this model, the canopy 5 is arranged at the left front corner of the machine body 3. As shown in FIG. 2, a trapezoidal seat stand 10 is installed at the rear of the canopy 5, and a driver's seat 11 is installed thereon. A floor panel 12 is installed in front of the canopy 5, and a travel lever 12 a and an operation pedal 12 b are installed on the floor panel 12.

  On the left and right sides of the driver's seat 11, control boxes 14 having operation levers 13 are installed. With these operation levers 13, the boom 4 c, the arm 4 b and the bucket 4 a are rotated and the machine body 3 is rotated. In the case of this model, since the left side of the canopy 5 is the entrance to the canopy 5, the left control box 14 located on the left side of the machine body 3 is flipped up so that the operator can easily get on and off. By operating the lever 15, it is configured to tilt backward. The rear part of the canopy 5, that is, the seat stand 10, the driver's seat 11, the operation lever 13, and the like are configured by an operation unit 40 that can be assembled independently so that assembly work can be performed efficiently (details will be described later). .

  A machine room 6 (rear machine room 6) covered with a rear cover is arranged on the rear side of the canopy 5, and a machine room 6 (side machine room 6) covered with a side cover is arranged on the right side of the attachment 4. Has been placed.

  As shown in FIG. 3, the machine body 3 is provided with an upper frame 20 that is supported by the lower traveling body 2 so as to be able to turn, and that turns by driving of a turning motor. The upper frame 20 is composed of a bottom plate, a vertical plate, a beam plate, and the like, and has a structure excellent in strength and rigidity. The canopy 5, the attachment 4, and the machine room 6 are installed on the upper frame 20, and the attachment 4 is pivotally supported by a pair of vertical plates 21 and 21 arranged on the right front side of the bottom plate.

  In this hydraulic excavator 1, a fuel tank 22, a hydraulic oil tank 23, and the like are installed in a part constituting the side machine chamber 6 of the upper frame 20, and in a part constituting the rear machine chamber 6 of the upper frame 20, Drive devices such as the engine 24 and the hydraulic pump 25 are installed. The engine 24 is placed horizontally so that the drive shaft faces in the left-right direction. The hydraulic pump 25 is disposed at the left end of the engine 24 and is connected to the drive shaft of the engine 24. A starter motor 26 for starting the engine 24 is disposed below the front side portion of the engine 24.

  Under the floor of the canopy 5, a narrow underfloor space is expanded, and the hydraulic control device 30 is installed in the underfloor space. The hydraulic control device 30 is a device that controls the hydraulic pressure used to drive the crawler 2a, the attachment 4, and the like, and includes a control valve 31, an operation pattern switching valve 32, a hydraulic pressure supply valve 33, and the like. The control valve 31 is disposed at the back of the underfloor space, and the operation pattern switching valve 32 and the hydraulic pressure supply valve 33 are disposed at an outer edge portion (an inner portion along the outer edge) of the upper frame 20 that is an end portion of the underfloor space. Has been. A large number of hydraulic hoses and pilot hoses are arranged around the hydraulic control device 30 in a dense state, but are not shown in FIG.

  The control valve 31 is composed of a control valve complex configured by connecting a plurality of control valves in parallel, and is installed on the upper frame 20 so as to extend in the front-rear direction. Each control valve of the control valve 31 includes a hydraulic hose that supplies oil from the hydraulic pump 25 and returns the oil to the hydraulic oil tank, a hydraulic motor of each hydraulic cylinder 4d of the attachment 4 and each crawler 2a, and a swing motor. A hydraulic hose and the like for supplying and returning oil are connected.

  A number of pilot hoses for supplying and returning pilot pressure are also connected to each control valve of the control valve 31. These pilot hoses are connected to the travel lever 12a, the operation pedal 12b, and the operation lever 13, and supply pilot pressure to each control valve in accordance with the operation of the travel lever 12a and the like. Thereby, the supply of oil to each control valve of the control valve 31 is controlled, and the attachment 4 and the like are driven accordingly.

  In this model, an operation pattern switching valve 32 is installed in the path of a pilot hose connecting the operation lever 13 and the control valve 31. The operation pattern switching valve 32 is a device that enables switching of the operation of the attachment 4 or the like in response to the operation of the operation lever 13. By installing the operation pattern switching valve 32, it is possible to switch to an operation pattern that suits the operator's preference.

  The hydraulic supply valve 33 is a device that receives supply of pressure oil from the hydraulic pump 25 and supplies pilot pressure to the operation lever 13 and the like. The hydraulic pressure supply valve 33 and the operation lever 13 are connected by a pilot hose that supplies and returns pressure oil.

(Operation unit)
FIG. 4 shows the operation unit 40. The operation unit 40 includes a lower panel 41, a seat stand 10, a driver's seat 11, a control box 14, an operation lever 13, and the like.

  The lower panel 41 is a plate-like member that is attached to the upper frame 20 so as to be continuous with the rear portion of the floor panel 12. The seat stand 10 is a table-like member assembled on the lower panel 41, and includes an upper panel 42, a rear panel 43, a side panel 44, a front cover 45, a side cover 46, an inner cover 47, and the like. Yes.

  The upper panel 42 is made of a plate-like member that extends in the left-right width direction so as to face the lower panel 41 in the vertical direction. The driver's seat 11 is installed in the middle of the upper panel 42 in the width direction, and the control box 14 including the operation lever 13 is assembled to the upper panels 42 on both the left and right sides of the driver's seat 11 (operation lever). 13 are distinguished from each other by the left operating lever 13 as the first operating lever 13a and the right operating lever 13 as the second operating lever 13b).

  The rear panel 43 is formed of a substantially L-shaped member erected on the lower panel 41, and an upper end thereof is connected to the upper panel 42. The rear panel 43 includes a front surface portion 43a facing forward and a left side surface portion 43b extending rearward from the left end of the front surface portion 43a and facing leftward. The side panel 44 is erected on the lower panel 41 while being connected to the right ends of the rear panel 43 and the upper panel 42.

  A maintenance opening 43c is formed in the lower right portion of the front surface portion 43a, and an internal cover 47 that closes the maintenance opening 43c from the front is detachably attached to the front surface portion 43a. The front cover 45 is a member that constitutes the front surface of the seat stand 10, and is detachably attached to the seat stand 10 so as to cover the front surface portion 43a from the front. The side cover 46 is a member constituting the left end portion of the seat stand 10, and is detachably attached to the seat stand 10 so as to cover the left side surface portion 43b. The front cover 45 and the side cover 46 are designed to be attached to the seat stand 10 so that a space (gap space) is formed between the front cover 45 and the front surface portion 43a and the left side surface portion 43b.

  The lower panel 41 on the lower side of the first operation lever 13a facing the gap space is formed with two sideways and two routing holes 48 (an example of a routing hole) (in order to distinguish the routing holes 48). (The left port 58 is the first port 48a, and the right port 48 is the second port 48b). A hose connector 50 is fixed to the front surface portion 43a facing the gap space. As shown in FIG. 5, the hose connector 50 is disposed at a position away from the maintenance opening 43c so as not to overlap the maintenance opening 43c in the front-rear direction.

(Hose connector)
FIG. 6 shows details of the hose connector 50. The hose connector 50 includes a bracket 51 and a plurality (four in this embodiment) of joints 52. The bracket 51 is a substantially L-shaped member having a plate-shaped mounting seat portion 51a and a support portion 51b. The mounting portion 51a is bolted to the front surface portion 43a, so that the support portion 51b is a plate in the left-right direction. It is erected on the front surface portion 43a with the surface facing.

  Each joint 52 is formed in a tube shape having fastening portions 53 at both ends, and is supported by the support portion 51b so as to extend substantially parallel to the left-right direction while penetrating the plate surface. These joints 52 include a front row joint 52a and a rear row joint 52b arranged in two rows. The front row joint 52a and the rear row joint 52b are each composed of two joints 52 arranged in a vertical row, and are arranged so as to be offset (displaced) in the vertical direction. Further, the front row joint 52a is formed shorter than the rear row joint 52b so that the fastening portion 53 of the front row joint 52a and the fastening portion 53 of the rear row joint 52b are offset in the left-right direction.

  As shown in FIG. 4, two short pilot hoses 61 and four long pilot hoses 62 are connected to the first operating lever 13a. The two pilot hoses 61 are routed to the hydraulic pressure supply valve 33 to supply pilot pressure to the operation lever 13, and the four pilot hoses 62 supply the pilot pressure to each control valve of the control valve 31. Therefore, the operation pattern switching valve 32 connected to these control valves is routed. A bundle of these pilot hoses 61 and 62 (first pilot hose bundle) is routed under the lower panel 41 through the first routing port 48a.

  On the other hand, two long pilot hoses 63 routed to the hydraulic pressure supply valve 33 and four short pilot hoses 64 routed to the operation pattern switching valve 32 are connected to the second operation lever 13b. ing. In the second operation lever 13b, the four pilot hoses 64 arranged in the operation pattern switching valve 32 are connected to the upstream pilot hose 64a and the downstream in order to easily connect the bundle of pilot hoses 63 and 64. These pilot hoses 64a and 64b are connected to the hose connector 50 and relayed. A bundle of pilot hoses 63 and 64 (second pilot hose bundle) of the second operating lever 13b is routed inside the seat stand 10 and below the lower panel 41 through the second routing opening 48b.

  As shown in FIG. 5, the plugs 65 provided at the tips of the four upstream pilot hoses 64a are fastened to the fastening portions 53 of the joints 52 that protrude to the right. At the time of fastening, an operation of screwing the plug 65 into the fastening portion 53 with a tool such as a spanner is performed. At that time, a space for operating the tool is required around the fastening portion 53. In this hose connector 50, the total number of joints 52 is small, and the fastening portions 53 of the joints 52 are offset. Therefore, the tool can be operated even if the joints 52 are gathered. As a result, the hose connector 50 can be downsized, and the hose connector 50 can be arranged in a limited space with a narrow gap space.

  By connecting the four upstream pilot hoses 64a to the hose connector 50, the upstream pilot hoses 64a can be routed in the seat stand 10 by the shortest path, and interference with the detaching operation of the inner cover 47 is avoided. Held in a possible position. The two long pilot hoses 63 are also held in an optimal position by being fastened to one of the upstream pilot hoses 64a by a fastener such as a band. The two pilot hoses 63 are routed to the lower side of the lower panel 41 through the second routing port 48b.

  The operation unit 40 assembled in this manner is installed on the upper frame 20 at a position indicated by a virtual line in FIG. The rear machine room 6 is located immediately after the operation unit 40, and the canopy 5 and the rear machine room 6 are partitioned by the seat stand 10. The front part of the rear machine room 6 enters the lower side of the seat stand 10 and is designed so that the starter motor 26 requiring maintenance work is located in the vicinity of the maintenance opening 43c.

  After installing the operation unit 40 in the upper frame 20, the connection work of the pilot hoses 61 to 64 is performed. Since the routing port 48, the hydraulic pressure supply valve 33, and the operation pattern switching valve 32 are disposed at the outer edge portion of the upper frame 20, the pilot hoses 61 to 64 can be connected to them relatively easily. However, since the operation pattern switching valve 32 has a large number of pilot hoses to be connected and the connection portions 32a are arranged in a concentrated manner, the connection work is not easy.

  On the other hand, in the hydraulic excavator 1, the four downstream pilot hoses 64b are separated from the operation unit 40, and therefore can be connected in advance to the operation pattern switching valve 32 as shown in FIG. . By doing so, the work of connecting the pilot hose to the operation pattern switching valve 32 is divided in two, so that the work burden can be reduced.

  The four downstream pilot hoses 64b connected to the operation pattern switching valve 32 are routed to the upper side of the lower panel 41 through the second routing port 48b and then connected to the hose connector 50. At this time, since the bundle of the downstream pilot hoses 64b is passed through the second routing port 48b different from the first routing port 48a through which the first pilot hose bundle is passed, it can be easily routed. In addition, the bundle of the first and second pilot hoses can be routed by an optimum route.

  Since the first operation lever 13a is provided in the left control box 14, it is moved rearward when the operator gets on and off. The bundle of first pilot hoses that is pulled along with it is accommodated in a state of being bent in the gap space, and is bent and extended inside the gap space. Therefore, when the bundle of the first and second pilot hoses is routed through one routing port, the pilot hoses rub against each other, but such a problem can be solved by making the routing ports separate.

  By installing the hose connector 50 on the front surface portion 43a of the seat stand 10, a sufficient work space can be secured and the connection work can be easily performed. At this time, the plug 65 provided at the tip of each downstream pilot hose 64b is fastened to the fastening portion 53 of each joint 52 protruding leftward, but the fastening portion 53 of each joint 52 is offset. So you can connect easily. Since there is no need for routing, the downstream pilot hose 64b can also be routed with the shortest path.

  As shown in FIG. 5, in order to block the canopy 5 from the underfloor space, a seal member 67 is attached to each of the first routing port 48a and the second routing port 48b. By these sealing members 67, the gap between the bundle of the first and second pilot hoses is sealed. By dividing the routing opening into two parts, each hole diameter becomes small and it becomes easy to seal, so the sealing performance is also improved.

  Since the second pilot hose bundle is routed away from the inner cover 47, when the starter motor 26 is maintained, the rear machine room 6 can be easily accessed through the maintenance opening 43c. Since the second pilot hose bundle is supported by the hose connector 50, it is not necessary to provide a separate bracket 51 or the like.

  Since only a part of the pilot hose 64 that is difficult to connect in the second pilot hose bundle is relayed by the hose connector 50, the number of the joints 52 is reduced, and the small hose connector 50 can be efficiently routed. It is possible. In the case of this hydraulic excavator 1, since the pilot hose 64 connected to the operation pattern switching valve 32 is relayed by the hose connector 50, the connection between the upstream pilot hose 64a and the downstream pilot hose 64b at the hose connector 50 is established. By changing, it is also possible to change the operation pattern of the right operation lever 13.

  In addition, the working machine according to the present invention is not limited to the above-described embodiment, and includes various other configurations. For example, the cab is not limited to the canopy 5. A box-shaped cab (cab) whose periphery is covered with a window or a panel may be arranged. The operation pattern switching valve 32 is not essential, and the downstream pilot hose 64 b may be directly connected to the control valve 31. There may be one routing port, and the shape may be a notch. The arrangement of the left and right operation levers may be reversed.

1 Hydraulic excavator 3 Machine body 4 Attachment 5 Canopy (cab)
DESCRIPTION OF SYMBOLS 10 Seat stand 11 Driver's seat 11 Operation lever 11a 1st operation lever 11b 2nd operation lever 20 Upper frame 30 Hydraulic control apparatus 40 Operation unit 41 Lower panel 43c Maintenance opening 48 Arrangement port 48a 1st arrangement port 48b 2nd arrangement Port 50 Hose connectors 61 to 64 Pilot hose 64a Upstream pilot hose 64b Downstream pilot hose

Claims (5)

A work machine in which a machine body is installed on a lower traveling body,
The machine body is
A hydraulic control device that hydraulically controls the work machine;
An operation unit constituting a cab where the work machine is operated;
An upper frame supported by the lower traveling body and on which the hydraulic control device and the operation unit are installed;
With
The operation unit is
A lower panel attached to the upper frame;
A seat stand assembled on the lower panel in a trapezoidal shape with a driver's seat installed at the top;
A first operating lever and a second operating lever disposed on the left and right sides of the driver seat;
A wiring port provided in the lower panel so as to be located on the lower side of the first operating lever, and a routing port disposed in an outer edge portion of the upper frame;
Have
The first operation lever is connected to the hydraulic control device by a bundle of first pilot hoses routed through the routing port,
The second operation lever is connected to the hydraulic control device by a bundle of second pilot hoses routed through the routing port and the seat stand,
A plurality of pilot hoses in the bundle of second pilot hoses are relayed via a hose connector fixed inside the seat stand ;
The seat stand is
An upper panel on which the driver's seat is installed;
A rear panel erected on the lower panel and connected to the upper panel;
A front cover that is detachably attached to the front of the rear panel and constitutes a front surface of the seat stand;
Have
A work machine in which a maintenance opening to which an inner cover is detachably attached is provided in the rear panel, and the hose connector is arranged at a position that does not overlap the maintenance opening . The work machine according to claim 1,
A work machine in which the hose connector has a bracket fixed to the rear panel and a plurality of joints supported by the bracket and extending substantially in parallel in the left-right direction. The work machine according to claim 2,
A work machine including a front row joint and a rear row joint in which the plurality of joints are arranged in front and rear two rows, and the front row joint and the rear row joint are arranged offset. In the work machine according to any one of claims 1 to 3,
The routing port is composed of a first routing port and a second routing port formed side by side on the lower panel, and the bundle of the first pilot hoses is routed through the first routing port. A work machine in which the bundle of second pilot hoses is routed through the second routing port. A work machine in which a machine body is installed on a lower traveling body,
The machine body is
A hydraulic control device that hydraulically controls the work machine;
An operation unit constituting a cab where the work machine is operated;
An upper frame supported by the lower traveling body and on which the hydraulic control device and the operation unit are installed;
With
The operation unit is
A lower panel attached to the upper frame;
A seat stand assembled on the lower panel in a trapezoidal shape with a driver's seat installed at the top;
A first operating lever and a second operating lever disposed on the left and right sides of the driver seat;
A wiring port provided in the lower panel so as to be located on the lower side of the first operating lever, and a routing port disposed in an outer edge portion of the upper frame;
Have
The first operation lever is connected to the hydraulic control device by a bundle of first pilot hoses routed through the routing port,
The second operation lever is connected to the hydraulic control device by a bundle of second pilot hoses routed through the routing port and the seat stand,
A plurality of pilot hoses in the bundle of second pilot hoses are relayed via a hose connector fixed inside the seat stand;
The routing port is composed of a first routing port and a second routing port formed side by side on the lower panel, and the bundle of the first pilot hoses is routed through the first routing port. A work machine in which the bundle of second pilot hoses is routed through the second routing port.

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