JP2017180067A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine capable of suppressing enlargement of an outer shape even if a fitting part for fitting an accessory such as a hanging fitting is formed on an additional weight (a second weight).SOLUTION: A work machine comprises: a first weight, which has a machine body, a first fixed part that is fixed to the machine body, and a concavity that is depressed from a surface on opposite side of the machine body toward the machine body; and a second weight, which has a second fixed part that is fixed to the first weight, a projection that projects from a first surface on the first weight side into the concavity, and a fitting part that is formed at a position facing the projection on a second surface on opposite side of the first surface and can be fitted with an accessory.SELECTED DRAWING: Figure 37

Description

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

Conventionally, a working machine (backhoe) disclosed in Patent Document 1 is known.
The work machine disclosed in Patent Document 1 includes a machine body (swivel base), a weight provided at the rear part of the machine body, and an additional weight (second weight) attached to the outer surface of the weight.

JP 2005-307560 A

By the way, in a working machine, the screw hole for attaching accessories, such as a hanging metal fitting, may be provided in the outer surface of weight.
However, in the working machine, since the screw hole is closed when the additional weight is mounted, it is necessary to separately provide the additional weight with a screw hole for attaching the accessory. In this case, there is a problem that the outer shape of the working machine becomes large because it is necessary to form an additional weight thick in order to provide the screw hole.

  The present invention has been made to solve the above-described problems of the prior art, and has an outer shape even when an attachment portion for attaching an attachment such as a hanging bracket is provided on an additional weight (second weight). An object of the present invention is to provide a working machine capable of suppressing the increase in the number of the working machines.

  A work machine according to an aspect of the present invention includes a first weight having a machine body, a concave portion that is recessed from the surface opposite to the machine body toward the machine body, and a first fixing portion that is fixed to the machine body. A second fixing portion fixed to the first weight, a projecting portion projecting into the recess from the first surface which is a surface on the first weight side, and a surface opposite to the first surface. A second weight having a mounting portion provided at a position corresponding to the protruding portion of the second surface and capable of mounting an accessory.

  According to the work machine described above, since the protruding portion provided on the second weight protrudes into the concave portion provided on the first weight, the attachment is provided at a position corresponding to the protruding portion and can be attached with an accessory. The thickness of the part can be increased without increasing the outer shape of the airframe including the second weight.

It is the perspective view which looked at the body from the right front. It is a perspective view which shows the inside of the center frame which looked at the body from the right front. It is a perspective view inside an airframe. It is a top view inside an airframe. It is a perspective view inside the left side of an airframe. It is a perspective view of a 1st control valve. It is the perspective view which looked at the circumference of the front part of the 1st control valve from back. It is a top view of a switching valve. It is a front side view which shows the relationship between a switching valve and a 1st control valve. It is the perspective view which looked at the circumference of the front part of the 1st control valve from the front. It is an enlarged view of FIG. It is the perspective view which looked at the circumference of the 2nd bracket from the left rear. It is a perspective view of a hydraulic oil tank. It is a top view of a hydraulic oil tank. It is a perspective view of the state where the 2nd control valve was attached to the bracket. It is the perspective view which looked at the downward direction of the step from the left. It is the side view which looked at the upper part of the step from the left. It is a top view around a driver's seat. It is a perspective view which shows the relationship between a 1st connection tool and a hose. It is the perspective view which looked at the support | pillar etc. of the cabin from the front. It is the perspective view which looked at the cabin from the lower part. It is a perspective view which shows the relationship between a reinforcement member and a support | pillar. It is an expansion perspective view of the 1st reinforcing material. It is a perspective view which shows the relationship between a 2nd reinforcement material and a support | pillar. It is a figure which shows the state which welded the 1st reinforcement material to the lower board and the support | pillar. It is a perspective view which shows the relationship between a 3rd reinforcement material and a support | pillar. It is a perspective view which shows the relationship between a floor mat and a 1st reinforcement material. It is the elements on larger scale of a floor mat. It is the figure which looked at the state where the worker sat down in the driver's seat from the front. It is the perspective view which looked at the step which provided the relay plate from the downward direction. It is the perspective view which looked at the relay plate from the left. It is the perspective view which looked at the relay plate from the right. It is a perspective view which shows the relationship between a step and a relay plate. It is the rear view which looked at the 1st weight from back. It is the perspective view which looked at the 2nd weight from the back side. It is the perspective view which looked at the 2nd weight from the front side. It is a rear view in the state where the 2nd weight was attached to the 1st weight. It is a transverse cross section of the state where the 2nd weight was attached to the 1st weight. It is a top view explaining arrangement | positioning of the apparatus on a body. It is a side view which shows the whole structure of a working machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 40 is a schematic diagram illustrating the overall configuration of the work machine 1 according to the present embodiment. In the present embodiment, a backhoe that is a turning work machine is illustrated as the work machine 1.
The work machine 1 includes a machine body (swivel base) 2, a traveling device 3, and a work device 4.
A cabin 5 is mounted on the body 2. As shown in FIG. 39, a driver's seat 6 is provided in the cabin 5. In the present embodiment, the front side (left side in FIG. 40) of the driver seated on the driver's seat 6 of the work machine 1 is the front side, the rear side of the driver (right side in FIG. 40) is the rear side, and the left side of the driver (in FIG. 40). Description will be made assuming that the front side is the left side and the right side of the driver (the back side in FIG. 40) is the right side. In addition, the horizontal direction K2 (see FIG. 39) that is orthogonal to the front-rear direction K1 (see FIG. 40) and parallel to the ground surface will be described as the body width direction. Further, the direction from the center of the machine body 2 in the machine body width direction to the right part or the left part will be described as the outside of the machine body. In other words, the outward direction of the airframe is the direction of the airframe width and away from the center of the airframe 2 in the airframe width direction. The direction opposite to the outside of the aircraft will be described as the inside of the aircraft. In other words, the in-machine direction is the direction in the width direction of the airframe and approaching the center of the airframe 2 in the width direction of the airframe. In this embodiment, a rotation axis in a direction substantially perpendicular to the ground surface is referred to as a vertical axis, and a rotation axis in a direction substantially horizontal to the ground surface is referred to as a horizontal axis.

The traveling device 3 is provided on the left and right sides of the lower part of the body 2. The traveling device 3 is a crawler traveling device. A dozer device 7 is attached to the front portion of the traveling device 3. The dozer device 7 can be moved up and down by expanding and contracting the dozer cylinder C1.
The airframe 2 is supported on the traveling device 3 through a swivel bearing 8 so as to be pivotable around a vertical axis (swivel axis) O. The machine body 2 is driven to turn by a turning motor MT. The airframe 2 has a substrate (hereinafter referred to as a swivel substrate) 9 that revolves around the vertical axis O. The swivel board 9 is formed of a steel plate or the like and is connected to a swivel bearing 8 disposed below the swivel board 9. The slewing bearing 8 supports the slewing substrate 9 so as to be pivotable about the vertical axis. A weight (hereinafter referred to as a first weight) 10 for balancing the weight with the work device 4 is attached to the rear portion of the machine body 2.

As shown in FIGS. 39 and 40, the cabin 5 is mounted on the left side of the body 2. The airframe 2 has a support bracket 13 at the front right side in the center of the airframe width direction. A swing bracket 14 is attached to the support bracket 13 so as to be swingable about the vertical axis. The working device 4 is attached to the swing bracket 14.
As shown in FIG. 40, the work device 4 includes a boom 15, an arm 16, and a bucket 17. A base portion (one end side) of the boom 15 is pivotally attached to the swing bracket 14 so as to be rotatable about a horizontal axis, and is supported so as to be swingable up and down. The base portion (one end side) of the arm 16 is pivotally attached to the distal end side (the other end side) of the boom 15 so as to be rotatable about the horizontal axis, and is supported so as to be swingable back and forth. The bucket 17 is provided on the distal end side of the arm 16 so that a squeeze / dump operation is possible. The work machine 1 can be mounted with another work tool (hydraulic attachment) that can be driven by hydraulic pressure instead of or in addition to the bucket 17. Examples of other working tools include a hydraulic breaker, a hydraulic crusher, an angle bloom, an earth auger, a pallet fork, a sweeper, a mower, and a snow blower.

  The swing bracket 14 is swingable about the vertical axis by expansion and contraction of a swing cylinder C2 provided in the body 2. The boom 15 is swingable about a horizontal axis by expansion and contraction of a boom cylinder C3 that connects the boom 15 and the swing bracket 14. The arm 16 is swingable by expansion and contraction of an arm cylinder C4 that connects the arm 16 and the boom 15. The bucket 17 is squeezed and dumped freely by expansion and contraction of a bucket cylinder C5 that connects the bucket 17 and the arm 16.

The hydraulic equipment (the dozer cylinder C1, the swing cylinder C2, the boom cylinder C3, the arm cylinder C4, and the bucket cylinder C5) that drives the working device 4 described above is constituted by a hydraulic cylinder.
The boom 15 and the dozer device 7 can be changed to different specifications.
For example, the boom 15 can be changed to a two-piece specification. The two-piece specification is a specification in which the boom 15 is composed of two members, a front boom and a rear boom, and can be bent at a connecting portion between the front boom and the rear boom. In the case of the two-piece specification, in addition to the boom cylinder C3, a boom cylinder (referred to as a second boom cylinder) for performing an operation of bending the boom 15 at the connecting portion is additionally mounted.

The dozer device 7 can be changed to A / D (angle dozer) specifications. The A / D specification is a specification that enables the angle operation (swing leftward and rightward) of the dozer device 7. In the case of the A / D specification, an angle cylinder for angle operation is additionally mounted separately from the dozer cylinder C1.
As shown in FIG. 39, an engine room E <b> 2 is provided at the rear part of the body 2. In the engine room E2, an engine E1, a radiator 18, an oil cooler 19, a receiver (liquid receiver) 37, a condenser 38, and a compressor 39 are arranged. The engine E1 is provided on the turning board 9 with the crankshaft directed in the body width direction in the engine room E2. The radiator 18 is disposed on the right side of the engine E1 (one side in the body width direction). The oil cooler 19, the receiver (liquid receiver) 37, and the condenser 38 are disposed on the right side of the radiator 18. The condenser 38 cools the refrigerant supplied to the air conditioner unit 70 described later. The compressor 39 is disposed on the left side of the radiator 18 (the other in the body width direction) and above the engine 10. The compressor 39 compresses the refrigerant supplied to the air conditioner unit 70.

  A hydraulic pump 21 is disposed on the left side of the engine E1. The hydraulic pump 21 is driven by the engine E1. The hydraulic pump 21 has a first pump (main pump) and a second pump (pilot pump). The first pump is used to drive the hydraulic equipment and the hydraulic attachment described above. The second pump is mainly used to supply a control signal pressure (pilot pressure).

A cooling fan 79 is provided on the right side of the engine E1. The cooling fan 79 is driven by the engine E1. The cooling fan 79 generates an air flow from right to left.
A tank room TR is provided on the right side of the body 2 (one side in the body width direction). A hydraulic oil tank 22, a fuel tank 23, and a battery 24 are disposed in the tank room TR. The hydraulic oil tank 22 stores hydraulic oil supplied to the hydraulic equipment. The fuel tank 23 is disposed in front of the hydraulic oil tank 22. The fuel tank 23 stores fuel oil to be supplied to the engine E1. The battery 24 is disposed to the right of the front part of the hydraulic oil tank 22 and to the right of the rear part of the fuel tank 23.

  A first control valve 11 is arranged above the fuel tank 23. The first control valve 11 is formed by arranging (integrating) a plurality of control valves for controlling the supply of hydraulic oil to hydraulic equipment. The plurality of control valves are arranged side by side in the horizontal direction. That is, the first control valve 11 is disposed horizontally.

<Cover>
As shown in FIG. 1, the upper part of the body 2 is covered with a cover. The cover includes a first cover 25, a second cover 26, a third cover 27, a fourth cover 28, a fifth cover 29 and a sixth cover 30.

  The first cover 25 covers the rear and upper rear part of the engine room E2. The second cover 26 covers the upper part of the right front part of the engine room E2. Specifically, the second cover 26 is provided in front of the first cover 25 and above the right front portion of the engine E1. The third cover 27 is provided on the right front side of the first cover 26 and covers the upper side of the tank room TR. The fourth cover 28 covers the right side of the tank room TR. The fifth cover 29 is provided between the cabin 5 and the third cover 27, and a space (referred to as a vertical rib space S1) between a first vertical rib 31 and a second vertical rib 32 described later (FIG. 2). (Refer to the upper part of the rear). The sixth cover 30 is provided in front of the fifth cover 29 and covers the upper front part of the vertical rib space S1. The sixth cover (center cover) 30 is provided on one side (left side) of the fuel tank 23 and is fixed to the center frame 49.

  As shown in FIG. 2, the center frame 49 is provided between the cabin 5 and the third cover 27. The upper part of the center frame 49 is covered with a fifth cover 29 and a sixth cover 30. The center frame 49 includes a left frame 49L, a right frame 49R, and an upper frame 49U. The left frame 49L is plate-shaped and is provided with one surface facing right and the other surface facing left. The left frame 49L is fixed to an upper plate 67 on the first vertical rib 31 described later. The right frame 49R is provided to the right of the left frame 49L, and is fixed to a front plate member 68 attached on the upper plate 67. The third cover 27 is attached to the right frame 49R through a hinge (not shown) so as to be opened and closed. The upper frame 49U connects the upper part of the right frame 49R and the upper part of the left frame 49L.

<Board>
As shown in FIGS. 3 and 39, the first vertical rib 31, the second vertical rib 32, and the partition plate 33 are provided on the revolving substrate 9.

The 1st vertical rib 31 and the 2nd vertical rib 32 are provided at intervals in the body width direction. The first vertical rib 31 extends from the front to the rear on the turning substrate 9 on the right side of the vertical axis O at the turning center of the airframe 2. On the left side of the first vertical rib 31, the second vertical rib 32 extends from the front to the rear on the turning substrate 9 through the vertical axis O at the turning center of the machine body 2.
The front end portion of the first vertical rib 31 and the front end portion of the second vertical rib 32 protrude forward from the front end portion of the turning substrate 9. A support bracket 13 is provided between the front end portion of the first vertical rib 31 and the front end portion of the second vertical rib 32. Further, an upper plate 67 is constructed over the upper part of the first vertical rib 31 and the upper part of the second vertical rib 32. The front portion of the upper plate 67 is provided across the front portion of the first vertical rib 31 and the front portion of the second vertical rib 32. The rear portion of the upper plate 67 extends rearward along the upper portion of the second vertical rib 32.

As shown in FIG. 3, the first vertical rib 31 has a notch 31a. The notch 31 a is formed by notching the upper part of the first vertical rib 31 at the right rear portion of the upper plate 67. The first vertical rib 31 is lower in height than the second vertical rib 32 in the notch 31a. The left part of the hydraulic oil tank 22 and the left part of the fuel tank 23 are disposed above the notch 31a.
The second vertical rib 32 has a notch 32a and an opening 32b. The notch 32 a is provided above the vertical axis O at the turning center of the machine body 2, and is formed by notching the lower part of the second vertical rib 32. The opening 32b is provided behind the notch 32a.

As shown in FIG. 39, the partition plate 33 is provided in front of the engine room E2, and extends in the body width direction. A rear end portion of the first vertical rib 31 and a rear end portion of the second vertical rib 32 are connected to the partition plate 33.
As shown in FIGS. 4 and 5, the swivel board 9 is provided with a plurality of mounting holes 9 a for mounting the swivel bearing 8. The slewing bearing 8 is fixed to the lower portion of the slewing substrate 9 by a bolt (not shown) inserted through the mounting hole 9a. The plurality of mounting holes 9 a are arranged in an annular shape around the longitudinal axis O of the turning substrate 9. The broken lines in FIGS. 4 and 5 indicate the position of the outer periphery of the slewing bearing 8.

<First control valve>
As shown in FIG. 6, the first control valve 11 includes a plurality of control valves V <b> 1 to V <b> 13 that control the hydraulic oil supplied to the hydraulic equipment, a pressure oil intake inlet block B <b> 2, and a pressure oil discharge first. The outlet block B1 and the second outlet block B3 are integrated (integrated). The control valves V1 to V13, the inlet block B2, the first outlet block B1, and the second outlet block B3 are arranged side by side in the horizontal direction. The control valves V1 to V13 are arranged in a direction (front-rear direction) orthogonal to the longitudinal direction (spool operation direction). The control valves V1 to V13 are switched in position by receiving a pilot pressure, which will be described later, in the pressure receiving portion.

  In the present embodiment, the control valve V1 is an A / D control valve that controls the angle cylinder. The control valve V2 is a swing control valve that controls the swing cylinder C2. The control valve V3 is a second valve for SP (service port) that controls the hydraulic attachment. The control valve V4 is a turning control valve that controls the turning motor MT. The control valve V5 is a boom control valve that controls the boom cylinder C3. The control valve V6 is a bucket control valve that controls the bucket cylinder C5. The control valve V7 is an arm control valve that controls the arm cylinder C4. The control valve V8 is an SP (service port) first valve that controls the hydraulic attachment. The control valve V9 is a second valve for dozer that controls the dozer cylinder. The control valve V <b> 10 is a traveling right control valve that controls the traveling motor MR of the right traveling device 5. The control valve V11 is a PPS / PLS control valve for PPS (Pressure of Pump Sensing) signal pressure and PLS (Pressure of Load Sensing) signal pressure. The control valve V12 is a travel left control valve that controls the travel motor MR of the travel device 5 on the left side. The control valve V13 is a first dozer control valve that controls the dozer cylinder.

  In this embodiment, in order from the front, the first outlet block B1, the A / D control valve V1, the swing control valve V2, the SP second control valve V3, the turning control valve V4, the boom control valve V5, and the bucket Control valve V6, arm control valve V7, SP first control valve V8, dozer second control valve V9, travel right control valve V10, inlet block B2, PPS / PLS control valve V11, travel left control valve V12 The first control valve V13 for dozer and the second outlet block B3 are arranged in this order. However, the arrangement order of the valves constituting the first control valve 11 is not limited to the arrangement order of the present embodiment.

  The number and type of valves constituting the first control valve 11 can be changed according to the specifications of the work machine 1. The A / D control valve V1 that controls the angle cylinder is a valve used in the case of the A / D specification. In the case of the two-piece specification, a two-piece control valve is used. That is, the number of valve stations (number of sections) is determined according to the specifications of the work implement. Therefore, depending on the specifications of the work implement, there are control valves that are not mounted, and the number of control valves constituting the first control valve 11 (the number of sections) may be reduced. Depending on the specifications of the work implement, the number of control valves constituting the first control valve 11 may increase.

As shown in FIG. 4, the first control valve 11 is supported by the support plate 34 at a position above the fuel tank 23. The front portion of the first control valve 11 is located above the fuel tank 23. The rear part of the first control valve 11 is located above an extension part 22 b (described later) of the hydraulic oil tank 22.
As shown in FIG. 3, the support plate 34 is supported at a position above the fuel tank 23 by the front bracket 35 and the rear bracket 36. The support plate 34 is a substantially rectangular flat plate in plan view, and supports the lower surface of the first control valve 11. The support plate 34 is arranged with the long side facing the front-rear direction and the short side facing the body width direction. The support plate 34 and the first control valve 11 are fixed by bolts.

  The front bracket 35 is disposed on one side (front side) of the control valves V1 to V13 in the parallel direction from the longitudinal center of the support plate 34. The front bracket 35 has an end on the inboard side (left side) protruding from the left edge of the support plate 34, and an end on the outer side (right side) of the body is located below the support plate 34. The end of the front bracket 35 on the inboard side is located above the right part of the upper plate 67 and is connected to the upper plate 67 by a bolt BL1.

  The rear bracket 36 is disposed on the other side (rear side) in the parallel direction of the control valves V <b> 1 to V <b> 13 with respect to the longitudinal center of the support plate 34. That is, the front bracket 35 and the rear bracket 36 are separated from each other in the parallel direction (front-rear direction) of the control valves V1 to V13. The rear bracket 36 has an end on the outer side (right side) of the airframe protruding from the right edge of the support plate 34, and an end on the inner side (left side) of the airframe protrudes from the left edge of the support plate 34. The end of the rear bracket 36 on the outer side of the machine body is connected to a support base 69 provided above the battery 24 by a bolt BL2. The end of the rear bracket 36 on the inward side of the body is connected to the upper end of a support column 99 erected on the turning substrate 9 by a bolt BL3.

<Switching valve>
As shown in FIGS. 6 to 9, a switching valve 80 connected to the control valve constituting the first control valve 11 is disposed above the first control valve 11. The switching valve 80 is a three-way switching valve. The switching valve 80 has an inlet port 81, a first outlet port 82, a second outlet port 83, and an operation handle 84. The switching valve 80 can switch the destination of the hydraulic oil introduced from the inlet port 81 to the first outlet port 82 or the second outlet port 83 by switching the operation handle 84.

A return oil passage 85 is connected to the inlet port 81. A first oil passage 86 is connected to the first outlet port 82. A second oil passage 87 is connected to the second outlet port 83. As a result, the switching valve 80 can switch the connection destination of the return oil passage 85 to one of the first oil passage 86 and the second oil passage 87.
The return oil path 85 is an oil path for returning the hydraulic oil from the hydraulic equipment to the hydraulic oil tank 22, and includes a connector 85A, a pipe joint 85B, and a hydraulic hose 85C. The connection tool 85A is connected to the inlet port 81 of the switching valve 80. The pipe joint 85B connects the connection tool 85A and the hydraulic hose 85C. The hydraulic hose 85C connects the pipe joint 85B and the hydraulic device.

  The first oil passage 86 is composed of a pipe material (first pipe material). The first pipe member includes a first connection member 86A, a connection pipe 86B, and a pipe joint 86C. The central axis of the pipe joint 86C and the connecting pipe 86B is arranged in the vertical direction. The first connection member 86 </ b> A is connected to the first outlet port 82 of the switching valve 80. One end (upper end) of the pipe joint 86C is connected to the lower part of the first connection member 86A, and the other end (lower end) is connected to one end (upper end) of the connection pipe 86B. One end (upper end) of the connection pipe 86B is connected to the other end (lower end) of the pipe joint 86C, and the other end (lower end) is connected to the inlet port at the upper part of the control valve V8. The first connecting member 86A, the connecting pipe 86B, and the pipe joint 86C are made of a rigid material such as metal. The pipe joint 86C incorporates an O-ring, and the effect of preventing loosening is enhanced.

  The second oil passage 87 has a hydraulic hose 87A and a second connection member 87B. In the present embodiment, the hydraulic hose 87A is formed from a flexible material such as rubber. One end of the hydraulic hose 87 </ b> A is connected to the second outlet port 83 of the switching valve 80. The second connecting member 87B is provided in an oil passage that returns from the outlet port of the control valve V5 to the hydraulic oil tank 22. The other end of the hydraulic hose 87A is connected to the second connection member 87B.

  As shown in FIG. 8, the second connection member 87B and the outlet port of the control valve V5 are connected by a first pipe 88, a pipe joint 89, a second pipe 90, and a connection tool 91. The first pipe 88 has one end connected to the outlet port of the control valve V <b> 5 and the other end connected to the pipe joint 89. The pipe joint 89 connects the other end of the first pipe 88 and the connector 91. The second tube 90 has one end connected to the connection tool 91 and the other end connected to the second connection member 87B.

  A hydraulic hose 93 is connected to the second connecting member 87B via a pipe joint 92. The hydraulic hose 93 is connected to the hydraulic oil tank 22. When the switching valve 80 connects the return oil path 85 and the second oil path 87, the hydraulic oil that has passed through the return oil path 85 enters the hydraulic hose 93 through the second oil path 87, and the hydraulic oil Returned to the tank 22. When the switching valve 80 connects the return oil passage 85 and the first oil passage 86, the hydraulic oil that has passed through the return oil passage 85 enters the inlet port of the control valve V8.

  The switching valve 80 is supported at a position above the first control valve 11 by the first pipe material that forms the first oil passage 86. Since the first pipe material (the first connecting member 86A, the connecting pipe 86B, and the pipe joint 86C) forming the first oil passage 86 is formed of a rigid material, a switching valve is not required without requiring a special support member. 80 can be supported at a position above the control valve constituting the first control valve 11 (in this embodiment, above the control valve V8).

  Note that the second outlet port 83 and the second connection member 87B may be connected by a pipe member formed of a rigid material such as metal, instead of the connection by the flexible hydraulic hose 87A. That is, the second oil passage 87 may be a tube formed from a rigid material. In this case, the switching valve 80 can be supported above the first control valve 11 by both the pipe and the first pipe forming the first oil passage 86.

As shown in FIG. 9, the switching valve 80 is disposed such that the rotation shaft 84a of the operation handle 84 faces the vertical direction (vertical direction).
When the switching valve 80 is arranged so that the rotary shaft 84 faces in the horizontal direction, it is necessary to set the switching force (force required for switching) to be large in order to prevent the switching valve 80 from switching due to the weight of the operation handle 84. is there. Therefore, the force required when the operator performs a switching operation increases.

On the other hand, in the present embodiment, the switching valve 80 is arranged so that the rotation shaft 84a of the operation handle 84 faces in the vertical direction, and therefore the switching valve 80 is not switched by the weight of the operation handle 84. Therefore, it is not necessary to set a large switching force of the switching valve 80, so that the operator can easily perform the switching operation.
In the present embodiment, the upper portion of the switching valve 80 is covered with the third cover 27 (upper cover). In this case, the operation handle 84 and the third cover 27 may interfere with each other if the operation handle 84 is disposed so that the rotation shaft 84a faces the horizontal direction. Therefore, in order to prevent this interference, the handle must be formed short, and the force required for the handle operation increases.

  On the other hand, in the case of this embodiment, the switching valve 80 is arranged so that the rotation shaft 84a of the operation handle 84 faces in the vertical direction, so that the operation handle 84 is prevented from interfering with the third cover 27. On the other hand, the handle length can be increased to reduce the force required for handle operation.

<Arrangement of oiling switches, etc.>
As shown in FIGS. 10 and 11, a fuel supply portion 48 is provided in front of the upper surface of the fuel tank 23 and in front of the first control valve 11. The fuel supply section 48 has an opening for supplying fuel to the fuel tank 23 using a fuel supply apparatus, and the opening is closed by a removable cap 50. A cylindrical body 58 protrudes to the left of the oil filler 48 and in front of the first control valve 11. The cylinder 58 communicates with the inside of the fuel tank 23. A fuel sensor 53 is attached to the cylinder 58. A fuel gauge 54 is provided in front of the fuel sensor 53. The fuel sensor 53 and the fuel gauge 54 are disposed between the fuel supply portion 48 and a hose connection portion 52 described later. A fuel return portion 56 is provided in front of the upper surface of the fuel tank 23 and to the right of the fuel supply portion 48. A return pipe 57 for returning the fuel overflowed from the injection pump that injects fuel into the combustion chamber of the engine E1 to the fuel tank 23 is connected to the fuel return portion 56.

  As shown in FIG. 10, an oil supply pump 40 is provided on one side (left side) of the fuel tank 23. The oil supply pump 40 is used to supply fuel to the fuel tank 23 from a fuel storage container such as a drum can. The oil supply pump 40 is attached to the first bracket 41. The first bracket 41 has a first plate 41a and a second plate 41b. The first plate 41 a extends in the front-rear direction, and the other surface (left surface) in the body width direction is attached to one surface (right surface) in the body width direction of the left frame 49 </ b> L of the center frame 49. An oil supply pump 40 is attached to one surface (right surface) of the first plate 41a in the body width direction. The second plate 41b is located in front of the first plate 41a and extends in the body width direction. The other end (left end) of the second plate 41b in the machine width direction is attached to the one side (right side) of the left frame 49L in the machine width direction. The first plate 41a and the second plate 41b are integrally formed.

  A fuel supply switch 42 is provided at a first position above the fuel tank 23. The first position is a position above the fuel tank 23 and near the outer edge of the airframe 2 in the horizontal direction. In the case of the present embodiment, the first position is above the fuel tank 23, and is outside the vehicle body width direction (right side) and forward of the first control valve 11. The oil supply switch 42 is a switch for switching the oil supply pump 40 between an operating state and a stopped state. The oil supply switch 42 has an operation push button 42a and a stop push button 42b. The oil supply switch 42 is attached to the second bracket 46.

  As shown in FIGS. 11, 12, and 7, the second bracket 46 includes a first plate 46a, a second plate 46b, and a third plate 46c. The first plate 46a extends in the body width direction, and is disposed with one surface facing forward (the oil supply portion 48 side) and the other surface facing rear (the first control valve 11 side). The first plate 46 a is attached to the right portion of the attachment plate 47 fixed to the front end portion of the support plate 34 with a bolt and extends rightward from the attachment plate 47. The first plate 46a has a shape in which two corners on a rectangular diagonal line are cut out, and includes a first cutout portion 46d and a second cutout portion 46e. The first cutout 46d is provided in the upper left part of the first plate 46a (the upper part on the other side in the body width direction). The second notch 46e is provided at the lower right portion (lower portion on one side in the body width direction) of the first plate 46a. The first notch 46 d is provided to prevent interference between the piping such as the blazer pipe 59 and the second bracket 46. The second notch 46e is provided to prevent interference between piping such as the return pipe 57 and the second bracket 46.

The second plate 46b is bent backward from the upper end of the first plate 46a. More specifically, the second plate 46b is bent rearward from the right side (one side in the body width direction) of the first notch 46d. The second plate 46b is disposed with one surface facing upward and the other surface facing downward.
The third plate 46c is a right end portion (one end portion in the body width direction) of the first plate 46a and is bent backward from above the second notch portion 46e of the first plate 46a. The third plate 46c is arranged with one surface facing right (outside the aircraft) and the other surface facing left (inside the aircraft). An operation push button 42a and a stop push button 42b are attached to the third plate 46c. The operation push button 42a and the stop push button 42b are arranged with the operation surface directed to the right (outside the machine body).

  The third plate 46c has a third notch 46f and a fourth notch 46g. The third notch 46f is provided at the upper rear corner of the third plate 46c. The fourth notch 46g is provided at the corner of the rear lower part of the third plate 46c. By providing the third cutout portion 46f and the fourth cutout portion 46g, the hose 44 described later can be prevented from coming into contact with the corners of the second bracket 46. The upper end of the third plate 46c is connected (welded) to the right end of the second plate 46b. Thereby, the strength (rigidity) of the second bracket 46 is increased. Further, the upper and front sides of the wiring connected to the fuel supply switch 42 are protected by the second plate 46b and the third plate 46c.

  At a position different from the upper side of the fuel tank 23 (referred to as a second position), a control device 43 for the fuel pump 21 different from the fuel switch 42 is provided. In the present embodiment, the control device 43 is provided on one side (left side) of the fuel tank 23, but is provided in another position different from the upper side of the fuel tank 23 (for example, behind the fuel tank 23). May be. In the present embodiment, the control device 43 is a relay for driving the fuel pump 21 (hereinafter referred to as the relay 43), but may be a control device for the fuel pump 21 different from the relay 43.

  As shown in FIG. 10, the relay 43 is attached to the front surface of the second plate 41 b of the first bracket 41. That is, the oil supply pump 40 and the relay 43 are both attached to the first bracket 41. In other words, the first bracket 41 serves as both a bracket for attaching the oil supply pump 40 and a bracket for attaching the relay 43. The relay 43 is located in front of the oil supply pump 40 and on one side (left side) of the front portion of the first control valve 11. Thereby, since the relay 43 is located in the front part of the airframe 2, the maintenance of the relay 43 becomes easy. However, the position of the relay 43 is not limited to the front part of the airframe 2, and may be another position (such as the rear part of the airframe 2). The upper portion of the relay 43 is covered with a sixth cover (center cover) 30. Thereby, the relay 43 can be protected from rain, earth and sand, etc., without providing a special cover for protecting the relay 43.

  As described above, in the present embodiment, among the control devices of the fuel pump 21, the fuel switch 42 is provided at the first position above the fuel tank 23, and the control device (relay) 43 different from the fuel switch 42 is provided as the fuel tank. 23 is provided at a second position different from above 23. Thereby, the space which the control apparatus of the fuel pump 21 occupies above the fuel tank 23 can be made small. Therefore, the first control valve 11 can be extended (lengthened), and the number of stations (number of sections) of the first control valve 11 can be easily increased in accordance with the specification change of the work machine 1 or the like. .

  Further, since the refueling switch 42 that is frequently accessed by the worker is disposed above the fuel tank 23 and on the outer side (right side) of the first control valve 11 in the body width direction, the refueling switch 42 Can be easily accessed, and the lubrication workability is improved. On the other hand, control devices (such as the relay 43) other than the fuel supply switch 42 have a low frequency of access by the operator, so that there is almost no inconvenience even if they are arranged on one side (left side) of the fuel tank 23. That is, in this embodiment, focusing on the frequency with which the operator accesses the control device of the oil supply pump 21, the arrangement of the oil supply switch 42 and the control device (relay, etc.) 43 other than the oil supply switch 42 is set. Yes.

  Moreover, since the 1st bracket 41 serves as the bracket for attaching the oil supply pump 40, and the bracket for attaching the relay 43, the oil supply switch 42 and the control apparatus (relay) 43 are set in different positions (first). The increase in the number of parts due to the arrangement at the first position and the second position can be prevented. In addition, since the oil supply pump 40 and the control device 43 are arranged at positions close to each other, the wiring (electric wire) connecting the oil supply pump 40 and the control device 43 can be shortened.

As shown in FIGS. 11 and 12, a blazer pipe 59 is fixed to the second bracket 46. One end of the blazer pipe 59 is connected to a side portion of the cylindrical body 58. As a result, one end of the blazer pipe 59 communicates with the inside of the fuel tank 23.
The blazer pipe 59 has a first portion 59a, a second portion 59b, a third portion 59c, a fourth portion 59d, and a fifth portion 59e. The first portion 59a extends rightward from the side portion of the cylindrical body 58. The second portion 59b is bent from the right end of the first portion 59a and extends upward. The third portion 59c is bent from the upper end of the second portion 59b and extends backward. The fourth portion 59d is bent from the rear end of the third portion 59c and extends downward. The fifth portion 59e is bent from the lower end of the fourth portion 59d and extends rearward and downward.

  The fourth portion 59d is fixed to the edge extending in the vertical direction of the first cutout portion 46d of the second bracket 46 by welding. Thereby, the 2nd bracket 46 and the blazer pipe 59 are integrated. Thus, the bracket for attaching the blazer pipe 59 becomes unnecessary by integrating the blazer pipe 59 with the second bracket 46 to which the fuel supply switch 42 is attached. Therefore, the space required for installing the blazer pipe 59 is reduced, and the number of parts can be reduced.

  As shown in FIG. 10, one end 44 a of the hose 44 is connected to the suction part 40 a of the fuel pump 40. The hose 44 extends from the suction portion 40a toward the fuel tank 23 (right side), then curves and extends forward, curves along the upper front surface of the fuel tank 23, extends rearward, and then extends downward. . As shown in FIG. 11, the midway part of the hose 44 is held by a clamp 55. The clamp 55 is a leaf spring fixed to the upper surface of the fuel tank 23 and presses the hose 44 against the front surface of the fuel tank 23. As shown in FIG. 10, the other end 44 b of the hose 44 is stored in the storage unit 45. The storage portion 45 has a cylindrical shape, is provided on the other side (right side) of the fuel tank 23, and is fixed to a surface (right side) on the other side of the fuel tank 23. The storage portion 45 is located to the right of the front portion of the first control valve 11. Therefore, the oil supply switch 42 provided in front of the first control valve 11 is located in the vicinity of the storage portion 45.

As shown in FIG. 10, one end of a hose 51 is connected to the discharge part 40 b of the oil supply pump 40. As shown in FIG. 11, the other end portion of the hose 51 is connected to a hose connection portion 52 provided at the front portion of the upper surface of the fuel tank 23. The hose connection part 52 is provided in front of the first control valve 11.
When fuel is supplied from the fuel storage container to the fuel tank 23, the other end side 44b of the hose 44 is taken out from the storage part 45 and connected to the fuel storage container, and the operation push button 42a is pressed to turn on the fuel supply switch 42. Switch to. As a result, the fuel pump 40 is activated, and the fuel in the fuel storage container is supplied from the hose connection portion 52 into the fuel tank 23 through the hose 44 and the hose 45. During the replenishment operation, the oil supply switch 42 is positioned in the vicinity of the storage unit 45, so that the operator can easily recognize the oil supply switch 42 when taking out the hose 44 from the storage unit 45.

<Second control valve>
As shown in FIGS. 13 to 15, the hydraulic oil tank 22 has a main body portion 22 a and an extension portion 22 b and is formed in an L shape in a side view. The main body 22a has a rectangular parallelepiped shape that is long in the vertical direction. The extension part 22b extends forward from the front lower part of the main body part 22a.

  A bracket 60 is fixed to the surface (left surface) of the main body portion 22a of the hydraulic oil tank 22 on the in-body side. The bracket 60 is an L-shaped metal plate in plan view, and includes a first plate 60a and a second plate 60b. The first plate 60a is fixed to the surface of the main body portion 22a on the inward side of the body by welding or the like. The second plate 60b is bent from the rear end portion of the first plate 60a toward the body side. The second plate 60b has one surface facing the front and the other surface facing the rear.

The second control valve 12 is attached to the front surface of the second plate 60b by bolts (not shown). That is, the second control valve 12 is attached to the surface of the main body 22 a of the hydraulic oil tank 22 on the inward side of the body through the bracket 60.
The second control valve 12 is configured by integrating (integrating) a plurality of valves that control the supply of hydraulic oil to the first control valve 11 into one body. As a result, the number of parts can be reduced because only one bracket is required for attaching the plurality of valves to the hydraulic oil tank 22. In the present embodiment, the second control valve 12 is configured by integrating (integrating) four valves. These four valves are proportional electromagnetic valves. Hereinafter, the four valves constituting the second control valve 12 are referred to as a first proportional valve 12A, a second proportional valve 12B, a third proportional valve 12C, and a fourth proportional valve 12D, respectively.

  The first proportional valve 12 </ b> A is connected to one side of the pressure receiving portion of the SP first control valve V <b> 2 via the first hydraulic hose 61. The second proportional valve 12B is connected to the other side of the pressure receiving portion of the SP first control valve V2 via the second hydraulic hose 62. The third proportional valve 12C is connected to one side of the pressure receiving portion of the SP second control valve V8 via the third hydraulic hose 63. The fourth proportional valve 12D is connected to the other side of the pressure receiving portion of the SP second control valve V8 via the fourth hydraulic hose 64.

  The first SP control valve V2 controls the flow rate of hydraulic oil supplied to the hydraulic actuator based on the pilot oil pressure (pilot pressure) supplied from the first proportional valve 12A or the second proportional valve 12B. The second SP control valve V8 controls the flow rate of the hydraulic oil supplied to the hydraulic actuator based on the pilot pressure supplied from the third proportional valve 12C or the fourth proportional valve 12D.

  As shown in FIGS. 13 and 15, the plurality of valves (the first proportional valve 12A, the second proportional valve 12B, the third proportional valve 12C, and the fourth proportional valve 12D) constituting the second control valve 12 are arranged in the vertical direction. They are arranged side by side (vertical direction). As shown in FIG. 13, the first proportional valve 12 </ b> A has a connection portion (hereinafter referred to as a first connection portion) 12 </ b> Aa for connecting the first hydraulic hose 61. The second proportional valve 12B has a connection portion (hereinafter referred to as a second connection portion) 12Ba for connecting the second hydraulic hose 62. The third proportional valve 12C has a connection portion (hereinafter referred to as a third connection portion) 12Ca for connecting the third hydraulic hose 63. The fourth proportional valve 12D has a connection portion (hereinafter referred to as a fourth connection portion) 12Da for connecting the fourth hydraulic hose 64. The first connection portion 12Aa, the second connection portion 12Ba, the third connection portion 12Ca, and the fourth connection portion 12Da are provided side by side in the vertical direction on the side (left side) opposite to the hydraulic oil tank 22.

  As shown in FIG. 15, connecting pipes are connected to the first connecting portion 12Aa, the second connecting portion 12Ba, the third connecting portion 12Ca, and the fourth connecting portion 12Da, respectively. Hereinafter, the connection pipe connected to the first connection part 12Aa is the first connection pipe 71, the connection pipe connected to the second connection part 12Ba is the second connection pipe 72, and the connection pipe connected to the third connection part 12Ca is the connection pipe. The connection pipe connected to the third connection pipe 73 and the fourth connection portion 12Da is referred to as a fourth connection pipe 74. Each connecting pipe forms an L-shaped pipe line in plan view, and one end side faces the outer side of the fuselage (the hydraulic oil tank 22 side), and the other end side faces the front.

  One end side of the first connection pipe 71 is connected to the first connection portion 12Aa, and the first hydraulic hose 61 is connected to the other end side. One end side of the second connection pipe 72 is connected to the second connection portion 12Ba, and the second hydraulic hose 62 is connected to the other end side. One end side of the third connecting pipe 73 is connected to the third connecting portion 12Ca, and the third hydraulic hose 63 is connected to the other end side. One end side of the fourth connection pipe 74 is connected to the fourth connection portion 12Da, and the fourth hydraulic hose 64 is connected to the other end side.

  The first hydraulic hose 61 extends forward from the other end side of the first connection pipe 71 and is connected to one side of the pressure receiving portion of the SP first control valve V2. The second hydraulic hose 62 extends forward from the other end side of the second connection pipe 72 and is connected to the other side of the pressure receiving portion of the SP first control valve V2. The third hydraulic hose 63 extends forward from the other end side of the third connection pipe 73 and is connected to one side of the pressure receiving portion of the SP second control valve V8. The fourth hydraulic hose 64 extends forward from the other end side of the fourth connection pipe 74 and is connected to the other side of the pressure receiving portion of the SP second control valve V8.

  As described above, the second control valve 12 has a plurality of hydraulic hose connection parts (first connection part 12Aa, second connection part 12Ba, third connection part 12Ca, fourth connection) on the side opposite to the hydraulic oil tank 22. Part 12Da), and the connection part is provided side by side in the vertical direction. Therefore, the hydraulic hoses connected to the respective connecting portions can be extended substantially linearly in the same direction (forward) without interfering with each other. Thereby, the space which a hydraulic hose occupies becomes small, and it becomes possible to ensure the space for arrange | positioning a hydraulic hose reliably.

  Two hose connection portions are provided on the upper portion of the second control valve 12. One hose connection part (hereinafter referred to as the fifth connection part) 12 a is connected to the second pump of the hydraulic pump 21 via the hydraulic hose 65. The other hose connection part (hereinafter referred to as a sixth connection part) 12 b is connected to the hydraulic oil tank 22 via a hydraulic hose 66. That is, the fifth connection portion 12a is a pump port, and the sixth connection portion 12b is a tank port.

  As described above, in the second control valve 12, the pump port and the tank port of the plurality of valves (the first proportional valve 12A, the second proportional valve 12B, the third proportional valve 12C, and the fourth proportional valve 12D) are shared. ing. In other words, the pump port (fifth connection portion) 12a also serves as the pump ports of a plurality of valves constituting the second control valve 12. The tank port (sixth connection portion) 12 b also serves as a tank port for a plurality of valves constituting the second control valve 12. Therefore, the second control valve 12 can be reduced in size, and the number of hydraulic hoses connected to the second connection valve 12 can be reduced. Thereby, the assembly | attachment property of the hydraulic hose with respect to the 2nd connection valve 12 is improved.

<Heater hose>
As shown in FIG. 16, a step 20 for supporting the driver's seat 6 from below is provided above the turning board 9. Step 20 is arranged with a space between the revolving substrate 9. As shown in FIG. 17, a support base 75 is fixed to the upper surface of step 20, and the driver's seat 6 is supported on the support base 75. An air conditioner unit 70 is disposed above the step 20 and below the driver's seat 6. The air conditioner unit 70 constitutes an air conditioner that adjusts the temperature inside the cabin 5 together with the receiver 37, the condenser 38, and the compressor 39.

As shown in FIG. 16, a heater hose 76 is disposed below step 20. The heater hose 76 connects the engine (first device) E1 and the air conditioner unit (second device) 70.
As shown in FIGS. 5 and 19, the heater hose 76 has a first hose 761 and a second hose 762. The first hose 761 and the second hose 762 pass between the step 20 and the turning substrate 9.

  As shown in FIG. 19, the first hose 761 includes a first feed hose 761A and a first return hose 761B. The second hose 762 includes a second feed hose 762A and a second return hose 762B. The first hose 761 (the first feed hose 761A and the first return hose 761B) has one end connected to the engine E1 and the other end connected to the first connector 77. The second hose 762 (second feed hose 762A and second return hose 762B) has one end connected to the air conditioner unit 70 and the other end connected to the first connector 77. That is, the first hose 761 and the second hose 762 are connected by the first connector 77.

  As shown in FIG. 5, the first hose 761 is guided through the opening 32 b of the second vertical rib 32 from the engine room E <b> 2 where the engine E <b> 1 is disposed below the step 20. As shown in FIG. 16, the second hose 762 is guided from below the step 20 where the air conditioner unit 70 is disposed to below the step 20 through the opening 20 a provided at the right rear portion of the step 20. .

  As shown in FIG. 19, the first connector 77 includes a feed connection portion 77A that can connect a feed hose and pass hydraulic oil, and a feed connection portion 77B that can connect a return hose and pass hydraulic fluid. And have. The feed connecting portion 77A and the feed connecting portion 77B are made of a pipe material (pipe). The feed connecting portion 77A and the return connecting portion 77B are bent in a substantially U shape and arranged side by side. The feed connecting portion 77A includes a first portion 771A extending in the up-down direction, a second portion 772A extending substantially perpendicularly from the upper end portion of the first portion 771A, and a second portion 772A extending from the lower end portion of the first portion 771A. And a third portion 773A extending. The return connecting portion 77B includes a first portion 771B extending in the vertical direction, a second portion 772B extending in a substantially perpendicular direction from the upper end portion of the first portion 771B, and parallel to the second portion 772B from the lower end portion of the first portion 771B. And a third portion 773B extending.

  The other end of the second feed hose 762A is connected to the second portion 772A of the feed connecting portion 77A. The other end of the first feed hose 761A is connected to the third portion 773A of the feed connecting portion 77A. The other end portion of the second return hose 762B is connected to the second portion 772B of the return connection portion 77B. The other end portion of the first return hose 761B is connected to the third portion 773B of the return connection portion 77B. Accordingly, the first connector 77 connects the first hose 761 and the second hose 762 in the vertical direction. In other words, the first connection tool 77 has a connection portion that connects the first hose 761 and the second hose 762 disposed below the first hose 761.

  The warm water heated by the water jacket of the engine E1 is sent from the first feed hose 761A to the heat exchanger of the air conditioner unit 70 through the feed connection portion 77A and the second feed hose 762A, and the air warmed by the warm water is It is supplied into the cabin 5. The hot water sent to the heat exchanger of the air conditioner unit 70 is returned to the water jacket of the engine E1 from the second return hose 762B through the return connecting portion 77B and the first return hose 761B in a state where the temperature is lowered.

  The first connector 77 is supported on the turning substrate 9 by a bracket 78 below the step 20. The bracket 78 is fixed on the swivel board 9 below the step 20. The bracket 78 has a substrate part 78a, a vertical plate part 78b, and a fixing part 78c. The board portion 78a is fixed on the swivel board 9 by inserting bolts into the mounting holes 78d and screwing them into screw holes provided in the swivel board 9. The vertical plate portion 78b is bent from the edge of the substrate portion 78a and extends upward. The vertical plate portion 78b is disposed with one surface facing right and rearward (right diagonally rearward), and the other surface facing leftward and frontward (left diagonally forward). The fixing portion 78c is provided on one surface of the vertical plate portion 78b, and has two projecting pieces 781c and 782c protruding in a direction away from the one surface. One protruding piece 781c is connected (welded) to the first portion 771A of the feed connecting portion 77A. The other protruding piece 782c is connected (welded) to the first portion 771B of the return connecting portion 77B.

  As shown in FIGS. 4 and 5, the first connector 77 and the bracket 78 are located at the one end 9 b side in the width direction of the swivel board 9 and away from the vertical axis (swivel axis) O serving as the pivot center. Is arranged. Specifically, the first connector 77 and the bracket 78 are provided on the one end 9b side from the intermediate point M between the vertical axis O and the one end 9b in the direction perpendicular to the vertical axis O of the turning substrate 9. Yes. In the present embodiment, one end of the swivel board 9 in the direction perpendicular to the vertical axis O is one end 9b in the width direction of the swivel board 9 (the same as the machine body width direction). Further, in the present embodiment, the one end portion 9 b in the width direction of the turning substrate 9 is the left end portion of the turning substrate 9. Further, the first connector 77 and the bracket 78 are provided on the turning substrate 9 on the outer side in the direction perpendicular to the vertical axis O from the outer periphery of the turning bearing 8 (indicated by a broken line in FIGS. 4 and 5). More specifically, the first connector 77 and the bracket 78 are provided in a range that the operator can reach from the other side (left side) of the machine body 2 by inserting his hand under the step 20.

  Thereby, the connection work of the 1st hose 761 connected to engine E1 and the 2nd hose 762 connected to air-conditioner unit 70 becomes easy. Specifically, the operation of connecting the first hose 761 and the second hose 762 via the first connector 77 does not require the operator to put the upper body deeply under the step 20, and the machine body 2. This can be done by inserting a hand under the step 20 from the other side (left side).

<Air conditioning hose>
As shown in FIG. 16, an air conditioner hose 94 is disposed below step 20. The air conditioner hose 94 connects an air conditioner unit (second device) 70 to a receiver 37 and a compressor 39 (collectively referred to as a third device).

As shown in FIG. 5, the air conditioner hose 94 includes a third hose 941 and a fourth hose 942. The third hose 941 and the fourth hose 942 pass between the step 20 and the turning substrate 9.
The third hose 941 has a hose 941A and a hose 941B. Of the third hose 941, one hose 941 </ b> A has one end connected to the compressor 39 and the other end connected to the second connector 95. The other hose 941 </ b> B has one end connected to the receiver 37 and the other end connected to the second connector 95. The fourth hose 942 has a hose 942A and a hose 942B. The fourth hose 942 (the hoses 942A and 942B) has one end connected to the air conditioner unit 70 and the other end connected to the second connector 95. That is, the third hose 941 and the fourth hose 942 are connected by the second connector 95. Further, since the second connection tool 95 and the first connection tool 77 are arranged in the vicinity, the connection work in the second connection tool 95 and the connection work in the first connection tool 77 are easily performed.

  As shown in FIG. 5, the third hose 941 passes through the notch 32 a of the second vertical rib 32 and is guided below the step 20 from the engine room E <b> 2 where the compressor 39 and the receiver 37 are disposed. As shown in FIG. 16, the fourth hose 942 is led from below the step 20 where the air conditioner unit 70 is disposed to the lower part of the step 20 through the opening 20 a provided at the right rear part of the step 20. .

  The second connector 95 has two hose joints 95A and 95B. One hose joint 95A connects the hose 941A and the hose 942A. The other hose joint 95B connects the hose 941B and the hose 942B. The two hose joints 95A and 95B connect the third hose 941 (hose 941A and hose 941B) and the fourth hose 942 (hose 942A and 942B) in the front-rear direction. In other words, the second connector 95 has a connecting portion that connects the third hose 763 and the fourth hose 764 disposed in a substantially horizontal direction with respect to the third hose 763.

  The second connector 95 (hose joints 95 </ b> A and 95 </ b> B) is disposed on the one end portion 9 b side in the width direction of the turning substrate 9 and at a position away from the vertical axis (turning axis) O. Specifically, the second connector 95 is closer to the one end portion 9b than the intermediate point M between the vertical axis O and one end portion in the width direction of the revolving substrate 9 (the other end portion in the body width direction) 9b. Is provided. The second connector 95 is provided on the turning substrate 9 outside the outer periphery of the turning bearing 8. More specifically, the second connector 95 is provided in a range that the operator can reach from the other side (left side) of the machine body 2 by inserting his hand under the step 20.

  Thereby, the connection work of the 3rd hose 941 respectively connected to the receiver 37 and the compressor 39 (3rd apparatus) and the 4th hose 942 connected to the air-conditioner unit 70 becomes easy. Specifically, the operation of connecting the third hose 941 and the fourth hose 942 via the second connector 95 does not require the operator to put the upper body deeply below the step 20, and the machine body 2. This can be done by inserting a hand under the step 20 from the other side (left side).

  Here, the first connector 77 is fixed on the swivel board 9 via the bracket 78, but the second connector 95 is not fixed on the swivel board 9. Therefore, in order to maintain the second connector 95 at a position away from the vertical axis O, it is necessary to restrict the movement of the second connector 95. In the present embodiment, a plurality of hose guides are provided to restrict the movement of the second connector 95.

As shown in FIGS. 4 and 5, the hose guide has a first hose guide 96 and a second hose guide 97.
The first hose guide 96 is disposed on the vertical axis O side (between the intermediate point M and the vertical axis O) from the intermediate point M. Specifically, the first hose guide 96 is disposed on the inner side in the direction perpendicular to the vertical axis O than the outer periphery of the slewing bearing 8 and in front of the vertical axis O. The first hose guide 96 is formed in a straight line, and its lower end is fixed on the turning substrate 9 and extends upward.

  The second hose guide 97 is disposed closer to the one end 9 b than the intermediate point M. Specifically, the second hose guide 97 is disposed outside the outer periphery of the slewing bearing 8 in the direction perpendicular to the vertical axis O and ahead of the vertical axis O. The second hose guide 97 has a first portion 97a and a second portion 97b. The first portion 97a has a lower end fixed on the turning substrate 9 and extends upward. The second portion 97b is bent at a substantially right angle from the upper end portion of the first portion 97a and extends rearward.

  The first hose guide 96 and the second hose guide 97 guide the third hose 941. The third hose 941 (the hose 941A and the hose 941B) is guided from the engine room E2 to the lower side of the step 20 through the notch 32a of the second vertical rib 32, and is guided by the first hose guide 96 and the second hose guide 97. Has been. Specifically, the third hose 941 is guided to extend toward the one end portion 9b while being restricted from moving forward by contacting the first hose guide 96, and further contacts the second hose guide 97. In this way, it is guided so as to extend toward the one end 9b while being restricted from moving forward and upward.

  As described above, the third hose 941 is guided while being regulated by the first hose guide 96 and the second hose guide 97, so that the movement of the second connector 95 connected to the third hose 941 is regulated. . The movement of the second connector 95 is also restricted by the second connector 95 being provided closer to the one end 9 b than the bracket 78 that supports the first connector 77. Thereby, the 2nd connection tool 95 is maintained in the position away from the vertical axis | shaft O. FIG.

  In the present embodiment, two hose guides (first hose guide 96 and second hose guide 97) are provided as a plurality of hose guides for guiding the third hose 941, but three or more hose guides are provided. It may be provided. Further, the plurality of hose guides may include different shapes as in this embodiment, or may all have the same shape.

<Driver seat area>
As shown in FIGS. 17 and 18, operation levers 101 </ b> L and 101 </ b> R are provided on the left and right sides of the driver's seat 6. Each operation lever 101L, 101R is connected to a pilot valve (not shown) operated by the operation lever.

  The pilot valve connected to the left operation lever 101L is a turning / arm pilot valve. The turning / arm pilot valve is connected to the turning control valve V4 and the arm control valve V7 via a pilot hose. The turning / arm pilot valve is operated by the left operation lever 101L to operate the turning control valve V4 and the arm control valve V7.

  The pilot valve connected to the right operating lever 101R is a boom / bucket pilot valve. The boom / bucket pilot valve is connected to the boom control valve V5 and the bucket control valve V6 via a pilot hose. The boom / bucket pilot valve is operated by the right operation lever 101R to operate the boom control valve V5 and the bucket control valve V6.

A dozer lever 102 is provided on the right side of the driver's seat 6. The dozer lever 102 is a lever for operating the dozer device 7. The dozer lever 102 is connected to a dozer pilot valve operated by the lever. The dozer pilot valve is connected to the first dozer control valve V13 via a pilot hose.
In front of the driver's seat 6, traveling levers 103L and 103R and operation pedals (swing pedal 104 and SP pedal 105) are provided. The left traveling lever 103L is a lever for operating the left traveling device 3. The right travel lever 103R is a lever for operating the right travel device 3. The swing pedal 104 is a pedal that swings the swing bracket 14. The SP pedal 105 is a pedal for operating a hydraulic attachment mounted instead of the bucket 17.

  The travel levers 103L and 103R are disposed in front of the driver's seat 6. The travel levers 103L and 103R are connected to a travel pilot valve below the step 20. The traveling pilot valve is connected to the traveling right control valve V10 and the traveling left control valve V12 via a pilot hose. The traveling pilot valve is operated by the left and right traveling levers 103L and 103R, thereby controlling the traveling right control valve V10 and the traveling left control valve V12. Traveling pedals 106L and 106R are provided in front of the driver's seat 6, and the traveling device 3 can be operated by the traveling pedals 106L and 106R.

  The swing pedal 104 is disposed on the right side of the travel levers 103L and 103R. The swing pedal 104 is connected to a swing pilot valve located below the step 20. The swing pilot valve is connected to the swing control valve V2 via a pilot hose. The swing pilot valve is operated by the swing pedal 104 to control the swing control valve V2.

  The SP pedal 105 is disposed on the left side of the travel levers 103L and 103R. The SP pedal 105 is connected to an SP pilot valve below the step 20. The SP pilot valve is connected to the SP first control valve V8 and the SP second control valve V3 via a pilot hose. The SP pilot valve is operated by the SP pedal 105 to control the SP first control valve V8 and the SP second control valve V3.

<Cabin>
As shown in FIGS. 20 to 22, the cabin 5 includes a first support 121, a second support 122, a third support 123, a first connection plate 124, a second connection plate 125, a third connection plate 126, and a fourth connection. A plate 127, a lower plate 128, and a reinforcing member 130 are provided.

  The first column 121, the second column 122, and the third column 123 are erected in the vicinity of the driver's seat 6. The first support column 121 has a front part 121a, an upper part 121b, and a rear part 121c. The front part 121a is a part that stands on the right front side of the driver's seat 6 and extends upward from below. The upper part 121b is curved from the upper end part of the front part 121a and extends rearward. The rear part 121c is curved from the rear end part of the upper part 121b and extends downward. The second support column 122 has a front part 122a, an upper part 122b, and a rear part 122c. The front portion 122a is a portion that stands on the left front side of the driver's seat 6 and extends upward from below. The upper part 122b is curved from the upper end part of the front part 122a and extends backward. The rear portion 122c is curved from the rear end portion of the upper portion 122b and extends downward. The third column 123 is erected on the left side of the driver's seat 6. The third support column 123 is disposed behind the second support column 122 and extends upward from below. The upper end part of the 3rd support | pillar 123 is connected to the middle part of the upper part 122b.

The door 120 is attached to the 3rd support | pillar 123 through a hinge so that opening and closing is possible. The operator can get on and off the cabin 5 by opening the door 120. That is, as shown in FIGS. 20 and 22, the entrance 5 a of the cabin 5 is formed between the second support column 122 and the third support column 123.
As shown in FIG. 20, the first connecting plate 124 connects the lower part of the front part 121 a of the first support column 121 and the lower part of the front part 122 a of the second support column 122. The second connecting plate 125 connects the upper part of the front part 121 a of the first support column 121 and the upper part of the front part 122 a of the second support column 122. As shown in FIG. 21, the third connection plate 126 connects the upper part of the rear part 121 c of the first support column 121 and the upper part of the rear part 122 c of the second support column 122. The fourth connecting plate 127 connects the lower part of the rear part 121 c of the first support column 121 and the lower part of the rear part 122 c of the second support column 122.

  As shown in FIG. 21, the lower plate 128 is connected to the lower ends of the columns (first column 121, second column 122, and third column 123). In the present embodiment, the lower plate 128 has an extending direction (a direction parallel to the vertical axis O) in which the normal direction of the plate surface extends upward from the lower ends of the columns (first column 121, second column 122, and third column 123). ) To be substantially parallel to each other. The columns (first column 121, second column 122, and third column 123) are connected to the lower plate 128 and extend upward.

  The lower plate 128 is a rectangular frame-shaped plate, and includes a front frame portion 128a, a left frame portion 128b, a right frame portion 128c, and a rear frame portion 128d. The front frame portion 128 a extends in the body width direction, and is connected to the lower end portion of the first support column 121 and the lower end portion of the second support column 122. The left frame portion 128 b extends rearward from the left end portion of the front frame portion 128 a and is connected to the lower end portion of the first support column 121 and the lower end portion of the third support column 123. The right frame portion 128c extends rearward from the right end portion of the front frame portion 128a. The rear frame portion 128d extends in the body width direction, and connects the rear end portion of the left frame portion 128b and the rear end portion of the right frame portion 128c.

As shown in FIG. 21, the lower plate 128 has a plurality of projecting portions 128 e to 128 j that project inward of the cabin (in the direction approaching the driver's seat 6). In the present embodiment, the lower plate 128 has a first protrusion 128e, a second protrusion 128f, a third protrusion 128g, a fourth protrusion 128h, a fifth protrusion 128i, and a sixth protrusion 128j. .
The 1st protrusion part 128e protrudes back from the left part of the front frame part 128a. The second protruding portion 128f protrudes rearward from the right portion of the front frame portion 128a. The third protruding portion 128g protrudes rightward from the front portion of the left frame portion 128b. The fourth protruding portion 128h protrudes rightward from the rear portion of the left frame portion 128b. The fifth protruding portion 128i protrudes leftward from the rear portion of the right frame portion 128c. The sixth projecting portion 128j projects forward from the left portion of the rear frame portion 128d.

  Each protrusion part 128e-128j has the fixing | fixed part fixed to the body 2 with a volt | bolt. Each fixing portion has a through hole through which a bolt is inserted. Here, the fixing portion of the third protrusion 128g will be described as a representative example. As shown in FIG.23 and FIG.24, the 3rd protrusion part 128g has the two fixing | fixed part 133a, 133b. The two fixing portions 133a and 133b are provided at intervals in the front-rear direction (the length direction of the left frame portion 128b). Through holes are formed in the fixing portions 133a and 133b, and the lower plate 128 is fixed to the step 20 of the machine body 2 by bolts inserted through the through holes. In other words, the step 20 is fixed to the upper part of the lower plate 128.

The vicinity of the entrance / exit 5a of the cabin 5 is reinforced by the reinforcing member 130 because the strength becomes low when the door 120 is opened and becomes a large opening.
As shown in FIG. 22, the reinforcing member 130 includes a first reinforcing material 131, a second reinforcing material 129, and a third reinforcing material 132. The first reinforcing member 131 is connected to the second support column 122, and the third reinforcing member 132 is connected to the third support member 123.

As shown in FIG. 24, the second reinforcing material 129 is disposed between the second support column 122 and the third support column 123, and extends in the front-rear direction. The second reinforcing material 129 has a first part 129a and a second part 129b. The first part 129a and the second part 129b are integrally formed.
The first portion 129 a extends in the front-rear direction and connects the second support column 122 and the third support column 123. The first portion 129a has a lower end connected (welded) to the upper surface of the left frame portion 128b of the lower plate 128, extends upward, then curves and extends rightward (inward of the cabin 5). The 1st site | part 129a has the 1st edge part connected (welded) to the support | pillar in the edge part by the side of a support | pillar. The first end portion has a first front end portion 129 c connected (welded) to the second support column 122 and a first rear end portion 129 d connected (welded) to the third support column 123.

  The second part 129b is formed integrally with the first part 129a on the right side (driver's seat 6 side) of the intermediate portion in the length direction (front-rear direction) of the first part 129a, and extends in the front-rear direction. The length of the second part 129b in the front-rear direction is shorter than the length of the first part 129a in the front-rear direction. The second part 129b has a lower end connected to the upper surface of the left frame part 128b of the lower plate 128, and extends upward, then curves and extends to the left, and is connected to the first part 129a. The 2nd site | part 129b has the 2nd edge part arrange | positioned in the edge part by the side of a support | pillar at intervals with the support | pillar. The second end portion is provided on the second support column 122 side and spaced from the second support column 122, and the second end portion 129e is provided on the third support column 123 side and spaced from the third support column 123. And a second rear end portion 129f that is disposed open.

  As shown in FIGS. 23 and 25, the first reinforcing member 131 has a first plate portion 131a and a second plate portion 131b. The first plate portion 131a is arranged with one surface facing downward and the other surface facing upward. The first plate portion 131 a is attached to the upper surface of the lower plate 128. In addition, the 1st board part 131a and the 2nd board part 131b may be what bent or curved one board member, and what joined different board members by welding etc. may be sufficient as it. .

  The second plate portion 131b is a plate member that stands up from the other side (left side) of the first plate portion 131a in the body width direction, with one surface facing the other side (left side) in the body width direction and the other surface facing the other side. It is arranged toward one side (right side) in the body width direction. The second plate portion 131b extends in a direction (front-rear direction) intersecting with the extending direction of the column, and one end side (front side) of the extending direction is connected to the column (second column 122, third column 123). Yes. The second plate portion 131b has a first reinforcing portion 131c and a second reinforcing portion 131d.

  The first reinforcing portion 131 c is provided at the front portion (an inclined plate portion 131 f described later) of the second plate portion 131 b and is welded to the second support column 122. The first reinforcing portion 131c has a first portion 131c1 and a second portion 131c2. The first portion 131c is provided on the upper edge of the front portion of the second plate portion 131b, and is welded to the right surface (one surface in the body width direction) of the second column 122. The second portion 131c2 is provided on the front left surface of the second plate portion 131b and is welded to the rear edge of the second support column 122. In FIG. 25, since the second portion 131c2 is in a hidden position (the back side in the figure), the welded range is indicated by an arrow. A weld bead BE1 is shown in the first portion 131c1.

  The second reinforcing portion 131d is in contact with and welded to the second reinforcing member 129. The second reinforcing portion 131d has a first portion 131d1 and a second portion 131d2. The first portion 131d1 is provided at the rear portion of the second plate portion 131b so as to protrude rearward from the first plate portion 131a, and is welded to the upper surface front portion of the second portion 129b of the second reinforcing member 129. The second portion 131d2 is provided on the left surface of the second plate portion 131b and is welded to the right edge of the first portion 129a of the second reinforcing member 129. In FIG. 25, since the second portion 131d2 is in a hidden position (the back side in the figure), the welded range is indicated by an arrow. A weld bead BE2 is shown in the first portion 131d1. As described above, the other end side (rear side) of the second plate portion 131b in the extending direction is connected (welded) to the second reinforcing material 129.

  The first plate portion 131a has a third reinforcing portion 131e. The third reinforcing portion 131e has a first portion 131e1 and a second portion 131e2. The first portion 131e1 is provided at the front right edge of the first plate portion 131a and is welded to the upper surface of the front frame portion 128a of the lower plate 128. The second portion 131e2 is provided on the right edge and the rear edge of the first plate portion 131a behind the first portion 131e1, and is welded to the upper surface of the left frame portion 128b of the lower plate 128. In FIG. 25, the first portion 131e1 shows the weld bead BE3, and the second portion 131e2 shows the weld bead BE4. The weld bead BE3 and the weld bead BE4 are provided continuously.

As described above, the first reinforcing member 131 includes the first reinforcing portion 131c, the second reinforcing portion 131d, and the third reinforcing portion 131e. Therefore, even when the work machine 1 swings back and forth, stress concentration on the connection part between the cabin 5 and the machine body 2 is less likely to occur, and the strength of the cabin 5 is improved.
As shown in FIGS. 23 and 25, the second plate portion 131b has an inclined plate portion 131f and a low plate portion 131g. The inclined plate portion 131f is provided at the front portion of the second plate portion 131b. The inclined plate portion 131f is substantially in side view so as to gradually increase from the other end side in the extending direction (second reinforcing portion 131d side) to the one end side in the extending direction (first reinforcing portion 131c side). It is formed in a triangular shape. The inclined plate portion 131f is provided with a first reinforcing portion 131c. Specifically, the 1st reinforcement part 131c is provided along the edge of the inclination board part 131f. By providing the inclined plate portion 131f, the length of the first reinforcing portion 131c (the length of the weld bead BE1) can be extended, and the connection strength can be improved. The low plate portion 131g is a portion having a height lower than that of the inclined plate portion 131f, and is provided on the rear side (the second reinforcing portion 131d side) of the inclined plate portion 131f.

  As shown in FIG. 23, the second plate portion 131b has a first contact portion 131h. The first contact portion 131h is provided at the rear portion of the second plate portion 131b and is in contact with and connected to the second front end portion 129e of the second reinforcing member 129. The first plate portion 131a has a second contact portion 131i. The second contact portion 131 i is provided at the rear portion of the first plate portion 131 a and is in contact with the second front end portion 129 e of the second reinforcing member 129. That is, the second plate portion 131b and the first plate portion 131a are both in contact with the second front end portion 129e of the second reinforcing member 129. The second reinforcing portion 131d extends rearward (to the second reinforcing material 129 side) from the first contact portion 131h and the second contact portion 131i.

  As shown in FIG. 23, the first contact portion 131h and the second contact portion 131i are located between two adjacent fixed portions 133a and 133b at positions extending from one end side to the other end side in the extending direction. Is the position. The strength of the cabin 5 is increased by fixing the lower plate 128 to the airframe 2 with bolts by the fixing portions 133a and 133b. Therefore, the first abutting portion 131h and the second abutting portion 131i, which are the portions where the second reinforcing member 129 and the first reinforcing member 131 are in contact with each other and are welded, are connected to the two adjacent fixing portions 133a and 133b. By providing it in between, the cabin 5 can obtain high strength.

  As shown in FIG. 26, the third reinforcing member 132 is formed of a plate material, with one surface facing the other side (left side) in the body width direction and the other surface facing one side (right side) in the body width direction. Are arranged. The third reinforcing member 132 has a first reinforcing portion 132a, a second reinforcing portion 132b, and a third reinforcing portion 132c. The first reinforcing portion 132 a is provided at the rear portion of the third reinforcing member 132 and is in contact with and welded to the side surface (left surface) of the third support column 123. The second reinforcing portion 132 b is provided at the front portion of the third reinforcing member 132 and is in contact with and welded to the upper surface of the second reinforcing member 129. The third reinforcing portion 132 c is provided at the lower edge of the third reinforcing member 132 and is in contact with and welded to the upper surface of the left frame portion 128 b of the lower plate 128.

Thus, the 3rd reinforcement material 132 has the 1st reinforcement part 132a, the 2nd reinforcement part 132b, and the 3rd reinforcement part 132c. Therefore, even when the work machine 1 swings back and forth, stress concentration on the connection part between the cabin 5 and the machine body 2 is less likely to occur, and the strength of the cabin 5 is improved.
The third reinforcing member 132 has a third contact portion 132d. The third contact portion 132 d is provided at the front portion of the third reinforcing member 132 and is in contact with the second rear end portion 129 f of the second reinforcing member 129. The second reinforcing portion 132b extends forward from the third contact portion 132d.

In the present embodiment, the second reinforcing member 129 and the reinforcing member 130 (the first reinforcing member 131 and the third reinforcing member 132) are provided connected to the upper surface of the left frame portion 128b of the lower plate 128. The second reinforcing member 129 and the reinforcing member 130 may be connected to the upper surface of another portion (right frame portion, front frame portion, rear frame portion) of the lower plate 128.
As shown in FIGS. 17 and 18, a floor mat 134 is placed above the step 20. The floor mat 134 is disposed in front of the support base 75 that supports the driver's seat 6. On the upper surface of the floor mat 134, a plurality of protrusions 134g for preventing slipping are provided. The floor mat 134 has a substantially rectangular shape in plan view, and has four edges (outer edges). The four edges are a front edge part 134a, a left edge part 134b, a right edge part 134c, and a rear edge part 134d. The front edge portion 134a is disposed above the front frame portion 128a. The left edge portion 134b is disposed above the left frame portion 128b. The right edge portion 134c is disposed above the right frame portion 128c. The rear edge portion 134d is disposed in front of the rear frame portion 128d. In this embodiment, the floor mat 134 is composed of two sheets of the front part 134A and the rear part 134B, but may be composed of one sheet or three or more sheets.

  As shown in FIG. 18, a first notch 134e is provided at the front of the left edge 134b, and a second notch 134f is provided at the rear of the left edge 134b. As shown in FIG. 27, the left edge portion 134b is in contact with the side surface (right surface) of the second plate portion 131b of the first reinforcing member 131 at the first cutout portion 134e. As shown in FIG. 28, the left edge portion 134b is in contact with the side surface (right surface) of the third reinforcing member 132 at the second cutout portion 134f. An intermediate portion (a portion between the first cutout portion 134e and the second cutout portion 134f) of the left edge portion 134b is placed on the upper surface of the first portion 129a of the second reinforcing member 129.

  The floor mat 134 has an inclined surface that increases from the inside of the floor mat 134 toward the edge (outer edge). The inclined surface includes a first inclined surface 134h and a second inclined surface 134i. As shown in FIG. 27, the first inclined surface 134h is an inclined surface that increases from the inside toward the first cutout portion 134e of the left edge portion 134b. The first inclined surface 134h is formed in an L shape in plan view so as to follow the first cutout portion 134e. As shown in FIG. 28, the second inclined surface 134i is an inclined surface that increases from the inside of the floor mat 134 toward the second notch portion 134f of the left edge portion 134b. The second inclined surface 134i is formed in an L shape in plan view so as to follow the second notch 134f.

  The upper edge of the first inclined surface 134h is disposed at the same height as the upper edge of the low plate portion 131g. The upper edge of the second inclined surface 134i is disposed at the same height as the upper edge of the low plate portion 131g. Thereby, when the earth and sand accumulated on the floor mat 134 are swept out from the entrance / exit 5a, it is possible to sweep out the first inclined surface 134h and the second inclined surface 134i beyond the low plate portion 131g. Therefore, it becomes easy to sweep out the earth and sand, and contamination of the hydraulic equipment due to the earth and sand accumulated on the floor mat 134 can be prevented. Further, since the edge of the floor mat 134 is better fitted, a good appearance can be obtained. In the present embodiment, the first inclined surface 134h and the second inclined surface 134i are provided in order to make the upper edge of the floor mat 134 the same height as the upper edge of the low plate portion 131g. For example, the height of the upper surface of substantially the entire area of the floor mat 134 (excluding the plurality of anti-slip convex portions 134g) may be the same as the upper edge of the low plate portion 131g.

<Unload lever>
As shown in FIGS. 17, 18, and 29, a control box 135 </ b> L is provided on one side (left side) of the driver's seat 6. On the other side (right side) of the driver's seat 6, a control box 135R is provided.

  A duct 98 having an air-conditioner outlet is provided in front of the control box 135R. An operation lever 101R and an armrest 136R are attached to the upper portion of the control box 135R. A bellows member 107R is mounted on the front surface of the control box 135R. The operation lever 101R protrudes upward from the bellows member 107R and extends upward. The operation lever 101R is shifted forward and inward (toward the driver's seat 6) as it extends upward. A dozer lever 102 is attached to the side (right side) of the control box 135R. The armrest 136R extends upward from the rear upper surface of the control box 135R, and then curves and extends rearward. The upper surface 136Ra of the armrest 136R is an inclined surface that goes downward as it goes forward.

  An operation lever 101L and an armrest 136L are attached to the upper portion of the control box 135L. A bellows member 107L is attached to the front upper surface of the control box 135L. The operation lever 101L protrudes upward from the bellows member 107L and extends upward. The operation lever 101L moves forward and inward (toward the driver's seat) as it extends upward. The armrest 136L extends upward from the rear upper surface of the control box 135L, and then curves and extends rearward. The upper surface 136La of the armrest 136L is an inclined surface that goes downward as it goes forward.

  An unload lever 137 is attached to the control box 135L. The unload lever 137 is supported by the control box 135L so as to be swingable upward and downward. The unload lever 137 can be operated to determine whether or not to supply hydraulic oil to the hydraulic equipment. When the unload lever 137 is swung downward, supply of hydraulic oil to the hydraulic equipment is permitted. When the unload lever 137 is swung upward, the supply of hydraulic oil to the hydraulic equipment is cut off, and it becomes impossible to drive the work device 4 and the like. 17, 18 and 29 show a state where the unload lever 137 is swung downward (hereinafter referred to as a downward swinging state). Hereinafter, the position of the unload lever 137 in the downward swing state will be described.

  As shown in FIG. 17, the unload lever 137 extends forward and downward from the front portion of the control box 135L in a side view, and then bends and extends forward and upward. Further, as shown in FIG. 18, the unload lever 137 extends forward from the front portion of the control box 135L in a plan view, then bends and extends forward and inward of the cabin (toward the driver's seat 6). Yes.

  As shown in FIG. 18, the front end portion 137 a of the unload lever 137 is located on one side (left side) of the operation pedal (SP pedal) 105. Specifically, the front end portion 137 a of the unload lever 137 connects the end portion 105 a on one side (left side) of the operation pedal (SP pedal) 105 and the end portion on one side (left side) in the driver's seat 6. It is located on one side (left side) of the straight line L7. In FIG. 18, a straight line connecting the end portion 105a and the left front corner 6b of the driver seat 6 is shown as a straight line L7 connecting the end portion 105a and the one side (left side) end portion of the driver seat 6. Yes. As shown in FIGS. 17 and 29, the upper end portion 137b of the unload lever 137 is located above the front upper end portion 135La of the control box 135L, and is the central portion in the width direction of the seat surface of the driver's seat 6. It is located above the height of 6a. Further, the upper end portion 137b of the unload lever 137 is located on an extension line L8 obtained by extending the upper surface 136La of the armrest 136L forward.

  With the configuration described above, the position of the unload lever 137 in the downward swing state is a position away from the driver's seat 6. Therefore, as shown by the phantom line (two-dot chain line) in FIG. 29, even when the height of the worker H seated in the driver's seat 6 is high, the left knee of the worker H moves to the unload lever 137 in the downward swinging state. There is no risk of contact. Further, the operation of the operation pedal (SP pedal) 105 by the worker H's left foot is not hindered by the unload lever 137.

<Relay plate>
As shown in FIGS. 16 and 30 to 33, the relay plate 110 is fixed to the lower surface of the step 20. The relay plate 110 relays a pilot hose connecting the pilot valve and the first control valve 11. In other words, the pilot hose connects the pilot valve and the first control valve 11 via the relay plate 110.

The type and number of pilot hoses relayed by the relay plate 110 are not limited, but in the present embodiment, the relay plate 110 relays three pilot hoses. Hereinafter, for convenience, the three pilot hoses are referred to as a first pilot hose, a second pilot hose, and a third pilot hose.
The first pilot hose is a pilot hose that relays and connects the dozer pilot valve and the first dozer control valve V13 with the relay plate 110. As shown in FIG. 33, the first pilot hose is a first upstream hose 114 that connects the pilot valve for dozer and the relay plate 110, and a first that connects the relay plate 110 and the first control valve V13 for dozer. And a downstream hose 115.

  The second pilot hose is a pilot hose that relays and connects the dozer pilot valve and the second dozer control valve V9 with the relay plate 110. As shown in FIG. 33, the second pilot hose is a second upstream hose 116 that connects the dozer pilot valve and the relay plate 110, and the second pilot hose 116 that connects the relay plate 110 and the second control valve V9 for dozer. And a downstream hose 117.

  The third pilot hose is a pilot hose that connects the pivot / arm pilot valve and the arm control valve V7 via the relay plate 110. As shown in FIG. 33, the third pilot hose is a third upstream hose 118 that connects the pivot / arm pilot valve and the relay plate 110, and a third pilot hose 118 that connects the relay plate 110 and the arm control valve V7. And a downstream hose 119.

  The first upstream hose 114 and the second upstream hose 116 extend downward from the dozer pilot valve connected to the dozer lever 102 and pass through an opening 20b provided at the right rear portion of step 20 as shown in FIG. The step 20 is led below. The third upstream hose 118 extends downward from the turning / arm pilot valve connected to the operation lever 101L, and is guided downward of the step 20 through an opening 20c provided at the left rear portion of the step 20. .

  The relay plate 110 is arranged with one surface facing right (one in the body width direction) and the other surface facing left (the other in the body width direction). The relay plate 110 is a substantially rectangular plate, and is arranged with its longitudinal direction directed in the front-rear direction. Fixing members 109 are attached to the front end portion and the rear end portion of the relay plate 110, respectively. The fixing member 109 extends in the vertical direction, and the upper end portion is fixed to the lower surface of the step 20. Thereby, the relay plate 110 is fixed to the lower surface of the step 20.

  A plurality of pipe joints are attached to the rear part of the relay plate 110. Each pipe joint connects two hoses so that they can communicate. As shown in FIGS. 30 to 32, in this embodiment, three pipe joints (first pipe joint 111, second pipe joint 112, and third pipe joint 113) are attached. The first pipe joint 111 is disposed on the rear upper part of the relay plate 110. The second pipe joint 112 is disposed below the first pipe joint 111. The third pipe joint 113 is disposed in front of the second pipe joint 112. The first pipe joint 111, the second pipe joint 112, and the third pipe joint 113 are cylindrical, and are fitted and welded so as to pass through holes provided in the relay plate 110, whereby the relay plate 110. And are connected integrally.

Conventionally, since the hose is fixed to the relay plate 110 with the nut, it takes time to assemble the hose. According to this embodiment, the pipe joint (the first pipe joint 111, the second pipe joint 112, Since the third pipe joint 113) is integrally connected to the relay plate 110, the hose can be assembled easily.
The first pipe joint 111, the second pipe joint 112, and the third pipe joint 113 protrude on both sides of the relay plate 110 (from one surface and the other surface). That is, the first pipe joint 111 has a protruding portion 111 a protruding from one surface of the relay plate 110 and a protruding portion 111 b protruding from the other surface of the relay plate 110. The second pipe joint 112 has a protruding portion 112 a protruding from one surface of the relay plate 110 and a protruding portion 112 b protruding from the other surface of the relay plate 110. The third pipe joint 113 has a protruding portion 113 a protruding from one surface of the relay plate 110 and a protruding portion 113 b protruding from the other surface of the relay plate 110.

  As shown in FIG. 30, the protrusion length of the protrusion 111a of the first pipe joint 111 from the relay plate 110 is L1, the protrusion length of the protrusion 112a of the second pipe joint 112 from the relay plate 110 is L2, When the protruding length of the protruding portion 113a of the three pipe joint 113 from the relay plate 110 is L3, L1 = L3> L2. Further, the protrusion length of the protrusion 111b of the first pipe joint 111 from the relay plate 110 is L4, the protrusion length of the protrusion 112b of the second pipe joint 112 from the relay plate 110 is L5, and the protrusion of the third pipe joint 113 is When the protruding length of the protruding portion 113b from the relay plate 110 is L6, L4 = L6 <L5. In the present embodiment, L1 + L4 = L2 + L5 = L3 + L6, and by using common parts as the first pipe joint 111, the second pipe joint 112, and the third pipe joint 113, the types of parts are reduced and the cost is reduced. I am trying.

The first upstream hose 114 and the first downstream hose 115 described above are connected to the first pipe joint 111. Specifically, the first upstream hose 114 is connected to the protrusion 111a, and the first downstream hose 115 is connected to the protrusion 111b.
The second upstream hose 116 and the second downstream hose 117 described above are connected to the second pipe joint 112. Specifically, the second upstream hose 116 is connected to the protruding portion 112a, and the second downstream hose 117 is connected to the protruding portion 112b.

The third upstream hose 118 and the third downstream hose 119 described above are connected to the third pipe joint 113. Specifically, the third upstream hose 118 is connected to the protrusion 113a, and the third downstream hose 119 is connected to the protrusion 113b.
Here, as described above, the plurality of pipe joints (the first pipe joint 111, the second pipe joint 112, and the third pipe joint 113) attached to the relay plate 110 are projected in the same direction from the relay plate 110. Includes pipe fittings of different lengths. That is, at least some of the plurality of pipe joints have different projecting lengths from the relay plate 110 in the same direction. Therefore, it is possible to easily connect (assemble) the hose to the pipe joint. Specifically, since the protruding length L1 of the protruding portion 111a protruding from one surface of the relay plate 110 is different from the protruding length L2 of the protruding portion 112a, the first upstream hose 114 and the second upstream hose 116 are different. Are less likely to interfere with each other, and the connection is facilitated. Further, since the protruding length L3 of the protruding portion 113a and the protruding length L2 of the protruding portion 112a are different, it is difficult to interfere with each other when connecting the third upstream hose 118 and the second upstream hose 116. Becomes easy. Further, since the protruding length L4 of the protruding portion 111b protruding from the other surface of the relay plate 110 is different from the protruding length L5 of the protruding portion 112b, the first downstream hose 115 and the second downstream hose 117 are connected. When it does, it becomes difficult to interfere with each other, and connection becomes easy. Further, since the protruding length L6 of the protruding portion 113b and the protruding length L5 of the protruding portion 112b are different, it is difficult to interfere with each other when connecting the third downstream hose 119 and the second downstream hose 117. Becomes easy.

  As shown in FIG. 30, step 20 has an inner edge part that forms an inspection port 20d. The first pipe joint 111 is disposed below the inspection port 20d or near the inspection port 20d. The second pipe joint 112 is disposed below the first pipe joint 111. The third pipe joint 113 is disposed directly below the inspection port 20d. The inspection port 20 d is provided in front of the support base 75 that supports the driver's seat 6. The inspection port 20d is closed from the upper surface side of the step 20 by a removable lid 20e. By removing the lid 20e, the worker accesses the pipe joint (the first pipe joint 111, the second pipe joint 112, and the third pipe joint 113) from the top of the step 20 through the inspection port 20d. Hose can be connected to. Here, although the 2nd pipe joint 112 exists under the 1st pipe joint 111, the 1st pipe joint 111 and the said protrusion length differ. Specifically, the protrusion length L5 of the protrusion 112b of the second pipe joint 112 is longer than the protrusion length L4 of the protrusion 111b of the first pipe joint 111. Therefore, the connection of the hose to the second pipe joint 112 can be easily performed without being obstructed by the first pipe joint 111.

<Weight>
As shown in FIG. 34, the first weight 10 provided in the rear part of the machine body 2 has a plurality of recesses on the surface (rear surface) opposite to the machine body 2. The recesses include first recesses 141L and 141R, second recesses 142L and 142R, a third recess 143, a fourth recess 144, and fifth recesses 145L and 145R. Each recess is recessed toward the body 2 (toward the front).

  The first recesses 141L and 141R are provided at symmetrical positions across the center in the body width direction. One first recess 141L is provided on one side (left side) in the body width direction. The other first concave portion 141R is provided on the other side (right side) in the body width direction. The first recesses 141 </ b> L and 141 </ b> R are positioned below the vertical center of the first weight 10. As shown in FIG. 38, the first recesses 141L and 141R are formed in a truncated cone shape whose diameter gradually decreases from the rear toward the front.

  A first fixing portion 146 is provided in the first recesses 141L and 141R. The first fixing portion 146 is a portion that is fixed to the body 2. The first fixing portion 146 includes an insertion portion 147 provided in the first recess 141 and a fastener (bolt) 148 inserted into the insertion portion 147. The insertion part 147 is provided in the bottom part (front part) of the frustoconical 1st recessed part 141, and has penetrated the said bottom part in the front-back direction. The fastener 148 is inserted into the insertion portion 147 and fastened to a screw hole provided in the machine body 2. As a result, the first fixing portion 146 is fixed to the body 2.

  The second recesses 142L and 142R are provided at symmetrical positions across the center in the body width direction. One second recess 142L is provided on one side (left side) in the body width direction. The second recess 142L is recessed shallower than the first recess 141L, and is adjacent to the other side (right side) of the first recess 141L in the body width direction. The other second recess 142R is provided on the other side (right side) in the body width direction. The second recess 142R is recessed shallower than the first recess 141R, and is adjacent to one side (left side) of the first recess 141R in the body width direction. The second recesses 142L and 142R are located below the center of the first weight 10 in the vertical direction. The second recesses 142L and 142R are provided with screw holes 152 facing forward.

  The third recess 143 is provided at the center in the body width direction. The third recess 143 is located at the approximate center of the first weight 10 in the vertical direction. A third fixing portion 151 is provided in the third recess 143. The third fixing portion 151 is a portion that is fixed to the body 2. A fastener (bolt) 150 is inserted into the third fixing portion 151, and the fastener 150 is fastened to a screw hole provided in the machine body 2. As a result, the third fixing portion 151 is fixed to the body 2. In the present embodiment, the first weight 10 is fixed to the body 2 with two first fixing portions 146 and one third fixing portion 151.

The 4th recessed part 144 is provided in the center of the body width direction. The fourth recess 144 is located above the third recess 143. The fourth recess 144 is provided with a screw hole 154 toward the front.
The fifth recesses 145L and 145R are provided at symmetrical positions across the center in the body width direction, and are recessed forward. One fifth recess 145L is provided on one side (left side) in the body width direction. The other fifth concave portion 145R is provided on the other side (right side) in the body width direction. The fifth recesses 145L and 145R are located above the center of the first weight 10 in the vertical direction. The shapes of the fifth recesses 145L and 145R are substantially parallelograms that are longer in the horizontal direction (machine width direction) than in the vertical direction (vertical direction) in the rear view.

  Reflectors 153L and 153R that reflect light are attached to the bottom surfaces of the fifth recesses 145L and 145R for the purpose of improving visibility at night. The reflectors 153L and 153R are attached to the surface (rear surface) opposite to the body 2 of the first weight 10. In the present embodiment, the reflectors 153L and 153R are reflector labels and are attached to the bottom surfaces of the fifth recesses 145L and 145R. In the rear view, the shape of the reflective material 153L substantially matches the shape of the fifth concave portion 145L, and the shape of the reflective material 153R substantially matches the shape of the fifth concave portion 145R.

  The first weight 10 has a substantially rectangular inner edge that forms the intake ports 140L and 140R. The intake ports 140 </ b> L and 140 </ b> R are openings for taking outside air into the airframe 2. The intake ports 140L and 140R are provided at symmetrical positions across the center in the body width direction. The air inlet 140L is located on the other side (left side) in the body width direction with respect to the fourth recess 144. The intake port 140R is located on the other side (right side) in the body width direction with respect to the fourth recess 144.

As shown in FIG. 38, the rear surface 10R of the first weight 10 is curved so as to move forward as it goes outward from the body in plan view.
In the present embodiment, the second weight 100 can be attached to the rear portion of the first weight 10. That is, as shown in FIGS. 37 and 38, the second weight 100 can be attached to the rear portion of the machine body 2 in addition to the first weight 10.

The second weight 100 has a first surface (front surface) 100F provided on the first weight 10 side and a second surface (rear surface) 100R opposite to the first surface 100F. The first surface 100F is curved so as to substantially follow the rear surface of the first weight 10. The second surface 100R is curved substantially parallel to the first surface 100F.
Hereinafter, the configuration of the second weight 100 will be described with reference to the state in which the second weight 100 is attached to the airframe 2 together with the first weight 10 (the state shown in FIGS. 37 and 38).

  As shown in FIGS. 35 and 36, the second weight 100 has a shape in which two corners of a rectangle are cut out as viewed from the rear. In other words, the second weight 100 has two notches 155L and 155R. The notches 155L and 155R are provided at symmetrical positions across the center in the body width direction. One cutout portion 155L is provided at the upper portion on one side (left side) in the body width direction. The other notch 155R is provided on the other side (right side) in the body width direction.

The second weight 100 includes a center portion 100a, a first extension portion 100b, and a second extension portion 100c. The center part 100a is located between one notch part 155L and the other notch part 155R. The first extension part 100b is located below the notch part 155L. The second extending portion 100c is located below the notch 155R.
The central portion 100a is a portion arranged near the center in the body width direction, and is formed in a substantially trapezoidal shape with the upper side longer than the lower side when viewed from the rear. The length of the central portion 100a in the vertical direction (vertical direction) is formed substantially equal to the length of the first weight 10 in the vertical direction. The length of the central portion 100 a in the horizontal direction (machine width direction) is shorter than the length of the first weight 10 in the horizontal direction. Specifically, the lateral length of the central portion 100a is shorter than the distance between the reflective material 153L and the reflective material 153R. In other words, the distance between the cutout portion 155L and the cutout portion 155R in the body width direction is shorter than the distance between the reflective material 153L and the reflective material 153R. Further, the lower edge of the notch 155L and the lower edge of the notch 155R are located below the reflectors 153L and 153R. Accordingly, when the second weight 100 is fixed to the first weight 10, the reflective material 153L is exposed from the notch 155L, and the reflective material 153R is exposed from the notch 155R. Thereby, when the 2nd weight 100 is fixed to the 1st weight 10, it can avoid that reflective material 153L, 153R is covered. Therefore, it is not necessary to attach another reflective material to the second weight 100. Further, even when the second weight 100 is attached, it is possible to prevent the design properties of the reflectors 153L and 153R and the periphery thereof in the first weight 10 from being impaired.

  Further, the distance between the notch 155L and the notch 155R in the body width direction is shorter than the distance between the intake port 140L and the intake port 140R. Further, the lower edge of the notch 155L and the lower edge of the notch 155R are located below the intake ports 140L and 140R. Thus, when the second weight 100 is fixed to the first weight 10, the intake port 140L is exposed from the notch 155L, and the intake port 140R is exposed from the notch 155R. Therefore, the attachment of the second weight 100 does not hinder the intake of outside air from the intake ports 140L and 140R into the airframe 2.

The center part 100a has the 2nd fixing | fixed part 157U and the protrusion part 161U.
The second fixing portion 157U is a portion that is fixed to the first weight 10 together with second fixing portions 157L and 157R described later. The second fixing portion 157U is provided in the center of the second weight 100 in the body width direction, and is located above the first extension portion 100b and the second extension portion 100c. The second fixing portion 157U is recessed on the second surface (rear surface) 100R side and protrudes on the first surface (front surface) 100F side. A through hole is formed in the second fixing portion 157U, and a fastener (bolt) is inserted into the through hole, and a screw portion of the fastener is screwed into a screw hole 154 formed in the fourth recess 144. . Thereby, the second fixing portion 157U is fixed to the fourth recess 144 of the first weight 10.

The protruding portion 161U is provided below the second fixed portion 157U, and protrudes in a truncated cone shape on the first surface (front surface) 100F side. In a state where the second weight 100 is fixed to the first weight 10, the protruding portion 161 U protrudes into the third recess 143.
The central portion 100a has mounting portions 156L and 156R for mounting suspension bolts. The mounting portion 156L is provided in the upper left portion of the central portion 100a. The mounting portion 156R is provided at the upper right portion of the central portion 100a. The mounting portions 156L and 156R are formed thicker than other portions of the central portion 100a. Screw holes for screwing the threaded portions of the suspension bolts are provided in the upper portions of the mounting portions 156L and 156R.

  The first extending part 100b extends leftward from the lower left part of the central part 100a. The first extending portion 100b has a thin portion 100d at the lower left portion. A protrusion 161L is provided on the front surface of the thin portion 100d. As shown in FIG. 36, the protrusion 161L protrudes from the first surface (front surface) 100F in a truncated cone shape. As shown in FIG. 38, in a state where the second weight 100 is fixed to the first weight 10, the protruding portion 161L protrudes from the first surface (front surface) 100F into the first recess 141L. A second fixing portion 157L and a mounting portion 158L described later are provided on the rear surface of the thin portion 100d. The second fixing portion 157L and the attachment portion 158L are arranged at an interval in the body width direction. Specifically, the second fixing portion 157L is located on the aircraft body side (right side), and the mounting portion 158L is located on the vehicle body outer side (left side).

  The second extending portion 100c extends rightward from the lower right portion of the central portion 100a. The second extending portion 100c has a thin portion 100e at the lower right. A protrusion 161R is provided on the front surface of the thin portion 100e. As shown in FIG. 36, the protruding portion 161R protrudes from the first surface (front surface) in a truncated cone shape. As shown in FIG. 38, in a state where the second weight 100 is fixed to the first weight 10, the protruding portion 161R protrudes from the first surface (front surface) into the first recess 141R. A second fixing portion 157R and a mounting portion 158R, which will be described later, are provided on the rear surface of the thin portion 100e. The second fixing portion 157R and the attachment portion 158R are arranged at an interval in the body width direction. Specifically, the second fixing portion 157R is located on the aircraft body side (left side), and the attachment portion 158R is located on the vehicle body outer side (right side).

A label 159 is affixed between the fixing portion 157L and the attachment portion 158L of the first extension portion 100b and between the fixing portion 157R and the attachment portion 158R of the second extension portion 100c. The label 159 is a label including a reflective material that reflects light, for example.
The second fixing portion 157L of the first extending portion 100b and the second fixing portion 157R of the second extending portion 100c are recessed on the second surface (rear surface) 100R side, and on the first surface (front surface) 100F side. It protrudes. Through holes are formed in the second fixing portions 157L and 157R. As shown in FIG. 38, a fastener (bolt) 164 is inserted into the through hole formed in the second fixing portion 157L, and the screw portion of the fastener 164 is screwed into the screw hole 152 formed in the second recess 142L. To do. Further, a fastener (bolt) 165 is inserted into the through hole formed in the second fixing portion 157R, and the screw portion of the fastener 165 is screwed into the screw hole 152 formed in the second recess 142R. Thereby, the second fixing portions 157L and 157R are fixed to the second recesses 142L and 142R of the first weight 10.

The attachment portions 158L and 158R are portions to which attachments can be attached as necessary, and are provided on the second surface (rear surface) 100R. The attachment portion 158L is provided at a position corresponding to the protruding portion 161L of the second surface 100R. The attachment portion 158R is provided at a position corresponding to the protruding portion 161R of the second surface 100R. The accessory is, for example, a hanging metal fitting such as a tie-down hook. The attachment portions 158L and 158R have a screw hole 160 into which a screw portion of an accessory such as a tie-down hook can be screwed. The screw hole 160 provided in the mounting portion 158L is provided from the second surface (rear surface) 100R side toward the protruding portion 161L, and reaches the inside of the protruding portion 161L. The screw hole 160 provided in the attachment portion 158R is provided from the second surface (rear surface) 100R side toward the protruding portion 161R, and reaches the inside of the protruding portion 161R.

  Here, since the protrusions 161L and 161R protrude into the first recesses 141L and 141R, it is possible to locally increase the thickness of the portion provided with the attachment parts 158L and 158R. Therefore, it is possible to sufficiently secure the length of the screw hole 160 and improve the strength of the attachment portions 158L and 158R. As a result, it is possible to attach an accessory to the second weight 100 without increasing the overall thickness of the second weight 100 or causing a part of the second weight 100 to protrude rearward from the second surface side. Can be obtained. Therefore, it is possible to suppress an increase in the outer shape of the work machine 1 when the second weight 100 is attached, to suppress an increase in the rear end radius of the work machine 1 and to prevent a loss of design. It becomes.

<Effect>
In the working machine 1 of the present embodiment, a fuel supply switch 42 is provided above the fuel tank 23 and at a first position in the horizontal direction with respect to the first control valve 11, and is a control device for a fuel pump 40 (different from the fuel supply switch 42). By providing the relay 43 at a second position different from the upper side of the fuel tank 42, a relatively wide space can be secured above the fuel tank 23. Therefore, it is possible to extend the first control valve 11 provided above the fuel tank 23 in the horizontal direction, and it is possible to cope with an increase in the size of the first control valve 11 that accompanies a change in the specifications of the work implement 1 or the like. .

Further, since the oil supply switch 42 is provided at a position closer to the outer edge in the horizontal direction of the machine body 2 than the first control valve 11, the oil supply switch 42 is disposed at a position that is easily accessible by the operator.
Moreover, by providing the 1st bracket 41 with which the oil pump 40 and the control apparatus 43 were attached, compared with the case where the oil pump 40 and the control apparatus 43 are attached to a separate bracket, a number of parts can be reduced. In addition, the installation space for the oil supply pump 40 and the control device 43 can be reduced.

  The hose 44 having one end side 44 a connected to the suction portion 40 a of the oil pump 40 and a storage portion 45 for storing the other end side 44 b of the hose 44 are provided. The oil supply switch 42 is located near the storage portion 45. By providing the fuel tank 23, the fuel supply switch 42 can be easily recognized when the hose 44 is taken out from the storage portion 45 when the fuel is supplied to the fuel tank 23.

Further, the control device 43 is provided on the center side of the airframe 2 with respect to the fuel tank 23, and the control device 43 is damaged by rain, earth and sand, and the like by including the center cover 30 covering the upper side of the control device 43. Can be prevented.
Further, the blazer pipe 59 is provided with a blazer pipe 59 communicating with the inside of the fuel tank 23, and a second bracket 46 to which the blazer pipe 59 and the fuel supply switch 42 are fixed and mounted on the fuel tank 23. No special bracket is required to attach the bracket. Therefore, the space required for installing the blazer pipe 59 is reduced, and the number of parts can be reduced.

  The fuel tank 23 is disposed on one side in the width direction of the machine body 2, and has a fuel supply portion 48 in front of the first control valve 11. The second bracket 46 has one surface on the first control valve. The first plate 46a disposed on the 11th side and the other surface disposed on the oil supply portion 48 side, the second plate 46b bent backward from the upper end of the first plate 46a, and the body 2 of the first plate 46a A third plate 46c that is bent backward from one end in the width direction and is connected to the second plate 46b and to which the oil supply switch 42 is attached. Thereby, the 2nd bracket 46 can be arrange | positioned in space saving, without making it interfere with the 1st control valve 11 and the oil supply part 48. FIG. Further, access to the fuel supply switch 42 is facilitated. Furthermore, the strength of the second bracket 46 can be increased by connecting the second plate 46b and the third plate 46c.

The first plate 46a has a first notch 46d on the other side in the width direction of the machine body 2 and a second notch 46e on the lower side on the one side in the width direction of the machine body 2. Thus, interference between the second bracket 46 and other members (such as the blazer pipe 59 and the return pipe 57) can be prevented.
A second control in which a hydraulic oil tank 22 that stores hydraulic oil supplied to the hydraulic equipment and a plurality of valves that control the supply of hydraulic oil to the first control valve 11 are integrated and attached to the hydraulic oil tank 22. A valve 12 and hydraulic hoses 61, 62, 63, 64 connecting the first control valve 11 and the second control valve 12 are provided. The second control valve 12 has a plurality of hydraulic pressures on the side opposite to the hydraulic oil tank 23. It has connection parts 12Aa, 12Ba, 12Ca, 12Da of the hoses 61, 62, 63, 64, and the connection parts are provided side by side in the vertical direction. Thereby, the hydraulic hoses 61, 62, 63, 64 connected to the respective connecting portions 12Aa, 12Ba, 12Ca, 12Da can be extended in the same direction without interfering with each other. Therefore, the space occupied by the hydraulic hoses 61, 62, 63, 64 is reduced, and it is possible to ensure the space for arranging these hydraulic hoses.

  The second control valve 12 includes a hydraulic pump 21 that supplies hydraulic oil to the hydraulic equipment. The second control valve 12 has a single tank port (sixth connection portion) 12b to which a hydraulic hose 66 connected to the hydraulic oil tank 22 is connected, and hydraulic pressure. A pump port (fifth connection portion) 12a to which a hydraulic hose 65 connected to the pump 21 is connected. The tank port 12b also serves as a tank port for a plurality of valves, and the pump port is a pump for a plurality of valves. Also used as a port. Thereby, the second control valve 12 can be reduced in size, and the number of hydraulic hoses connected to the second connection valve 12 can be reduced. Therefore, the assembly property of the hydraulic hose to the second connection valve 12 is improved.

  Furthermore, the working machine 1 according to the present embodiment includes a substrate 9 that can turn around the vertical axis O, a step 20 that is provided above the substrate 9 and supports the driver's seat 6, and a space between the step 20 and the substrate 9. A first hose 761 passing through, a second hose 762 passing between the step 20 and the substrate 9, and a first connector 77 connecting the first hose 761 and the second hose 762. Reference numeral 77 denotes a position below the step 20, which is disposed on the one end side with respect to an intermediate point M between the vertical axis O and one end of the substrate 9 in the direction perpendicular to the vertical axis O. As a result, the first connector 77 is disposed on the one end 9 b side in the width direction of the substrate 9 and at a position away from the vertical axis (swivel center) O. In other words, the first connector 77 is disposed at a position near the one end portion 9 b in the width direction of the substrate 9. Therefore, the operation | work which connects the 1st hose 761 and the 2nd hose 762 via the 1st connection tool 77 can be performed easily.

  In addition, a swing bearing 8 that supports the substrate 9 so as to be pivotable about the longitudinal axis O is provided, and the first connector 77 is provided on the substrate 9 outside the outer periphery of the pivot bearing 8 in a direction perpendicular to the longitudinal axis O. As a result, the first connector 77 is arranged at a position away from the vertical axis O. Thereby, the connection work of the 1st hose 761 and the 2nd hose 762 can be easily performed under Step 20.

  Separately from the first hose 761 and the second hose 762, the third hose 941 passing between the step 20 and the substrate 9 and the step 20 separately from the first hose 761, the second hose 762 and the third hose 941. A fourth hose 942 that passes between the first hose 94 and the substrate 9, a third hose 941 and a fourth hose 942, and a second connector 95 disposed on one end side of the intermediate point M, and a substrate 9 and a plurality of hose guides 96 and 97 for guiding the third hose 941. Thereby, the operation | work which connects the 3rd hose 941 and the 4th hose 942 via the 2nd connection tool 95 can be performed easily. Moreover, since the movement of the 2nd connection tool 95 connected to the 3rd hose 941 is controlled when the 3rd hose 941 is guided by the hose guides 96 and 97, the 2nd connection tool 95 is separated from the vertical axis O. Maintained in a distant position.

Further, the first connector 77 and the second connector 95 are arranged close to each other. Accordingly, the connection work of the first hose 761 and the second hose 762 to the first connection tool 77 and the connection work of the third hose 941 and the fourth hose 942 to the second connection tool 95 can be easily performed. it can.
The first connector 77 has a connection part that connects the first hose 761 and the second hose 762 disposed below the first hose 761, and the second connector 95 is a third hose 941. And a fourth hose 942 disposed in a substantially horizontal direction with respect to the third hose 941. Accordingly, the connection direction (vertical direction) of the first hose 761 and the second hose 762 connected to the first connector 77 and the connection of the third hose 941 and the fourth hose 942 connected to the second connector 95. Since the direction (horizontal direction) is different, it is possible to prevent the two hoses from interfering with each other (entanglement), and to prevent erroneous connection due to different directions.

Further, the first hose 761 and the third hose 941 are connected to equipment provided in the engine room E1, and the second hose 762 and the fourth hose 942 are connected to equipment provided above the step 20. . Thereby, the device in the engine room and the device above step 20 can be easily connected.
The plurality of hose guides include a first hose guide 96 disposed on the vertical axis O side from the intermediate point M, and a second hose guide 97 disposed on the one end side from the intermediate point M. Thus, the path of the third hose 941 can be reliably regulated by the two hose guides. Therefore, the second connector 95 connected to the third hose 941 is reliably maintained at a position away from the vertical axis O.

  The relay plate 110 fixed to the lower surface of the step 20 and the pipe joints 111, 112, 113 for connecting the two hoses (114 and 115, 116 and 117, 118 and 119) so as to communicate with each other are provided. The pipe joint penetrates the relay plate 110 and protrudes on both sides of the relay plate 110 and is connected integrally with the relay plate, so that the hose can be easily assembled.

A plurality of the pipe joints 111, 112, 113 are connected to the relay plate 110, and at least a part of the plurality of pipe joints 111, 112, 113 protrudes from the relay plate 110 in the same direction. Since they are different from each other, it is possible to easily connect (assemble) the hose to the pipe joint.
Step 20 has an inner edge part which forms inspection port 20d, and is the 1st pipe joint arranged below inspection port 20d or below the inspection port 20d as a plurality of pipe joints 111, 112, and 113. 111, and a second pipe joint 112 that is disposed below the first pipe joint 111 and has a protruding length different from that of the first pipe joint 111, so that the pipe joint 111, 112 can be accessed to connect the hose to the fitting. Further, the connection of the hose to the second pipe joint 112 can be easily performed without being obstructed by the first pipe joint 111.

  Further, the cabin 5 of the working machine 1 of the present embodiment includes a lower plate 128, a support column 122 connected to the lower plate 128 and extending upward, a first plate portion 131a connected to the upper surface of the lower plate 128, and a first plate 131a. And a first reinforcing member 131 having a second plate portion 131b that stands up from the first plate portion 131a and is connected to the support column 122. Therefore, even when the work implement 1 swings back and forth, it is possible to suppress stress concentration from occurring at the connection portion between the support column 122 and the lower plate 128, and the strength of the cabin 5 can be improved.

The second plate portion 131b includes a second reinforcing member 129 that is connected to the support 122 at one end side and connected to the other end side of the second plate portion 131b. Thus, by connecting the 2nd board part 131b and the 2nd reinforcement material 129, the stress concentration in the lower part of the support | pillar 122 becomes difficult to occur further, and the intensity | strength of the cabin 5 can be improved further.
Moreover, the 2nd board part 131b has the inclination board part 131f which becomes high gradually as it goes to the said one end side from the said other end side. Thereby, since the area of the connection part of the 2nd board part 131b and the support | pillar 122 can be increased by the inclination board part 131f, a connection intensity | strength can be improved.

  Further, the second reinforcing member 129 includes first end portions 129c and 129d connected to the support column 122 at end portions on the support column 122 side, and second end portions 129e and 129f arranged at intervals from the support column 122. The second plate portion 131b has a first contact portion 131h connected to the second end portions 129e and 129f, and the first plate portion 131a is in contact with the second end portions 129e and 129f. Two abutting portions 131i are provided. Thereby, the support | pillar 122 can be reinforced with the 1st reinforcement material 131 and the 2nd reinforcement material 129. FIG.

  Further, the lower plate 128 has a plurality of fixing portions 133a and 133b fixed to the machine body 2 of the work machine 1, and the first contact portion 131h and the second contact portion 131i are the same as the second plate portion 131b. A position along the direction from the one end side toward the other end side is a position between the adjacent fixing portions 133a and 133b. Thereby, since the 1st contact part 131h and the 2nd contact part 131i are the parts fixed to the body 2, and located between the fixed parts 133a and 133b with high intensity | strength, high intensity | strength can be obtained. it can.

  Further, a floor mat 134 placed on the upper surface of the lower plate 128 is provided, the second plate portion 131b has a lower plate portion 131g lower than the inclined plate portion 131f, and the floor mat 134 is a side surface of the second plate portion 131b. And an edge portion (left edge portion) 134b disposed at the same height as the low plate portion 131g. Thereby, when the earth and sand deposited on the floor mat 134 are swept out from the cabin 5, they can be easily swept out without being disturbed by the second plate 131b. Further, since the edge of the floor mat 134 is better fitted, a good appearance can be obtained.

  Further, the floor mat 134 has inclined surfaces (first inclined surface 134h and second inclined surface 134i) that increase from the inside of the floor mat 134 toward the edge (left edge) 134b. As a result, when the earth and sand accumulated on the floor mat 134 is swept out from the cabin 5, it can be swept over the low plate portion 131g using the inclined surface. Therefore, it becomes easy to sweep out the earth and sand, and contamination of the hydraulic equipment due to the earth and sand accumulated on the floor mat 134 can be prevented.

In addition, since the working machine 1 of the present embodiment includes the cabin 5 described above, even when the working machine 1 shakes back and forth, stress concentration occurs in the connection portion between the column 122 of the cabin 5 and the lower plate 128. The working machine can be suppressed and the strength of the cabin 5 is improved.
Further, the work machine 1 includes a working device 4 driven by hydraulic equipment, a driver seat 6 provided in the cabin 5, a control box 135 </ b> L provided on one side of the driver seat 6, and a driver seat 6. An operation pedal (SP pedal) 105 provided at the front, an unload lever 137 that is swingably supported by the control box 135L and can be operated to supply hydraulic oil to the hydraulic equipment by the swing, And the front end 137a of the unload lever 137 is located on the one side of the straight line connecting the one side end of the operation pedal 105 and the one side end of the driver's seat 6. To position. This makes it difficult for the operator's knee sitting on the driver's seat 6 to contact the unload lever 137. Further, the unload lever 137 can prevent the operation of the operation pedal 105 by the operator's foot from being hindered.

  Further, the unload lever 137 can swing in the vertical direction, and the upper end portion 137b of the unload lever 137 is higher than the upper front end portion 135La of the control box 135L when the unload lever 137 is swung downward. Is located. Thereby, it can prevent more reliably that the knee of the operator who seated in the driver's seat 6 contacts the unload lever 137.

  Furthermore, the work machine 1 of the present embodiment includes a machine body 2, a first fixing portion 146 fixed to the machine body 2, and a recess (first recess 141L) that is recessed from the surface opposite to the machine body 2 toward the machine body 2 side. , 141R), the second fixing portions 157L, 157R fixed to the first weight 10, and the first surface 100F which is the surface on the first weight 10 side, projecting into the recesses 141L, 141R Mounting portions 158L and 158R which are provided at positions corresponding to the protruding portions 161L and 161R and the protruding portions 161L and 161R of the second surface 100R which is the surface opposite to the first surface 100F and which can be attached with accessories. A second weight 100. Accordingly, the thickness of the mounting portions 158L and 158R provided at positions corresponding to the protruding portions 161L and 161R protruding into the concave portions 141L and 141R and to which the accessories can be attached is set to the outer shape of the airframe 2 including the second weight 100. The thickness can be increased without increasing the thickness.

  The first fixing portion 146 includes the insertion portion 147 provided in the recesses 141L and 141R, and the fastener 148 that is inserted through the insertion portion 147 and fastened to the body 2 so as to be fixed first. The part 146 will be provided in the recesses 141L and 141R. Therefore, it is possible to project the projecting portions 161L and 161R into the recess using the recesses 141L and 141R provided with the first fixing portion 146.

Further, the attachment portions 158L and 158R are provided from the second surface 100R toward the projecting portions 161L and 161R, and include the screw holes 160 into which the accessories can be screwed. It can be securely attached to the attachment portions 158L and 158R.
Further, the first weight 10 is provided with the reflectors 153L and 153R on the surface opposite to the body 2, and the second weight 100 has notches 155L and 155R that expose the reflectors 153L and 153R. Therefore, when the second weight 100 is attached to the first weight 10, it is possible to avoid the reflection materials 153L and 153R being covered. Therefore, it is not necessary to attach another reflective material to the second weight 100.

In addition, the first weight 10 has an inner edge portion that forms the intake ports 140L and 140R, and the second weight 100 is fixed to the first weight 10 by exposing the intake ports 140L and 140R. The attachment of 100 does not hinder the intake of outside air from the air inlet 140 into the airframe 2.
Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Work implement 2 Machine body 10 1st weight 100 2nd weight 100F 1st surface 100R 2nd surface 140L, 140R Inlet 141L, 141R 1st recessed part (recessed part)
146 1st fixing | fixed part 147 Insertion part 148 Fastener (bolt)
153L, 153R Reflector 155L, 155R Notch 157L, 157R, 157U Second fixing portion 158L, 158R Mounting portion 160 Screw hole 161L, 161R Protruding portion

Claims (5)

The aircraft,
A first weight having a first fixing portion fixed to the airframe, and a concave portion recessed toward the airframe side from a surface opposite to the airframe;
A second fixing portion that is fixed to the first weight; a protruding portion that protrudes into the recess from a first surface that is a surface on the first weight side; and a second that is a surface opposite to the first surface. A second weight having a mounting portion provided at a position corresponding to the protruding portion of the surface and capable of mounting an accessory;
Work machine equipped with.   2. The work machine according to claim 1, wherein the first fixing part includes an insertion part provided in the recess, and a fastener that is inserted into the insertion part and fastened to the machine body.   The work machine according to claim 1, wherein the attachment portion includes a screw hole that is provided from the second surface toward the protruding portion and into which the accessory can be screwed. The first weight has a reflective material attached to the surface opposite to the airframe,
The work machine according to any one of claims 1 to 3, wherein the second weight has a notch for exposing the reflective material. The first weight has an inner edge that forms an air inlet,
The work machine according to any one of claims 1 to 4, wherein the second weight is fixed to the first weight with the intake port exposed.