JP6884548B2 - Work machine - Google Patents

Description

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

Conventionally, a working machine disclosed in Patent Document 1 is known.
The working machine disclosed in Patent Document 1 includes a cabin, an air conditioner that air-conditions the inside of the cabin, a state in which the air conditioner takes in the inside air that is the air inside the cabin, and a state that takes in the outside air that is the air outside the cabin. It has an inside / outside air switching device that switches between.
The inside / outside air switching device includes a switching box, an operating shaft, a switching member, and an operating member. The switching box has an outside air intake for taking in outside air into the air conditioner and an inside air intake for taking in inside air into the air conditioner. The operating shaft is rotatably supported by a bracket fixed to the front wall of the switching box and a side wall of the switching box. The operating member is fixed to one end of the operating shaft. The switching member is fixed to the operation shaft, and by rotating the operation shaft via the operation member, the first switching position for closing the inside air intake and taking in the outside air into the air conditioner and the outside air intake are closed. Then, it is switched to the second switching position where the inside air is taken into the air conditioner.

Japanese Unexamined Patent Publication No. 2006-273055

The working machine disclosed in Patent Document 1 needs to be provided with a bracket for pivotally supporting the operating shaft, a retaining member penetrating the operating shaft in order to retain the operating shaft, and the like. There is a problem that the manufacturing cost is high because the number of points is large and it takes time and effort to assemble.
Therefore, in view of the above problems, an object of the present invention is to reduce the manufacturing cost of a working machine provided with an inside / outside air switching mechanism.

The working machine according to one aspect of the present invention includes a cabin, an air conditioner for air-conditioning the inside of the cabin, a first plate, a second plate facing the first plate, the first plate and the second plate. The third plate on which the plates are erected, the fourth plate that closes between the one end side of the first plate in the horizontal direction and the one end side of the second plate in the horizontal direction, and the horizontal direction of the first plate. and having a fifth plate which closes the space between the other end and the horizontal direction on the other end side of the second plate, has one end opening between the upper end portion of the second plate and the first plate has an opening A box body communicating with the air conditioner, a cover plate for closing one end opening of the box body, an operation shaft rotatably supported by the first plate and the second plate, and the box body. The first switching position where the air outside the cabin is taken into the air conditioner and the second switching where the air inside the cabin is taken into the air conditioner by being arranged inside and fixed to the operation shaft and rotating the operation shaft. A switching member that can be switched to a position and an operating member that is fixed to one end side of the operating shaft and that rotates the operating shaft are provided, and the cover plate is provided with the cover plate via at least a part of the operating member. It has a retaining portion that faces the first plate and restricts the axial movement of the operating member and the operating shaft to retain the operating shaft.

According to the above configuration, since the cover plate has a retaining portion for retaining the operating shaft, a bracket for pivotally supporting the operating shaft and a retaining portion for retaining the operating shaft as in the above-mentioned prior art are used. Since it is not necessary to separately provide a stopper member, the number of parts can be reduced. Further, since the operation shaft can be removed by attaching the cover plate to the box body, the bracket for pivotally supporting the operation shaft and the removal for retaining the operation shaft as in the above-mentioned conventional technique can be removed. Since it is not necessary to attach the stopper member, the manufacturing process can be simplified. As a result, the manufacturing cost of the working machine provided with the inside / outside air switching mechanism can be reduced.

It is a schematic side view of a working machine. It is a schematic plan view of a part of a working machine. It is a right side view of a part of a working machine. It is a perspective view of a part of a working machine seen from the front side. It is a perspective view which looked at the swivel frame and a cover device from the rear. It is a perspective view which looked at the cabin from the lower side. It is a perspective view of a swivel frame. It is a right side view of the arrangement of a fuel tank and the like. It is a perspective view which looked at the fuel tank etc. from the front right front side. It is a front sectional view of a fuel tank and the like. It is a perspective view which looked at the fuel tank etc. from the left front side. It is a perspective view which looked at the fuel tank etc. from the right rear side. It is a right perspective view of a tank support plate and a support plate. It is a left perspective view of a tank support plate and a support plate. It is a perspective view which shows the peripheral structure of the upper part of a hydraulic oil tank. It is a front view of the upper part of a hydraulic oil tank. It is a side view in the state which the 3rd cover is opened. It is a front view around the driver's seat. It is a perspective view of the seat stand, the inside / outside air switching device, and the outside air introduction device. It is a perspective view of the air conditioner, the inside / outside air switching device, and the outside air introduction device. It is a perspective view of the inside / outside air switching device. It is a perspective view of the front part of the inside / outside air switching device. It is an exploded perspective view of the inside / outside air switching device. It is a left side view which shows the switching state of a switching member. It is a right side view which shows the switching state of the operation member of the inside / outside air switching device. It is an exploded perspective view of the outside air introduction device. It is a front sectional view of the outside air introduction device. It is a top sectional view of the outside air introduction device. It is a perspective view of a traveling frame. It is a perspective view of a center frame. It is a top view of the central part of a center frame. It is a plan enlarged view of the central part of a center frame. It is a side sectional view of the central part of a center frame. It is a front perspective view of a swing bracket. It is a rear perspective view of a swing bracket. It is a side sectional view of a swing bracket. It is a perspective view which shows the state which the hose guide is removed from a swing bracket. It is an exploded perspective view of a hose guide. It is a perspective view seen from the bottom of the rear lower part of the cabin. It is a perspective view of a bonnet center. It is a side sectional view of the bonnet center which cross-section at the position of the 2nd reinforcing part. It is a side sectional view of the bonnet center which cross-section at the position of the 1st reinforcing part. It is a side sectional view of the mounting part. It is a back sectional view of the mounting part which was cross-sectionald at the position of the reinforcing part. It is sectional drawing which shows the other example of the reinforcing part. It is a back sectional view of the mounting part which was cross-sectionald at the position of the installation part and the screw insertion part. It is the back cross-sectional enlarged view of the mounting part which cross-section at the position of the installation part and a screw insertion part. It is a perspective view which looked at the rear bonnet from the inside. It is a perspective view of the hinge structure. It is a top sectional view of the hinge structure. It is a side view of the hinge structure with the rear bonnet closed. It is a side view of the hinge structure with the rear bonnet open. It is a side view which shows the state which pulled up the lock lever with the rear bonnet open. It is a perspective view of the state which the radiator and the oil cooler are assembled. It is a perspective view of the state where the oil cooler is fixed to the support frame. It is an exploded perspective view of the assembly part of the upper part of an oil cooler. It is an exploded perspective view of the assembly part of the lower part of an oil cooler. It is a rear view of the state which the radiator and the oil cooler are assembled. It is a rear view of the upper part of the assembly part of an oil cooler. It is a perspective view of the floor part as seen from the cabin interior side. It is a perspective view of the left side of the front lower frame as seen from the cabin interior side. It is a perspective view which shows the state which laid the floor mat. It is a perspective view of a floor mat. It is a perspective view of the left side of the front lower frame with the floor mat laid as seen from the cabin interior side. It is a side sectional view which shows the state which covered the 1st front mount by the 1st cover part. It is a perspective view of the front left side of a floor mat. It is a front view of the front left side of a floor mat. It is a top view of the 1st cover part in the state before laying a floor mat. FIG. 6 is a cross-sectional view taken along the line Y1-Y1 of FIG. FIG. 6 is a cross-sectional view taken along the line Y2-Y2 of FIG. 65A.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
First, the overall configuration of the working machine 1 will be schematically described.
FIG. 1 is a schematic side view showing the overall configuration of the work machine 1 according to the present embodiment. FIG. 2 is a schematic plan view of a part of the working machine 1.
In the present embodiment, a backhoe, which is a swivel work machine, is exemplified as the work machine 1.

As shown in FIG. 1, the working machine 1 includes a machine body (swivel table) 2, a traveling device 3, and a working device 4. A cabin 5 is mounted on the aircraft 2. A driver's seat 6 is provided in the cabin 5.
In the present embodiment, the front side (direction of arrow A1 in FIGS. 1 and 2) of the driver seated in the driver's seat 6 of the work machine 1 is forward, and the rear side of the driver (direction of arrow A2 in FIGS. 1 and 2). Will be described as the rear, the left side of the driver (front side of FIG. 1, direction of arrow B1 in FIG. 2) as the left side, and the right side of the driver (back side of FIG. 1, direction of arrow B2 in FIG. 2) as the right side.

Further, the horizontal direction, which is a direction orthogonal to the front-rear direction K1, will be described as the body width direction K2 (see FIG. 2). The direction from the central portion to the right portion or the left portion in the width direction of the airframe 2 will be described as the outer side of the airframe. In other words, the outside of the airframe is the direction K2 in the width direction of the airframe and away from the center in the width direction of the airframe 2. The direction opposite to the outside of the aircraft will be described as the inside of the aircraft. In other words, the inside of the machine is the direction K2 in the width direction of the machine and is closer to the center in the width direction of the body 2.

As shown in FIG. 1, the traveling device 3 includes a traveling frame 9 and a traveling mechanism 10. The traveling mechanism 10 is composed of a crawler type traveling mechanism. In other words, the traveling device 3 is a crawler type traveling device. The traveling mechanism 10 is provided on the left side and the right side of the traveling frame 9. Further, the traveling mechanism 10 includes an idler 10A, a driving wheel 10B, a plurality of rolling wheels 10C, an endless crawler belt 10D, and a traveling motor M1 including a hydraulic motor. The idler 10A is arranged at the front of the traveling frame 9, and the drive wheels 10B are arranged at the rear of the traveling frame 9. The plurality of rolling wheels 10C are provided between the idler 10A and the driving wheels 10B. The crawler belt 10D is wound around the idler 10A, the driving wheels 10B, and the rolling wheels 10C. The traveling motor M1 circulates and circulates the crawler belt 10D in the circumferential direction by driving the drive wheels 10B. A dozer device 7 is attached to the front portion of the traveling device 3.

The machine body 2 is rotatably supported (swivelable to the left and right) around the vertical axis (axis axis extending in the vertical direction) via a swivel bearing 8 on the traveling frame 9. The center of the swivel bearing 8 is the center of rotation of the machine body 2, and the center of rotation of the body 2 is referred to as the swivel axis X1.
As shown in FIG. 2, the cabin 5 is mounted on the left side and the front side of the airframe 2. The engine E1 is mounted on the rear part of the airframe 2. The engine E1 is located on the rear side of the cabin 5. A hydraulic pump P1 is provided on the left side of the engine E1. The hydraulic pump P1 is driven by the driving force of the engine E1. The hydraulic pump P1 discharges hydraulic oil (flood control) that drives a hydraulic actuator such as a hydraulic motor or a hydraulic cylinder mounted on the work machine 1. Further, the hydraulic pump P1 discharges the pilot pressure for operating the hydraulic valve and the oil for signals.

As shown in FIGS. 2 and 3, on the right side (side) of the airframe 2 and on the right side (side) of the cabin 5, the fuel tank T1, the battery B1, the hydraulic oil tank T2, the radiator R1 and the like. An oil cooler O1 (heat exchanger) is installed. The fuel tank T1 is a tank for storing fuel for the engine E1. The battery B1 is a storage battery that supplies electric power to the electrical components mounted on the work equipment 1. The hydraulic oil tank T2 is a tank for storing the hydraulic oil supplied to the hydraulic pump P1. The radiator R1 cools the coolant of the engine E1. The oil cooler O1 cools the hydraulic oil returning to the hydraulic oil tank T2.

The fuel tank T1 is arranged at the front part on the right side of the airframe 2. The battery B1 is located above the rear of the fuel tank T1. The hydraulic oil tank T2 is arranged behind the fuel tank T1 and the battery B1. The radiator R1 and the oil cooler O1 are arranged behind the hydraulic oil tank T2. Further, the radiator R1 and the oil cooler O1 are arranged side by side along the body width direction K2 on the side (right side) of the engine E1. The radiator R1 is arranged closer to the engine E1 than the oil cooler O1. That is, the radiator R1 is arranged on the right side of the engine E1, and the oil cooler O1 is arranged on the right side of the radiator R1. The oil cooler O1 is arranged so as to face the radiator R1.

A cooling fan driven by the driving force of the engine E1 is provided between the radiator R1 and the engine E1. This cooling fan is a suction type fan, and sucks air from the right side of the oil cooler O1 and flows it to the engine E1 side.
As shown in FIG. 2, a swivel motor M2 made of a hydraulic motor is attached to the airframe 2. The swivel motor M2 is a motor that rotationally drives the body 2 around the swivel axis X1. The swivel motor M2 is provided below the cabin 5 and below the right side of the front portion of the driver's seat 6. The swivel motor M2 is attached to a swivel board 56 described later. Further, the machine body 2 is provided with a control valve V1. The control valve V1 is a valve unit in which each control valve for controlling each hydraulic actuator mounted on the work machine 1 is integrated.

As shown in FIG. 2, the airframe 2 is equipped with an exterior cover 21 that covers the engine E1, the hydraulic pump P1, the fuel tank T1, the battery B1, the hydraulic oil tank T2, the radiator R1, and the oil cooler O1. The exterior cover 21 has a bonnet 22 and a side cover 23.
As shown in FIGS. 1 and 2, the bonnet 22 is a cover that mainly covers the engine E1. Therefore, the bonnet 22 forms an engine room for accommodating the engine E1. As shown in FIGS. 4 and 5, the bonnet 22 has a bonnet center 24 (cover member), a rear bonnet 25, a first side bonnet 26, and a second side bonnet 27. The bonnet center 24 is a cover member that covers the upper side and the front side of the engine E1. Further, the bonnet center 24 is a cover member that separates the interior of the cabin 5 from the engine room. The rear bonnet 25 is a cover member that covers the rear of the engine E1. The rear bonnet 25 is openable and closable. The first side bonnet 26 is a cover member that covers the left side of the engine E1 and the hydraulic pump. The second side bonnet 27 is a cover member that covers the right side of the engine E1, the radiator R1, and the oil cooler O1. The second side bonnet 27 is formed with an opening for taking in air in the engine room (bonnet 22).

As shown in FIG. 2, the side cover 23 is located on the right side of the cabin 5 and covers the fuel tank T1, the battery B1, and the hydraulic oil tank T2. As shown in FIGS. 2, 3 and 5, the side cover 23 has a first cover 28, a second cover 29, and a third cover 30. The first cover 28 is a cover member that covers the left side of the fuel tank T1, the battery B1, and the hydraulic oil tank T2. The second cover 29 is a cover member that covers the right side of the fuel tank T1, the battery B1, and the hydraulic oil tank T2. The third cover 30 is a cover member that covers the upper side and the front side of the fuel tank T1, the battery B1, and the hydraulic oil tank T2. The third cover 30 is openable and closable, and when the third cover 30 is opened, the upper parts of the fuel tank T1, the battery B1 and the hydraulic oil tank T2 are opened.

As shown in FIG. 4, a driver's seat 6 is provided in front of the bonnet center 24. Below the driver's seat 6, a seat base 31 that supports the driver's seat 6 is provided. A floor portion (step) 419 is arranged in front of the seat base 31, and a floor mat 32 is laid on the floor portion 419. Inside the seat base 31, an air conditioner 37 for adjusting the air in the cabin 5 is provided. The air conditioner 37 is a heating device in the present embodiment. The air conditioner may be a device having only a cooling function or a device having both a heating function and a cooling mechanism. A control device 33L is provided on the left side of the driver's seat 6. A control device 33R is provided on the right side of the driver's seat 6. The control devices 33L and 33R are devices for controlling the work device 4, the dozer device 7, and the like. In front of the driver's seat 6, a traveling lever 34 for operating the traveling device 3, a first operating pedal 35 for swinging the swing bracket 14 described later, and a work tool mounted in place of the bucket 17 described later are operated. A second operation pedal 36 is provided.

As shown in FIG. 6, the cabin 5 has a front surface portion 40 provided between the first side surface portion 38 on the left side, the second side surface portion 39 on the right side, and the front ends of the first side surface portion 38 and the second side surface portion 39. A back surface portion 41 provided between the rear ends of the first side surface portion 38 and the second side surface portion 39, and a roof 42 provided between the upper ends of the first side surface portion 38 and the second side surface portion 39 (see FIG. 1). ) And. The lower surface of the cabin 5 is open downward. The cabin 5 is mounted on the machine body 2 so as to cover the driver's seat 6, the control devices 33L and 33R, the floor mat 32, the traveling lever 34, the first operation pedal 35, the second operation pedal 36, and the like.

The first side surface portion 38 is provided with a door 43 and a side window 44. An opening / closing window 45 is provided on the upper portion of the second side surface portion 39. At the lower part of the second side surface portion 39, an outside air introduction port 46 for introducing the outdoor air (referred to as outside air) of the cabin 5 is provided. In the following description, the air inside the cabin 5 is referred to as shyness.
A windshield is provided on the front portion 40, and a rear glass 47 is provided on the back portion 41.

A first front strut portion 77 is provided at a corner portion between the front portion 40 and the first side surface portion 38. A second front strut portion 78 is provided at a corner portion between the front portion 40 and the second side surface portion 39. The first front strut portion 77 and the second front strut portion 78 are provided so as to be spaced apart from each other in the body width direction K2. A first rear strut portion 79 is provided at a corner portion between the back surface portion 41 and the first side surface portion 38. A second rear strut portion 80 is provided at a corner portion between the back surface portion 41 and the second side surface portion 39. The first rear strut portion 79 and the second rear strut portion 80 are provided so as to be spaced apart from each other in the body width direction K2.

A front lower frame 52 is provided at the lower end of the front portion of the cabin 5. The front lower frame 52 is provided between the lower ends of the first front strut portion 77 and the second front strut portion 78. The front lower frame 52 is provided with front mount members (first front mount member 48, second front mount member 49). The first front mount 48 is assembled to the left end of the front lower frame 52. The second front mount 49 is assembled to the right end of the front lower frame 52. The first front mount 48 and the second front mount 49 have anti-vibration rubber, and support the front portion of the cabin 5 with respect to the airframe 2 to provide anti-vibration.

A rear lower frame 53 is provided at the lower end of the rear portion of the cabin 5. The rear lower frame 53 is provided between the lower ends of the first rear strut portion 79 and the second rear strut portion 80. Further, the rear lower frame 53 is provided at a position higher than the front lower frame 52. A rear mount member (first rear mount member 50, second rear mount member 51) is provided on the rear frame 53. The first rear mount 50 is assembled to the left end of the rear lower frame 53. The second rear mount 51 is assembled to the right end of the rear lower frame 53. The first rear mount 50 and the second rear mount 51 are parts that have anti-vibration rubber and support the rear portion of the cabin 5 with respect to the airframe 2 to provide anti-vibration.

As shown in FIGS. 3, 5, and 7, the airframe 2 has a swivel frame 54 as a skeleton and a weight 55 attached to the rear portion of the swivel frame 54.
The swivel frame 54 includes a swivel substrate (board) 56, a plurality of vertical ribs (first vertical rib 57L, second vertical rib 57R), a support bracket 58, a partition plate 59, and a support frame 60. Further, the swivel frame 54 is provided with brackets, stays, and the like for attaching equipment, tanks, other parts, and the like mounted on the machine body 2.

As shown in FIG. 7, the swivel substrate 56 is formed of a thick steel plate or the like and constitutes the bottom portion of the machine body 2. As shown in FIG. 1, the swivel substrate 56 is rotatably supported on the traveling device 3 around a swivel axis X1 via a swivel bearing 8.
The first vertical rib 57L and the second vertical rib 57R are members for reinforcing the swivel substrate 56, and are provided so as to extend from the front portion to the rear portion of the swivel substrate 56. The first vertical rib 57L and the second vertical rib 57R are erected on the swivel board 56, and are arranged side by side at intervals in the body width direction K2. The first vertical rib 57L is located to the left of the second vertical rib 57R.

The support bracket 58 is provided on the front portion of the first vertical rib 57L and the second vertical rib 57R. The support bracket 58 and the front portions of the first vertical rib 57L and the second vertical rib 57R are provided at positions deviated to the right from the center of the swivel board 56 in the body width direction K2. The support bracket 58 has a first support portion 61A and a second support portion 61B located below the first support portion 61A at the front portion. Further, the support bracket 58 has a left connecting portion 62L and a right connecting portion 62R located to the right of the left connecting portion 62L at the rear portion. The left connecting portion 62L is connected to the front portion of the first vertical rib 57L. The right connecting portion 62R is connected to the front portion of the second vertical rib 57R. The support bracket 58 is provided with a through hole 63 from between the left connecting portion 62L and the right connecting portion 62R to between the first supporting portion 61A and the second supporting portion 61B. The through hole 63 is a passage formed by penetrating the members constituting the support bracket 58 in the front-rear direction. A hydraulic hose or the like is inserted into the through hole 63 from the machine body 2 side (rear side) toward the front.

As shown in FIG. 1, a swing bracket 14 is swingably attached to the support bracket 58 around a vertical axis (an axial center extending in the vertical direction). A working device 4 is attached to the swing bracket 14.
As shown in FIG. 7, the partition plate 59 is a member that partitions the lower part of the front surface of the engine room, and is provided along the body width direction K2. Further, the partition plate 59 is erected on the swivel board 56. The lower part of the bonnet center 24 is attached to the upper part of the partition plate 59. Further, the driver's seat 6 is provided on the front side of the partition plate 59.

As shown in FIG. 7, the support frame 60 is the rear part of the swivel board 56 and is erected behind the partition plate 59. The support frame 60 is arranged in the bonnet 22 (engine room) and supports the bonnet 22 and peripheral parts of the engine E1. The support frame 60 includes a plurality of leg members (first leg 64, second leg 65, third leg 66) erected on the swivel board 56, and a beam member 67 (fixed to the upper portion of the plurality of leg members). Support part) and. The first leg 64, the second leg 65, the third leg 66, and the beam member 67 are formed of a plate material.

The first leg 64 has a first strut portion 64A, a first horizontal portion 64B, and a hanging portion 64C. The first support column portion 64A is erected on the left side of the front portion of the engine room. The first horizontal portion 64B extends rearward from the upper end of the first strut portion 64A. The hanging portion 64C extends downward from the rear end of the first horizontal portion 64B.
The second leg 65 has a second strut portion 65A and a second horizontal portion 65B. The second strut portion 65A is erected at the center of K2 in the width direction of the machine body at the rear of the engine room. 2nd horizontal part 65B
Extends forward from the upper end of the second strut portion 65A.

The third leg 66 has a third strut portion 66A and a third horizontal portion 66B. The third support column 66A is erected on the right side of the front portion of the engine room. The third horizontal portion 66B extends rearward from the upper end of the third strut portion 66A.
The beam member 67 is placed over the first horizontal portion 64B, the second horizontal portion 65B, and the third horizontal portion 66B so that the plate surface faces up and down, and is fixed to each of these horizontal portions. A first screw hole 68 is formed in the left side portion of the beam member 67.

The screw hole is a portion in which a female screw is cut on the inner peripheral surface of a columnar column formed in a beam member 67 in a penetrating shape or a bottomed shape. The same applies to the following description.
A second screw hole 69 is formed on the right side of the beam member 67. A third screw hole 70 is formed in the machine body of the first screw hole 68, and a fourth screw hole 71 is formed in the machine body of the second screw hole 69.

The first screw hole 68 is a screw hole for attaching the first rear mount 50. The second screw hole 69 is a screw hole for attaching the second rear mount 51. Therefore, the lower end portion (rear lower frame 53) of the rear portion of the cabin 5 is attached to the beam member 67 (support frame 60) via the first rear mount 50 and the second rear mount 51. The beam member 67 is a support member that supports the rear portion of the cabin 5.

The third screw hole 70 and the fourth screw hole 71 are screw holes for attaching the upper portion of the bonnet center 24.
As shown in FIG. 4, a first mount mounting portion 72 for mounting the first front mount 48 is provided on the left side of the front portion of the airframe 2. A second mount mounting portion 73 for mounting the second front mount 49 is provided on the right side of the front portion of the machine body 2. Therefore, the lower end portion (front lower frame 52) of the front portion of the cabin 5 is attached to the first mount attachment portion 72 via the first front mount 48, and the second mount attachment portion via the second front mount 49. Attached to 73.

As shown in FIGS. 3 and 5, the weight 55 forms the lower left side surface, the lower right side surface, and the lower back surface of the engine room. As shown in FIGS. 1 and 5, the left side surface of the swivel frame 54, the front side of the weight 55, is covered with the left swivel cover 74. As shown in FIG. 3, the right side surface of the swivel frame 54, the front side of the weight 55, is covered with the right swivel cover 75. As shown in FIG. 4, the front surface of the swivel frame 54 is covered with the front swivel cover 76. Above the swivel frame 54 and in front of the seat base 31, the floor portion (step) supporting the floor mat 32 is covered.

As shown in FIG. 1, the working device 4 has a boom 15, an arm 16, and a bucket (working tool) 17. The base of the boom 15 is pivotally attached to the swing bracket 14 around a horizontal axis (an axis extending in the width direction of the machine body K2). As a result, the boom 15 can swing up and down. The arm 16 is pivotally attached to the tip end side of the boom 15 so as to be rotatable around a horizontal axis. As a result, the arm 16 can swing back and forth or up and down. The bucket 17 is provided on the tip end side of the arm 16 so that it can perform a squeeze operation and a dump operation. The work machine 1 can be equipped with another work tool (hydraulic attachment) that can be driven by a hydraulic actuator in place 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 made swingable by expanding and contracting the swing cylinder C2 (see FIG. 7) provided on the right side of the machine body 2. The boom 15 is swingable by expanding and contracting the boom cylinder C3. The arm 16 is swingable by expanding and contracting the arm cylinder C4. The bucket 17 is free to squeeze and dump by expanding and contracting the bucket cylinder (work tool cylinder) C5. The swing cylinder C2, the boom cylinder C3, the arm cylinder C4, and the bucket cylinder C5 are composed of a hydraulic cylinder (hydraulic actuator).

Next, the support structure of the fuel tank T1 will be described.
As shown in FIG. 8, the fuel tank T1 has a tank main body T11 and an extension portion T12. The fuel tank T1 is a resin product having a hollow structure formed by blow molding, rotary molding, or the like. Therefore, the tank main body T11 and the extension portion T12 are in communication with each other, and fuel is stored in the tank main body T11 and the extension portion T12.

A recess 91 is provided on the rear side of the upper part of the tank body T11. The recessed portion 91 is formed by denting the rear portion of the upper portion of the tank body T11 downward with respect to the front portion. The battery B1 is arranged in the recessed portion 91. On the contrary, the front portion of the upper portion of the tank body T11 projects upward with respect to the rear portion. A fuel filler port 93 opened and closed by a fuel cap 94 is provided on the upper surface of the projecting portion 92 protruding upward.

As shown in FIGS. 9 to 11, the tank body T11 is supported by the tank support plate 95 attached to the machine body 2. The tank support plate 95 is provided so as to be separated upward from the swivel substrate 56. That is, the tank body T11 is supported by the tank support plate 95 in a state of being separated upward from the machine body 2 (swivel substrate 56). A swing cylinder C2 is inserted in the space between the tank body T11 and the swivel board 56 (see FIG. 8). Further, the tank support plate 95 is arranged on one side (inside the machine body) of the tank body T11 (fuel tank T1). Specifically, the tank support plate 95 is arranged on the left side of the tank body T11.

As shown in FIGS. 13 and 14, the tank support plate 95 includes a side plate portion 96, a bottom plate portion 97, a mounting plate portion 98, and a plurality of reinforcing plates (first reinforcing plate 99A, second reinforcing plate 99B). Has. The side plate portion 96, the bottom plate portion 97, and the mounting plate portion 98 are integrally formed by bending one plate material. The side plate portion 96 is a plate that is long in the front-rear direction K1 and is provided in a vertical direction with the plate surface facing the machine body width direction K2. Further, the side plate portion 96 is formed to have a length extending from the front portion to the rear portion of the tank body T11 (see FIG. 11). Further, the side plate portion 96 is arranged on the lower side (one side) of the lower part of the tank body T11 (see FIG. 10).

As shown in FIGS. 13 and 14, the bottom plate portion 97 extends from the lower end of the side plate portion 96 to the outside of the machine body (tank body T11 side) and receives one side portion (left side portion) of the tank body T11. (To support.
More specifically, the bottom plate portion 97 has a first receiving portion 100 and a second receiving portion 101. The first receiving portion 100 is a portion extending from the lower end of the side plate portion 96, and is provided from the front portion to the rear portion of the side plate portion 96. The bottom of one side (left side) of the tank body T11 is placed on the first receiving portion 100 (see FIG. 10). That is, the first receiving portion 100 receives one side portion (side portion on the side inside the machine body) of the tank body T11 from the front portion to the rear portion.

The second receiving portion 101 extends from the rear portion of the first receiving portion 100 to the outside of the machine body, and the rear portion of the bottom portion 102 of the tank body T11 is placed on the second receiving portion 101. That is, the second receiving portion 101 receives the rear portion of the tank body T11. As shown in FIG. 12, the second receiving portion 101 is mounted on the mounting brackets 103A and 103B (see FIGS. 7 and 12) provided on the swivel frame 54. As shown in FIGS. 7 and 12, a support base 436 for supporting the hydraulic oil tank T2 is fixed on the swivel board 56 by welding, and mounting brackets 103A and 103B are attached to a part of the support base 436. It is fixed by welding. As shown in FIG. 14, at the rear end portion of the bottom plate portion 97, a bent portion 104 extending downward is provided by bending the plate material forming the tank support plate 95. As a result, the strength of the bottom plate portion 97 is increased.

The bottom 102 of the tank body T11 is placed on the first receiving portion 100 and the second receiving portion 101 via an elastic plate (rubber plate).
As shown in FIGS. 13 and 14, the mounting plate portion 98 extends from the side plate portion 96 to the side opposite to the tank body T11 side. Specifically, the mounting plate portion 98 extends from the upper end of the side plate portion 96 toward the inside of the machine. The mounting plate portion 98 is provided from the front portion to the rear portion of the side plate portion 96. As shown in FIG. 11, the front portion of the side plate portion 96 is bolted to a mounting boss 106 (see FIG. 7) provided on the right side of the upper surface of the support bracket 58. The rear portion of the side plate portion 96 is fixed to a support stay 107 (see FIG. 7) provided on the swivel frame 54 by bolts.

As shown in FIG. 7, the support stay 107 is fixed to a part of the support base 436 that supports the hydraulic oil tank T2 by welding.
As shown in FIG. 14, the first reinforcing plate 99A is provided at the front portion between the side plate portion 96 and the mounting plate portion 98, and is welded to the side plate portion 96 and the mounting plate portion 98. The second reinforcing plate 99B is provided at the rear portion between the side plate portion 96 and the mounting plate portion 98, and is welded to the side plate portion 96 and the mounting plate portion 98.

As shown in FIGS. 8, 9, and 10, the extension portion T12 extends downward from the tank body T11 and is supported by the machine body 2. In the present embodiment, the extension portion T12 is placed on the swivel substrate 56 via the elastic plate 108 (rubber plate) and is supported by the swivel substrate 56. The extension portion T12 may be in direct contact with the swivel substrate 56. Further, a mounting bracket made of a plate material, a block material, or the like may be fixed to the swivel substrate 56, and the extension portion T12 may be mounted directly or via an elastic plate on the mounting bracket.

The extension portion T12 extends downward from the side portion of the tank body T11 on the outer side of the machine body. In other words, it extends from the other side of the tank body T11, which is the side opposite to one side, which is the side on which the tank support plate 95 is arranged. Further, the extension portion T12 is provided at the front portion of the tank main body T11. Further, the extension portion T12 is located on the outer side (right side) of the swing cylinder C2. A suction pipe 109 and a drain pipe 110 located below the suction pipe 109 are provided in the lower portion on the back surface side of the extension portion T12 (see FIG. 8). The suction pipe 109 is a pipe for discharging the fuel in the fuel tank T1 to send the fuel to the engine E1, and the drain pipe 110 is a pipe for draining the fuel when the fuel in the fuel tank T1 is drained. ..

As shown in FIGS. 10 and 11, the support plate 111 is arranged on the outside (one side) of the tank body T11. The lower portion of the support plate 111 is arranged between the tank main body T11 and the side plate portion 96, and is fixed to the side plate portion 96. The tank body T11 is abutted against the support plate 111 via an elastic plate. The support plate 111 is arranged inside the first cover 28 of the side cover 23. The front portion of the first cover 28 is fixed to the front portion of the support plate 111 by bolts. Further, a battery bracket 112 that supports the battery B1 is attached to the upper portion of the support plate 111. The battery bracket 112 is also attached to the hydraulic oil tank T2 (see FIG. 8).

As shown in FIG. 13, a band hanging plate 113 is provided on the front portion of the support plate 111. The band hanging plate 113 is integrally formed with the support plate 111 by bending a part of the plate material forming the support plate 111. Therefore, the support plate 111 and the band hanging plate 113 are formed of a single plate material. The band hanging plate 113 has a main body plate 113a, a reinforcing plate 113b, and an extension plate 113c. The main body plate 113a extends outward from the lower part of the front end of the support plate 111. The main body plate 113a has a long groove 113d and a hooking portion 113e on the outer side of the machine body. The long groove 113d is formed by a vertically long edge portion formed through the main body plate 113a, and the hook portion 113e is a portion of the long groove 113d located on the outer side of the machine body. Further, the upper end of the main body plate 113a is formed in an inclined shape so as to move downward toward the outside of the machine body.

The reinforcing plate 113b extends outward from the upper part of the front end of the support plate 111. The reinforcing plate 113b is formed to be narrower than the main body plate 113a.
The extension plate 113c extends downward from the main body plate 113a. That is, the extension plate 113c extends below the lower end of the support plate 111. The side plate portion 96 and the bottom plate portion 97 project forward from the extension plate 113c. The extension plate 113c has a first end portion 114 that abuts on the side plate portion 96 and a second end portion 115 that abuts on the bottom plate portion 97. The first end portion 114 is welded to the side plate portion 96. The second end portion 115 is welded to the bottom plate portion 97.

As shown in FIGS. 8 and 9, the fuel tank T1 is pressed and fixed to the support plate 111 by the fixing band 116. A hook portion 116a is provided at one end of the fixing band 116. The hook portion 116a is hooked on the hook portion 113e of the band hanging plate 113. In other words, the fixed band 116 is hooked on the band hanging plate 113. A fixing bolt 117 is provided at the other end of the fixing band 116. The fixing bolt 117 is fixed to the stay 118 fixed to the lower part of the right side surface of the hydraulic oil tank T2 via the nut 119.

Next, the peripheral structure of the upper part of the hydraulic oil tank T2 will be described.
As shown in FIGS. 8, 15 and 16, the height of the upper surface of the hydraulic oil tank T2 is substantially the same as the upper surface of the battery B1 (a position slightly higher than the upper surface of the battery B1). On the upper surface of the hydraulic oil tank T2, a refueling port 120 and a refueling cap 121 that closes the refueling port 120 are provided. The refueling cap 121 is provided with a plurality of tool engaging portions 122. The plurality of tool engaging portions 122 are provided at four locations on the outer peripheral portion of the upper surface of the lubrication cap 121 at 90 ° intervals in the circumferential direction. The disconnector 123 (first position) in front of the lubrication cap 121 at a position that does not hinder the insertion of the tool into at least one tool engaging portion 122 (a position that does not overlap with the tool engaging portion 122 when viewed from the front). Electrical components) are arranged. The disconnector 123 is a battery disconnector switch that shuts off the supply current of the battery B1 in the event of an abnormality, an emergency, maintenance, or the like.

As shown in FIG. 16, the disconnector 123 is fixed to a first mounting bracket (mounting bracket) 124 fixed to the upper surface of the hydraulic oil tank T2. The first mounting bracket 124 is made of a thin plate material. The first mounting bracket 124 has a lower wall portion 124a, a vertical wall portion 124b, and a mounting wall portion 124c. The lower wall portion 124a, the vertical wall portion 124b, and the mounting wall portion 124c are formed by bending a single plate material. The lower wall portion 124a is arranged in front of the side portion of the oil supply cap 121 on the side inside the machine body, and is fixed to the upper surface of the hydraulic oil tank T2 by welding. The vertical wall portion 124b extends upward from the end portion of the lower wall portion 124a on the machine body side. Further, the vertical wall portion 124b extends in an inclined direction in which the vertical wall portion 124b shifts toward the inside of the aircraft as it goes upward from the lower wall portion 124a. The mounting wall portion 124c extends upward from the vertical wall portion 124b. The disconnector 123 is attached to the attachment wall portion 124c via the attachment plate 125. That is, the lower portion of the mounting plate 125 is fixed to the mounting wall portion 124c by bolts and nuts. Further, the disconnector 123 is fixed to the upper part of the mounting plate 125 by bolts and nuts. The disconnector 123 may be directly bolted to the mounting wall portion 124c.

As shown in FIG. 15, a slow blow fuse 126 (second electrical component) and a fuel buzzer 127 (second electrical component) are located on the front side of the refueling cap 121 and the disconnector 123 (first electrical component) and on the inside of the battery B1. The second electrical component) is arranged. The slow blow fuse 126 is a fuse having a property of not being blown by a momentary current but being blown when a large current flows continuously. The fuel buzzer 127 is a buzzer that notifies that the fuel is full when the fuel tank T1 is refueled.

According to the above configuration, since there are no obstructive parts, members, or the like in front of the refueling cap 121, the refueling cap 121 can be accessed from the front side. That is, the tool can be engaged with the tool engaging portion 122 of the refueling cap 121 from the front side, and the refueling cap 121 can be opened and closed by loosening or tightening the refueling cap 121 with respect to the refueling port 120.
As shown in FIGS. 11 and 15, the slow blow fuse 126 and the fuel buzzer 127 are attached to the second mounting bracket (mounting bracket) 128 attached to the battery bracket 112. The second mounting bracket 128 is arranged on the in-machine side of the battery B1, and the lower end side is fixed to the in-machine side of the battery bracket 112.

FIG. 17 shows a side view of the second cover 29 as viewed from the right side with the third cover 30 open. As shown in FIG. 17, the tool engaging portion 122 is located at a position lower than the edge portion 29a at the upper end of the second cover 29, and is from the upper surface of the hydraulic oil tank T2 of the fuel filler cap 121 and the fuel filler port 120. The height is suppressed to the minimum necessary height at which a screw thread for attaching to the refueling cap 121 can be formed at the refueling port 120. As a result, the manufacturing cost of the hydraulic oil tank T2 having the fuel filler port 120 can be suppressed.

In the present embodiment, the working machine 1 includes a body 2, a fuel tank T1, and a tank support plate 95 arranged on one side of the fuel tank T1 and attached to the body 2, and the fuel tank T1 is , The tank body T11 supported by the tank support plate 95 in a state of being separated upward from the machine body 2 and the other side of the tank body T11, which is the side opposite to one side, extend downward. It has an extension portion T12 supported by the machine body 2. That is, the fuel tank T1 is supported by the tank support plate 95 with respect to the airframe 2, and is also supported by the extension portion T12. Thereby, a sufficient bearing capacity for supporting the fuel tank T1 can be secured. Further, since the bearing capacity of the fuel tank T1 can be sufficiently secured, even if the capacity of the fuel tank T1 and the weight of the tank increase, the tank support plate 95 is prevented from being deformed due to insufficient strength. can do.

Further, the tank support plate 95 extends from the lower side of the side plate portion 96 arranged on the side of one side of the tank main body T11 and the lower portion of the side plate 96 toward the tank main body T11, and is one side of the tank main body T11. It has a bottom plate portion 97 that supports the portions, and a mounting plate portion 98 that extends from the upper portion of the side plate portion 96 to the side opposite to the tank body T11 side and is attached to the machine body 2. That is, one side portion of the tank body T11 is supported via the side plate portion 96, the bottom plate portion 97, and the mounting plate portion 98 of the tank support plate 95, and the other side portion of the tank body T11 is supported by the extension portion T12. The fuel tank T1 can be supported by both ends, and the supporting force of the fuel tank T1 can be sufficiently secured.

Further, the bottom plate portion 97 extends from the rear portion of the first receiving portion 100 that supports one side portion of the tank body T11 and the rear portion of the first receiving portion 100 to the side opposite to the side plate portion 96, and is the rear portion of the tank body T11. It has a second receiving portion 101 that supports the above. Thereby, the tank body T11 can be supported in a wide range.
Further, the support plate 111, which is arranged on one side of the tank body T11 and whose lower portion is fixed to the side plate 96 of the tank support plate 95, and the tank body T11 are pressed against the support plate 111 to fix them. It includes a fixing band 116 and a band hanging plate 113 which is formed by bending a plate material forming a support plate 111 and to which one end of the fixing band 116 is hooked. In this way, the strength of the band hanging plate 113 can be ensured by forming the band hanging plate 113 by bending a part of the plate material forming the support plate 111. As a result, the strength of the band hanging plate 113 can be improved as compared with the case where the band hanging plate 113 is attached to the support plate 111 by welding or the like.

Further, the band hanging plate 113 has an extension plate 113c extending from the support plate 111 toward the other side portion of the tank body T11 and extending below the lower end of the support plate 111 at the lower portion. The extension plate 113c has a first end 114 welded to the side plate 96 and a second end 115 welded to the bottom plate 97. That is, the tank is supported by welding the first end 114 of the extension plate 113c of the band hanging plate 113 formed by bending the plate material to the side plate 96 and the second end 115 to the bottom plate 97. The strength of the plate 95 can be improved. As a result, the tank bearing capacity of the bottom plate portion 97 is improved. In addition, the strength of the band hanging plate 113 is also improved. By increasing the strength of the tank support plate 95 and the band hanging plate 113, it is possible to increase the capacity and weight of the fuel tank T1.

Further, the hydraulic oil tank T2 to which the oil supply cap 121 having the tool engaging portion 122 is detachably mounted, the mounting bracket 124 (first mounting bracket) fixed to the upper surface of the hydraulic oil tank T2, and the mounting bracket 124 The mounting bracket 124 includes the mounted first electrical component (disconnector 123), and the mounting bracket 124 has a lower wall portion 124a fixed to the upper surface of the hydraulic oil tank T2 and an inner wall portion 124a in the width direction of the machine body as it goes upward from the lower wall portion 124a. It has a vertical wall portion 124b extending in an inclined direction that shifts toward the direction, and a mounting wall portion 124c extending upward from the vertical wall portion 124b to which the first electrical component is attached. The mounting bracket 124 is arranged in front of the axis of the oil supply cap 121 and inward in the width direction of the machine body with respect to the tool engaging portion 122. That is, by arranging the first electrical component at a position that does not hinder the insertion of the tool into the tool engaging portion 122, an access path for accessing the refueling cap 121 from the front side can be secured. Conventionally, since the mounting bracket that supports the first electrical component is hung from the first electrical component and fixed to the upper surface of the hydraulic oil tank, the mounting bracket may interfere with the wiring of the harness or the like. On the other hand, in the present embodiment, the mounting bracket is provided with a vertical wall portion 124b extending in an inclined direction that shifts inward in the width direction of the machine body as it goes upward from the lower wall portion 124a toward the mounting wall portion 124c. There is. As a result, it is possible to secure a distribution route (wiring route) for a distribution member (wiring member) such as a harness on the lower side of the first electrical component.

Further, the battery B1 is arranged in front of the hydraulic oil tank T2 and at a position where the height of the upper surface is lower than the tool engaging portion 122, and the second mounting bracket is arranged inward in the body width direction of the battery B1. The second electrical component (slow blow fuse 126) provided with 128 and mounted on the second mounting bracket 128 and arranged in front of the first electrical component (disconnector 123) and inward in the body width direction of the battery B1. , Fuel buzzer 127). That is, by arranging the second electrical component on the inside of the battery B1, it is possible to secure an access route for accessing the refueling cap 121 from the front side.

Conventionally, the slow blow fuse and fuel buzzer are attached to the mounting bracket on the front side of the refueling cap, which hinders the slow blow fuse and fuel buzzer and mounting bracket from accessing the refueling cap from the front side. Was there. Therefore, conventionally, the tool is engaged with the tool engaging portion of the refueling cap from the right side. To allow the refueling cap to be loosened or tightened from the right, the tool engagement must project above the edge of the top edge of the second cover. Therefore, it is necessary to increase the height of the refueling cap and the refueling port, which leads to an increase in weight and cost.

In the present embodiment, since the refueling cap 121 can be accessed from the front, it is not necessary to match the heights of the refueling cap 121 and the refueling port 120 with the height of the second cover 29, and the refueling cap 121 and the refueling port 120 The height can be suppressed to the minimum height. As a result, weight and cost can be reduced.
Further, in the present embodiment, since the slow blow fuse 126 and the fuel buzzer 127 are attached to the second mounting bracket 128 which is a mounting member different from the first mounting bracket 124, the shape of the first mounting bracket 124 is simplified. .. Further, the dimension of the first mounting bracket 124 in the body width direction K2 is also thin. This facilitates the handling of wiring members such as harnesses that are wired (arranged) in the vicinity of the first bracket.

Next, the inside / outside air switching device 136 for selectively taking in the inside air and the outside air into the air conditioner 37 and the outside air introducing device 137 for introducing the outside air into the inside / outside air switching device 136 will be described.
As shown in FIGS. 18 and 19, the seat base 31 that supports the driver's seat 6 has a seat support frame 138 and an opening / closing cover 139 that rotatably covers the front side (one side) of the seat support frame 138. The seat support frame 138 is a plurality of connecting frame materials (first frame material) for connecting the upper plate 140, the lower plate 141 arranged below the upper plate 140 at intervals, and the upper plate 140 and the lower plate 141. 142A, 2nd frame material 142B, 3rd frame material 142C, 4th frame material 142D). The seat support frame 138 has a space between the upper plate 140 and the lower plate 141 on which the air conditioner 37, other equipment, parts, and the like can be arranged. That is, the air conditioner 37 and the like can be accommodated in the seat support frame 138.

The upper plate 140 has a seat mounting portion 140a to which the driver's seat 6 is mounted, a first mounting portion 140b to which the left control device 33L is mounted, and a second mounting portion 140c to which the right control device 33R is mounted. The seat mounting portion 140a is provided at the center of the upper plate 140 in the body width direction K2. The first mounting portion 140b is provided on the left side portion of the upper plate 140. The second mounting portion 140c is provided on the right side portion of the upper plate 140. On the front surface of the upper plate 140, a first anti-vibration material 143 located on the left side of the seat mounting portion 140a and a second anti-vibration material 144 located on the right side of the seat mounting portion 140a are provided.

The first frame member 142A supports the left end portion and the rear end portion of the first mounting portion 140b. The second frame member 142B supports the front portion on the right side of the first mounting portion 140b. The third frame member 142C supports the front portion on the left side of the second mounting portion 140c. The fourth frame member 142D supports the left and right rear portions of the second mounting portion 140c and the front-rear halfway portion of the second mounting portion 140c.
The opening / closing cover 139 is made of a plate material, and is formed to have a lateral width extending from one end to the other end of the seat support frame 138 in the body width direction K2. A notch 146 for inserting the air supply duct 145 from the seat support frame 138 is formed in the upper part on the right side of the opening / closing cover 139. The air supply duct 145 is a duct that guides the conditioned air supplied from the air conditioner 37, and is connected to the air blower 147 provided at the front of the control device 33R on the right side.

Further, the opening / closing cover 139 is pivotally supported around the horizontal axis by the first hinge 148A and the second hinge 148B. The first hinge 148A is provided at the lower end of the second frame member 142B. The second hinge 148B is provided at the lower end of the third frame member 142C. Therefore, the opening / closing cover 139 is swingably connected to the seat support frame by the first hinge 148A and the second hinge 148B to the seat support frame 138, and swings up and down to be swingable.

Further, the opening / closing cover 139 has a lock member 149, a first opening groove 150, and a second opening groove 151. The lock member 149 is provided on the upper portion of the central portion of the opening / closing cover 139. The lock member 149 is a component operated by a key, and locks the open / close cover 139 in a closed state by engaging with an engagement groove (not shown) provided in the upper plate 140. Therefore, when the lock member 149 is unlocked by key operation, the open / close cover 139 can be opened without a tool. The opening / closing cover 139 is pressed against the first vibration-proof material 143 and the second vibration-proof material 144 in a closed state to be vibration-proof.

The first opening groove 150 is formed by a rectangular and horizontally long groove formed through the opening / closing cover 139. The first opening groove 150 is provided below the driver's seat 6 in the middle of the upper and lower parts of the opening / closing cover 139. The second opening groove 151 is formed by a rectangular and vertically long groove formed through the opening / closing cover 139. The second opening groove 151 is provided in the lower part on the right side of the opening / closing cover 139.

An air conditioner 37 is provided inside the seat support frame 138 on the left side between the seat mounting portion 140a and the lower plate 141. That is, the seat support frame 138 is a member that accommodates the air conditioner 37.
As shown in FIGS. 19 and 20, an inside / outside air switching device 136 is provided on the right side of the air conditioner 37. The inside / outside air switching device 136 is provided in the seat support frame 138 on the right side between the seat mounting portion 140a and the lower plate 141. An outside air introduction device 137 is provided on the right side of the seat base 31. The outside air introduction device 137 and the inside / outside air switching device 136 are connected by a connection duct 152.

As shown in FIG. 20, a fan accommodating portion 153 in which a blower fan is accommodated is provided at the rear portion of the air conditioner 37. At the front of the air conditioner 37, an apparatus main body 154 in which a heat exchanger is housed is provided. Air is sucked into the fan accommodating portion 153 from the right side portion by the blower fan, and the sucked air is sent to the apparatus main body portion 154 and heated by the heat exchanger.

As shown in FIG. 20, a first blowing portion 155 for blowing out conditioned air is provided on the front surface portion of the apparatus main body portion 154. The first blowing portion 155 corresponds to the first opening groove 150 in a state where the opening / closing cover 139 is closed (see FIG. 18). Therefore, the conditioned air blown out from the first blowing portion 155 is blown into the cabin 5 through the first opening groove 150. Further, a second blowout portion 156 is provided on the upper part of the right side surface of the apparatus main body portion 154. The air supply duct 145 shown in FIG. 18 is connected to the second outlet 156.

As shown in FIGS. 21 to 24, the inside / outside air switching device 136 includes a switching box 157, an operating shaft 158, a switching member 159, an operating member 160, and a switching spring 161. The switching box 157 has a box main body 162 and a cover plate 163.
As shown in FIG. 23, the box body 162 has a bottom portion (third plate) 162a. In this embodiment, the bottom portion 162a is composed of a part of the lower plate 141. Further, the box main body 162 has a first vertical plate (first plate) 164 and a second vertical plate (second plate) 165 facing the first vertical plate 164. The first vertical plate 164 and the second vertical plate 165 are erected on the lower plate 141. The box body 162 has an upper end opening (one end opening) 166 in which an opening (between one ends) between the upper end (one end) 164a of the first vertical plate 164 and the upper end (one end) 165a of the second vertical plate 165 is opened. Have. The first vertical plate 164 and the second vertical plate 165 (the box body 162) have a front region formed along the front-rear direction K1 and toward the inside of the aircraft (air conditioner 37 side) as the rear region moves backward. It is formed along the direction of inclination that shifts to. Further, the first vertical plate 164 and the second vertical plate 165 face each other with the front region facing K2 in the width direction of the machine body at a substantially constant interval, and the distance between the first vertical plate 164 and the second vertical plate 165 increases as the rear region faces the air conditioner 37 side. They are facing each other so as to be.

As shown in FIGS. 21 and 23, a first spring hooking portion 167 is provided on the upper portion (upper end portion 164a side) of the first vertical plate 164. The first spring hooking portion 167 is provided on the rear region side in the front region of the first vertical plate 164. One end (rear end) of the switching spring 161 is hooked on the first spring hooking portion 167. The switching spring 161 is composed of a coil spring. The first spring hooking portion 167 has an upper wall 167a extending from the upper end of the first vertical plate 164 toward the inside of the machine, and a rear wall 167b extending downward from the rear end of the upper wall 167a. .. A spring hook hole 167c through which one end of the switching spring 161 is inserted is formed on the left side of the front portion of the upper wall 167a. The spring hole 167c is formed by an annular edge formed through the upper wall 167a. The other end (front end) of the switching spring 161 is hooked on the second spring hooking portion 185 formed on the operating member 160.

As shown in FIGS. 23 and 25, a support groove 168 is formed in the upper portion (one end side) of the first vertical plate 164. The support groove 168 is open on the upper end (one end) side of the first vertical plate 164, and is formed from the upper end (one end) of the first vertical plate 164 toward the lower side. Further, the support groove 168 is provided in front of the first spring hooking portion 167. One end side (left end side) of the operation shaft 158 is inserted into the support groove 168 from above (the opening on the upper end side of the first vertical plate 164). The groove bottom 168a of the support groove 168 is formed in an arc shape, and one end side of the operation shaft 158 is supported (axially supported) by the groove bottom 168a. Therefore, the groove bottom 168a of the support groove 168 is a pivotal portion that pivotally supports one end side of the operation shaft 158. The support groove 168 is an inclined elongated groove that moves away from the first spring hooking portion 167 as it goes from the groove bottom 168a toward the groove opening edge 168b (as it goes upward). Further, the groove edge portion 168c on the upper side of the support groove 168 is a receiving surface which is a portion receiving an urging force acting on the operation shaft 158. The groove edge portion 168c is formed in an inclined shape so as to move away from the first spring hooking portion 167 as it goes from the groove bottom 168a toward the groove opening edge 168b (as it goes upward).

As shown in FIGS. 23 and 24, an outside air intake port 169 for introducing outside air is provided in the switching box 157 at the front portion of the second vertical plate 165. The outside air intake port 169 is formed by a tubular body, and one end side penetrates the second vertical plate 165 and is inserted into the box body 162. The inside-machine side (one end side) of the connection duct 152 shown in FIG. 20 is connected to the outside air intake port 169. In the front region of the second vertical plate 165, there is a shaft support portion 170 that inserts and supports the other end side (right end side) of the operation shaft 158. The shaft support portion 170 is composed of an annular edge portion formed through the second vertical plate 165. The shaft support portion 170 is formed so as to correspond to the groove bottom 168a (axial support portion) of the support groove 168 in the body width direction K2. In other words, the shaft support portion 170 and the groove bottom 168a of the support groove 168 are formed in a coaxial center shape. By pivotally supporting one end side of the operation shaft 158 to the support groove 168 and pivotally supporting the other end side to the shaft support portion 170, the operation shaft 158 is located between the upper portions of the first vertical plate 164 and the second vertical plate 165 (one end). Supported across departments).

Further, a locking piece 171 extending upward is provided at the upper end of the front region of the second vertical plate 165. A locking groove 172 is formed in the locking piece 171. The locking piece 171 is provided behind the shaft support 170.
As shown in FIGS. 21 and 23, the box main body 162 has a front vertical plate (fourth plate) 173 that closes between the front ends of the first vertical plate 164 and the second vertical plate 165. A first fixed piece 174 extending rearward is provided at the upper end of the front vertical plate 173. As shown in FIGS. 21 and 23, the box main body 162 has a rear vertical plate (fifth plate) 175 that closes between the rear ends of the first vertical plate 164 and the second vertical plate 165. After this, the plate surface of the vertical plate 175 faces the inside of the machine (the fan accommodating portion 153 side shown in FIG. 20). The rear vertical plate 175 is formed with a communication port 177 (an annular edge formed through the rear vertical plate 175) that communicates with the fan accommodating portion 153. The box body 162 communicates with the air conditioner 37 through the communication port 177. Further, at the upper end of the rear vertical plate 175, a second fixed piece 176 extending toward the outside of the machine body is provided.

As shown in FIGS. 23 and 24, the box body 162 has a partition plate 178 in the front region. The partition plate 178 is arranged between the first vertical plate 164 and the second vertical plate 165, and divides the inside of the box main body 162 into a room on the outside air intake 169 side and a room on the communication port 177 side. There is. The partition plate 178 has an inclined wall 178a and a lower wall 178b. The inclined wall 178a extends in an inclined direction in which the inclined wall 178a shifts downward from between the upper ends of the first vertical plate 164 and the second vertical plate 165 toward the rear. The lower wall 178b extends downward from the lower end of the inclined wall 178a and is connected to the lower plate 141 (bottom 162a of the box body 162). An outside air intake port 179 is formed on the lower side of the inclined wall 178a. The outside air intake 179 is composed of an annular opening edge formed through the inclined wall 178a. The outside air introduced into the box body 162 passes through the outside air intake port 179, flows to the communication port 177, and is taken into the air conditioner 37. That is, the outside air intake port 179 is an opening for taking in the outside air introduced into the box main body 162 into the air conditioner 37.

As shown in FIG. 23, the upper end portion 164a of the first vertical plate 164, the upper end portion 165a of the second vertical plate 165, the upper end portion 173a of the front vertical plate 173, and the upper end portion 175a of the rear vertical plate 175 form the upper end of the box body 162. An opening 166 is formed.
As shown in FIGS. 21 and 22, the cover plate 163 is a lid member that closes the upper end opening 166 of the box body 162. The cover plate 163 is bolted to the first fixing piece 174 and the second fixing piece 176 in a state where the upper end opening 166 of the box body 162 is closed. Further, in the middle portion of the cover plate 163, a locking portion 180 which is inserted into the locking groove 172 from the left side and locked to the locking piece 171 is provided.

The cover plate 163 is formed with an inside air intake port 181 for taking inside air into the air conditioner 37 through the box body 162. The inside air intake 181 is composed of a plurality of long grooves (opening edges) 181a. The long groove 181a is formed by an elongated hole-shaped edge formed through the cover plate 163, and is formed in a long rectangular shape in the body width direction K2. In the present embodiment, the inside air intake 181 is configured by arranging six elongated grooves 181a side by side in the front-rear direction. The inside air intake 181 is not limited to being composed of a plurality of elongated grooves 181a. That is, it may be composed of a single opening edge.

Further, the inside air intake port 181 is located in the middle portion (rear side of the front region) of the cover plate 163. Further, the inside air intake port 181 is located behind the partition plate 178 with the cover plate 163 closed. Therefore, the inside air intake port 181 takes in the inside air to the rear side of the partition plate 178 in the box body 162. The inside air taken into the box body 162 is taken into the air conditioner 37 via the communication port 177.

As shown in FIG. 22, the cover plate 163 has a retaining portion 182 on the side (left side) inside the machine. The retaining portion 182 regulates the axial movement of the member that retains the operating shaft 158, that is, the operating shaft 158, and prevents the operating shaft 158 from falling off from the shaft support portion 170 of the second vertical plate 165. It is a member to be used. The retaining portion 182 is formed by bending a part of the plate material constituting the cover plate 163 downward. That is, the retaining portion 182 extends downward from the left edge portion of the cover plate 163. Further, the retaining portion 182 is located on the front side of the inside air intake port 181. Further, the retaining portion 182 is located in front of the first spring hooking portion 167 with the cover plate 163 closed. The retaining portion 182 is formed with a relief hole 183 for releasing one end side of the operation shaft 158. The relief hole 183 is formed by an annular edge formed through the retaining portion 182.

In the present embodiment, the box body 162 has an upper end opening 166, and the cover plate 163 is a member that closes the upper end opening 166, but the present invention is not limited thereto. For example, the opening (one end opening) of the box body 162 closed by the cover plate 163 may be opened forward, backward, or downward, or may be opened toward the left or right. Good.

As shown in FIG. 23, the operating member 160 is composed of a lever member, and one end side of the operating shaft 158 is fixed to one end (base 160a) of the operating member 160. Therefore, the operating member 160 can rotate the operating shaft 158 around the axis. One end side of the operating shaft 158 penetrates the operating member 160 and projects to the left. A grip 184 is provided at the other end (tip) of the operating member 160. A second spring hooking portion 185 on which the other end (front end) of the switching spring 161 is hooked is integrally formed in the middle portion of the upper portion of the operating member 160. The second spring hooking portion 185 is formed with a U-shaped groove 185a for hooking the other end of the switching spring 161 (see FIG. 22).

As shown in FIG. 23, the switching member 159 is fixed to the operation shaft 158. The switching member 159 is a member that selectively closes the inside air intake port 181 and the outside air intake port 179. The switching member 159 includes a plate member 159a, a first contact member 159b, and a second contact member 159c. The plate member 159a constitutes a core body of the switching member 159, and is composed of a rectangular plate material. One end of the plate member 159a in the plate surface direction is fixed to the operation shaft 158 along the axial direction. The first contact member 159b and the second contact member 159c are formed of an elastic plate material such as a rubber plate. The first contact member 159b is overlapped and fixed to the plate surface on one surface side (upper side) of the plate member 159a. The second contact member 159c is overlapped and fixed on the plate surface on the other surface side (lower side) of the plate member 159a.

The operation shaft 158 is pivotally supported by the box body 162 with the operation member 160 and the switching member 159 fixed. In order to attach the operation shaft 158, the operation member 160 and the switching member 159 to the box body 162, first, the switching member 159 is arranged on the rear side of the partition plate 178 in the box body 162. Next, the other end side of the operation shaft 158 is inserted into the shaft support portion 170 from the inside of the box body 162. After that, one end side of the operating shaft 158 is inserted into the support groove 168 from above. At this time, the operation member 160 is positioned on the outer surface side of the box main body 162 (the outer surface side of the first vertical plate 164). As a result, the operation shaft 158, the operation member 160, and the switching member 159 can be easily attached to the box body 162. With the operating shaft 158, operating member 160, and switching member 159 attached to the box body 162, the switching member 159 is located between the inside air intake 181 and the outside air intake 179.

The cover plate 163 is assembled to the box body 162 with the operation shaft 158, the operation member 160, and the switching member 159 attached to the box body 162. When assembling the cover plate 163, the retaining portion 182 is positioned on the side (left side) opposite to the first vertical plate 164 with respect to the base portion 160a of the operating member 160 (see FIG. 22). That is, the retaining portion 182 is arranged so as to face the first vertical plate 164 via the base portion 160a of the operating member 160. As a result, the retaining portion 182 restricts the axial movement of the operating member 160 and the operating shaft 158, and the operating shaft 158 is retracted. After that, the switching spring 161 is hooked on the first spring hooking portion 167 and the second spring hooking portion 185.

As shown in FIG. 24, the switching member 159 is switched between the first switching position 186 shown by a virtual line and the second switching position 187 shown by a solid line by rotating the operation shaft 158 around the axis. The first switching position 186 is a position for closing the inside air intake port 181. That is, at the first switching position 186, the switching member 159 (first contact member 159b) abuts on the lower surface of the cover plate 163 so as to close the inside air intake port 181. As a result, the outside air introduced into the box body 162 from the outside air intake port 169 passes through the outside air intake port 179 and is taken into the air conditioner 37. That is, the first switching position 186 is a position where the outside air is taken into the air conditioner 37.

The second switching position is a position where the outside air intake port 179 is closed. That is, at the second switching position 187, the switching member 159 (second contact member 159c) abuts on the upper surface of the partition plate 178 so as to close the outside air intake port 179. As a result, the inside air passes through the inside air intake port 181 and is taken into the air conditioner 37. That is, the second switching position 187 is a position where the inside air is taken into the air conditioner 37.

As shown in FIG. 24, in the state where the switching member 159 is located at the first switching position 186, the operating member 160 is pushed down as shown by a virtual line. In this state, the axis of the switching spring 161 is located below the axis of the operating shaft 158. Therefore, the urging force of the switching spring 161 acts in the direction of pulling down the operating member 160 (the direction of holding the switching member 159 at the first switching position 186). By this urging force, the switching member 159 is held at the first switching position 186.

Further, in the state where the switching member 159 is located at the second switching position 187, as shown by the solid line,
The operating member 160 is pulled up. In this state, the axis of the switching spring 161 is located above the axis of the operating shaft 158. Therefore, the urging force of the switching spring 161 acts in the direction of pulling up the operating member 160 (the direction of holding the switching member 159 at the second switching position 187). By this urging force, the switching member 159 is held at the second switching position 187.

As described above, the switching spring 161 urges the switching member 159 to the first switching position 186 side and the switching member 159 to the second switching position 187 side by operating the operation shaft 158. The urging force is switched to the state. That is, when the axis of the switching spring 161 is positioned below the axis of the operating shaft 158 by operating the operating member 160, the urging force of the switching spring 161 is in the direction of pulling down the operating member 160 (the switching member 159 is set to the first position). 1 It acts in the direction of urging the switching position 186 side). Further, when the axis of the switching spring 161 is positioned above the axis of the operating shaft 158 by operating the operating member 160, the urging force of the switching spring 161 is in the direction of pulling up the operating member 160 (the switching member 159 is set to the first position). 2 It acts in the direction of urging the switching position 186 side).

Next, the outside air introduction device 137 will be described.
As shown in FIGS. 19, 20, and 26, the outside air introduction device 137 has a filter 188, a filter insertion portion 189 into which the filter 188 is detachably inserted, and an outside air introduction duct 190 into which the outside air is introduced. ..
The filter 188 is a filter 188 that removes dust from the outside air. The outside air from which dust has been removed by this filter 188 is sent to the inside / outside air switching device 136. Therefore, the filter 188 is a filter 188 that removes dust from the outside air before it is taken into the box body 162. The filter 188 is formed in a rectangular parallelepiped and is elastically deformable.

As shown in FIGS. 19 and 20, the filter insertion portion 189 is arranged on the right end side in the seat support frame 138. As shown in FIG. 26, the filter insertion portion 189 includes a side wall 189a, an upper wall 189b extending outward from the upper end of the side wall 189a, and a lower wall extending outward from the lower end of the side wall 189a. It has a rear wall 189c and a rear wall 189d extending downward from the rear end of the side wall 189a. The space between the front ends of the upper wall 189b and the lower wall 189c is open toward the front. The opening portion between the front end portion of the upper wall 189b and the lower wall 189c is covered with the opening / closing cover 139 from the front. The filter 188 can be inserted into the filter insertion portion 189 from this open portion. Therefore, the filter 188 is mounted on the seat insertion portion 189 provided in the seat support frame 138 so as to be removable from the front side (one side) of the seat support frame 138.

As shown in FIG. 27B, with the filter 188 inserted all the way into the filter insertion portion 189, the front end side of the filter 188 projects from the filter insertion portion 189 toward the opening / closing cover 139 side (front). Then, the open / close cover 139 presses the filter 188 in the closed state in the direction of inserting the filter 188 into the filter insertion portion 189.
As shown in FIG. 26, the upper wall 189b is formed with an arc-shaped notch 189e recessed from the front to the rear. The notch 189e has the effect that when the filter 188 is taken out from the filter insertion portion 189, it is easy to put a finger or the like on the filter 188. At the lower part of the side wall 189a, a tubular connecting portion 191 communicating with the inside of the filter inserting portion 189 is provided. As shown in FIGS. 27A and 27B, the connection portion 191 is connected to the outer side (the other end side) of the body of the connection duct 152.

As shown in FIG. 18, the outside air introduction duct 190 is arranged between the filter 188 (filter insertion portion 189) and the second side surface portion 39 of the cabin 5.
As shown in FIG. 26, the outside air introduction duct 190 has a duct main body 192 and a duct lid 193. The duct main body 192 extends forward from the first side wall 192a, the front wall 192b extending outward from the front end of the first side wall 192a, and the outer side end (right end) of the front wall 192b. It has a mounting wall 192c to be mounted and a rear wall 192d extending outward from the rear end of the first side wall 192a. The right end of the upper wall 189b of the filter insertion portion 189 and the right end of the lower wall 189c are joined to the first side wall 192a. A communication portion 194 that communicates the inside of the outside air introduction duct 190 and the inside of the filter insertion portion 189 is formed in the lower part of the first side wall 192a. The communication portion 194 is formed by an annular edge portion penetrating the first side wall 192a. Mounting wall 192c
Is attached to the lower part of the second side surface portion 39 by bolts 192e and 192f (see FIG. 27B).

As shown in FIGS. 26, 27A, and 27B, the duct lid 193 extends toward the inside of the machine body from the first side wall 192a, the second side wall 193a facing the machine body width direction K2, and the upper end of the second side wall 193a. It has an upper wall 193b and a lower wall 193c extending from the lower end of the second side wall 193a toward the inside of the aircraft. The upper wall 193b covers between the upper ends of the front wall 192b and the rear wall 192d. The lower wall 193c covers between the upper ends of the front wall 192b and the rear wall 192d. At the upper part of the second side wall 193a, a communication port 195 that communicates with the outside air introduction port 46 formed in the second side surface portion 39 is provided. The communication port 195 is composed of a plurality of long grooves 195a that are long in the front-rear direction and are formed so as to penetrate the second side wall 193a. The second side wall 193a is provided with a plurality of eaves 196 extending in an inclined direction extending downward from the upper edge of each elongated groove 195a toward the outside of the machine body.

In the above-mentioned outside air introduction device 137, outside air flows into the outside air introduction duct 190 through the outside air introduction port 46 and the communication port 195. The outside air that has flowed into the outside air introduction duct 190 flows into the filter insertion portion 189 via the communication portion 194. The outside air flowing into the filter insertion portion 189 is introduced into the switching box 157 through the filter 188 and through the connecting portion 191 and the connecting duct 152.

In the present embodiment, the working machine 1 includes a cabin 5, an air conditioner 37 that air-conditions the inside of the cabin 5, a first plate (first vertical plate) 164, and a second plate (first plate) facing the first plate 164. It has two vertical plates) 165 and one end opening (upper end opening 166) that is open between one end (upper end 164a) of the first plate 164 and one end (upper end 165a) of the second plate 165. It was rotatably supported by the box body 162 communicating with the air conditioner 37, the cover plate 163 that closes one end opening (upper end opening 166) of the box body 162, and the first plate 164 and the second plate 165. The first switching position 186 and the air conditioner that are arranged in the operation shaft 158 and the box body 162, are fixed to the operation shaft 158, and take in the outdoor air of the cabin 5 into the air conditioner 37 by rotating the operation shaft 158. 37 is provided with a switching member 159 that can be switched to a second switching position 187 that takes in the air in the cabin 5 and an operating member 160 that is fixed to one end side of the operating shaft 158 and rotates the operating shaft 158. The cover plate 163 has a retaining portion 182 that faces through at least a part of the operating member 160 and restricts the axial movement of the operating member 160 and the operating shaft 158 to retain the operating shaft 158.

According to the above configuration, since the cover plate 163 has a retaining portion 182 for retaining the operating shaft 158, the bracket for pivotally supporting the operating shaft and the operating shaft are retracted as in the above-mentioned prior art. Since it is not necessary to separately provide a retaining member for the purpose, the number of parts can be reduced. Further, since the operation shaft 158 can be removed by attaching the cover plate 163 to the box body 162, the bracket and the operation shaft for pivotally supporting the operation shaft can be removed as in the above-mentioned prior art. Since it is not necessary to carry out the work of attaching the retaining member for the purpose, the manufacturing process can be simplified. As a result, the manufacturing cost of the working machine provided with the inside / outside air switching mechanism can be reduced.

Further, the retaining portion 182 is formed by bending a part of the plate material forming the cover plate 163. Thereby, the retaining portion 182 can be easily formed.
Further, the first plate (first vertical plate) 164 has a support groove 168 that is open to one end (upper end 164a) side of the first plate 164 and pivotally supports one end side of the operation shaft 158. The second plate (second vertical plate) 165 has a shaft support portion 170 that is formed through the second plate 165 and pivotally supports the other end side of the operation shaft 158.

According to the above configuration, with the switching member 159 fixed to the operation shaft 158, the other end side of the operation shaft 158 is inserted into the shaft support portion 170, and one end side of the operation shaft 158 is inserted into the support groove 168. Therefore, the operation shaft 158 and the switching member 159 can be attached. As a result, the operation shaft 158 and the switching member 159 can be easily attached.
Further, a first spring hooking portion 167 provided at one end (upper end portion 164a) of the first plate (first vertical plate) 164, a second spring hooking portion 185 provided on the operating member 160, and a first spring. A switching spring 161 hooked on the hooking portion 167 and the second spring hooking portion 185 is provided, and the support groove 168 is located between the first spring hooking portion 167 and the second spring hooking portion 185, and the groove bottom 168a is provided. It has a receiving surface (groove edge portion 168c) that is formed in an inclined shape that shifts away from the first spring hooking portion 167 toward the groove opening edge 168b and that the operation shaft 158 abuts, and the operation member 160. By operating, the switching member 159 is urged to the first switching position 186 side by the switching spring 161 and the switching member 159 is urged to the second switching position 187 side by the switching spring 161. Switch. As a result, the urging force F1 (see FIG. 25) of the switching spring 161 is applied in the direction (right angle or an angle close to a right angle) intersecting the receiving surface (groove edge portion 168c) regardless of the operating angle of the operating member 160. Therefore, it is possible to prevent the operation shaft 158 from coming off the support groove 168.

Further, in the state where the switching member 159 is arranged at the first switching position 186, the urging force of the switching spring 161 acts in the direction of holding the switching member 159 at the first switching position 186, and the switching member 159 is moved to the second switching position 187 side. In the state of being arranged in, the urging force of the switching spring 161 acts in the direction of holding the switching member 159 at the second cutting position 187. As a result, it is possible to prevent the operation shaft 158 from being unintentionally pulled out of the support groove 168 due to an external force such as vibration.

Further, the outdoor air of the cabin 5 which is arranged between the first plate (first vertical plate) 164 and the second plate (second vertical plate) 165 and introduced into the box main body 162 is sent to the air conditioner 37. A partition plate 178 formed with an outside air intake port 169 for taking in is provided, and a cover plate 163 has an inside air intake port 181 for taking in the air in the cabin 5 through the box body 162 and into the air conditioner 37, and is switched. At the first switching position 186, the member 159 opens the outside air intake 169 to close the inside air intake 181, and at the second switching position 187 opens the inside air intake 181 to close the outside air intake 169. As a result, it is possible to appropriately switch between the first switching position 186 and the second switching position 187.

Further, the aircraft 2 on which the cabin 5 is mounted, the driver's seat 6 arranged in the cabin 5, and the seat support frame 138 provided on the aircraft 2 to support the driver's seat 6 and accommodate the air conditioner 37. An opening / closing cover 139 that freely opens and closes one side of the seat support frame 138, a filter 188 that removes dust from the air outside the cabin 5 before being incorporated into the box body 162, and a seat support frame 138. The filter 188 is provided with a filter insertion portion 189 that is detachably attached from one side of the seat support frame 138, and a part of the filter 188 is removed from the filter insertion portion 189 when the opening / closing cover 139 is opened. When the open / close cover 139 is closed, the open / close cover 139 comes into contact with the filter 188 and presses the filter 188 in the direction of inserting the filter 188 into the filter insertion portion 189. As a result, the cover that closes the take-out port for taking out the filter 188 can also be used as the opening / closing cover 139, and the number of members can be reduced and the number of assembly steps can be reduced.

Further, since the filter 188 can function as a vibration isolator for suppressing the vibration of the opening / closing cover 139 due to the vibration of the machine body 2, the vibration isolator for performing vibration isolation on one end side of the opening / closing cover 139 is omitted. be able to. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced.
Next, the traveling frame 9 will be described.

As shown in FIG. 28, the traveling frame 9 has a center frame 203, a first side frame 204L provided on the left side of the center frame 203, and a second side frame 204R provided on the right side of the center frame 203. .. The machine body 2 is rotatably supported by the center frame 203 via a swivel bearing 8. The traveling mechanism 10 shown in FIG. 1 is mounted on the first side frame 204L and the second side frame 204R.

The swivel bearing 8 has an outer ring 205, an inner ring 206 rotatably provided around the center of the swivel axis on the inner peripheral side of the outer ring 205, and an inner peripheral gear portion 207 formed on the inner peripheral side of the inner ring 206. As shown in FIG. 31, the outer ring 205 is bolted to the swivel substrate 56. That is, the outer ring 205 is attached to the body 2. The inner ring 206 is bolted to the center frame 203.

As shown in FIG. 28, a pinion 208 is attached to the swivel motor M2. The pinion 208 is driven by a swivel motor M2 and rotates about an axis. The pinion 208 meshes with the inner peripheral gear portion 207. Therefore, when the pinion 208 is driven by the swivel motor M2, the pinion 208 moves in the circumferential direction of the swivel bearing 8 while meshing with the inner peripheral gear portion 207. As a result, the machine body 2 rotates around the turning axis X1. The swivel joint 209 is arranged on the center side of the swivel bearing 8, that is, at the position of the swivel axis X1. The swivel joint 209 is a rotary joint that enables the supply and discharge of hydraulic oil between the hydraulic actuator on the traveling device 3 side and the control valve V1 on the machine body 2.

As shown in FIG. 31, the swivel joint 209 has an outer sleeve 210 and an inner shaft 211. The inner shaft 211 is rotatably inserted into the outer sleeve 210 around the vertical axis. The rotation axis of the inner shaft 211 and the rotation axis X1 coincide with each other. The outer sleeve 210 has a first fixing portion 212 and a second fixing portion 213 on the upper portion. The first fixing portion 212 projects in one direction (forward) in the horizontal direction. The second fixing portion 213 projects to the other (rear) in the horizontal direction opposite to one. An engaging plate 214 that engages with the swivel board 56 and rotates integrally with the swivel board 56 is fixed to the inner shaft 211.

As shown in FIGS. 28, 29, and 31, the center frame 203 has a central frame portion 215 and four support legs 216A to 216D extending from the central frame portion 215. The central frame portion 215 has a top plate 217, a bottom plate 218, a front plate 219, a rear plate 220, a left side plate 221L, and a right side plate 221R. The top plate 217 is located above the bottom plate 218. In other words, the bottom plate 218 is provided below the top plate 217 at intervals. The bottom plate 218 has an opening 222 formed at an edge penetrating the bottom plate 218. The opening 222 is closed by a lid plate 223. The swivel joint 209 can be inserted into the center frame 203 (between the top plate 217 and the bottom plate 218) through the opening 222. The front plate 219 is arranged between the front ends of the top plate 217 and the bottom plate 218, and connects the top plate 217 and the bottom plate 218. The rear plate 220 is arranged between the rear ends of the top plate 217 and the bottom plate 218, and connects the top plate 217 and the bottom plate 218. The left side plate 221L is arranged between the top plate 217 and the left end of the bottom plate 218 and connects the top plate 217 and the bottom plate 218. The right side plate 221R is arranged between the top plate 217 and the right end of the bottom plate 218 and connects the top plate 217 and the bottom plate 218.

The support legs 216A and 216B connect the central frame portion 215 and the first side frame 204L. The support legs 216C and 216D connect the central frame portion 215 and the second side frame 204R.
As shown in FIG. 28, the inner ring 206 of the swivel bearing 8 is attached to the upper surface of the top plate 217. Therefore, the machine body 2 is arranged above the top plate 217.

As shown in FIGS. 29 and 30A, an inner ring mounting portion 224 to which the inner ring 206 is mounted is provided on the upper surface of the top plate 217. A plurality of bolt insertion holes 225 for inserting bolts for fixing the inner ring 206 are formed in the inner ring mounting portion 224 at intervals in the circumferential direction. The bolt insertion hole 225 is formed by an annular edge formed through the top plate 217.

Further, the top plate 217 has a first joint support portion 226 that supports the first fixing portion 212 and a second joint support portion 227 that supports the second fixing portion 213. The first joint support portion 226 projects from the inner ring mounting portion 224 toward the swivel joint 209. In the present embodiment, the first joint support portion 226 extends from the front portion of the inner peripheral edge 228 of the inner ring mounting portion 224 to the rear and toward the swivel joint 209. The second joint support portion 227 is provided on the side opposite to the first joint support portion 226 and projects from the inner ring mounting portion 224 toward the swivel joint 209. In the present embodiment, the second joint support portion 227 extends forward from the rear portion of the inner peripheral edge 228 of the inner ring mounting portion 224 and toward the swivel joint 209. Further, between the tip portion (rear end portion) 226a which is the end portion of the first joint support portion 226 on the protruding side and the tip portion (front end portion) 227a which is the end portion of the second joint support portion 227 in the projecting direction. Is provided with an interval. A swivel joint 209 is arranged between the tip portion 226a and the tip portion 227a.

As shown in FIGS. 30A and 30B, the first joint support portion 226 has a first base portion 229 and a first mounting portion 230. The first base portion 229 is a portion extending from the inner ring mounting portion 224 and reaches a portion extending to the middle portion in the protruding direction of the first joint support portion 226. The first mounting portion 230 is a portion extending from the first base portion 229 to the tip portion 226a of the first joint support portion 226. The first fixing portion 212 is placed on the first mounting portion 230 and attached by bolts 231 (see FIG. 31). The bolt 231 is screwed to the first fixing portion 212 through the first mounting portion 230 from below the first mounting portion 230.

The first base portion 229 is gradually widened in the direction from the first mounting portion 230 toward the inner ring mounting portion 224, and has a substantially fan shape in a plan view. The first base portion 229 has a first edge 229a which is an edge on one side (left side) in the width direction and a second edge on the other side (right side) in the width direction which is an edge opposite to the first edge 229a. It has 229b and.
The first edge 229a is a curved edge that is curved in a concave shape. The first edge 229a is continuous with the first inner peripheral edge 228a, which is a part of the inner peripheral edge 228 of the inner ring mounting portion 224. The first inner peripheral edge 228a is a portion (left side) of the inner peripheral edge 228 in the body width direction K2. Further, the first end edge 229a is continuous with the first side edge 230a, which is an edge portion on one side (left side) in the width direction of the first mounting portion 230.

The second edge 229b is a curved edge that is curved in a concave shape. The second edge 229b is continuous with the second inner peripheral edge 228b, which is a part of the inner peripheral edge 228 of the inner ring mounting portion 224. The second inner peripheral edge 228b is the other (right side) portion of the inner peripheral edge 228 in the body width direction K2. Further, the second end edge 229b is continuous with the second side edge 230b, which is an edge portion on the other side (right side) in the width direction of the first mounting portion 230.

As shown in FIGS. 30A and 30B, the second joint support portion 227 has a second base portion 232 and a second mounting portion 233. The second base portion 232 is a portion extending from the inner ring mounting portion 224 and reaches a portion extending in the middle of the protruding direction of the second joint support portion 227. The second mounting portion 233 is a portion extending from the second base portion 232 to the tip portion 227a of the second joint support portion 227. A second fixing portion 213 is placed on the second mounting portion 233 and attached by a bolt 234 (see FIG. 31). The bolt 234 is screwed to the second fixing portion 213 through the second mounting portion 233 from below the second mounting portion 233.

The second base portion 232 is gradually widened in the direction from the second mounting portion 233 toward the inner ring mounting portion 224, and has a substantially fan shape in a plan view. The second base portion 232 has a third end edge 232a, which is an edge portion on one side (left side) in the width direction, and a fourth end edge, which is an edge portion on the opposite side of the third end edge 232a, on the other side (right side) in the width direction. It has 232b and.
The third edge 232a is a curved edge that is curved in a concave shape. Further, the third edge 232a is continuous with the first inner peripheral edge 228a. Further, the third end edge 232a is continuous with the third side edge 233a, which is an edge portion on one side (left side) in the width direction of the second mounting portion 233.

The fourth edge 232b is a curved edge that is curved in a concave shape. Further, the fourth edge 232b is continuous with the second inner peripheral edge 228b. Further, the fourth end edge 232b is continuous with the fourth side edge 233b, which is an edge portion on the other side (right side) in the width direction of the second mounting portion 233.
As shown in FIG. 30A, the top plate 217 includes a first edge portion 236 forming the opening, a second edge portion 237 forming the opening, a third edge portion 238 forming the opening, and a third edge portion 238 forming the opening. It has four edges 239.

The first edge portion 236 constitutes an opening surrounded by the first inner peripheral edge 228a, the first edge edge 229a, the first side edge 230a, the third edge edge 232a, and the third side edge 233a. The second edge portion 237 constitutes an opening surrounded by a second inner peripheral edge 228b, a second end edge 229b, a second side edge 230b, a fourth end edge 232b, and a fourth side edge 233b. The first edge portion 236 and the second edge portion 237 communicate with each other between the tip portion 226a of the first joint support portion 226 and the tip portion 227a of the second joint support portion 227.

As described above, the top plate 217 has an opening composed of a first edge portion 236, a second edge portion 237, and a communicating portion of the first edge portion 236 and the second edge portion 237. A swivel joint 209 is arranged at the center of this opening. Further, the first joint support portion 226 projects toward the center portion side of the opening, and the second joint support portion 226 is oriented from a position opposite to the first joint support portion 226 with the center portion of the opening toward the center portion side. The joint support portion 227 protrudes.

To remove the swivel joint 209 from the traveling frame 9, remove the fixing of the swivel joint 209 to the first joint support portion 226 and the second joint support portion 227, and move the swivel joint 209 below the top plate 217. It is said. In order to move the swivel joint 209 below the top plate 217, the swivel joint 209 can be moved below the top plate 217 via the first edge portion 236 by translating the swivel joint 209 to the left. Alternatively, by translating the swivel joint 209 to the right, the swivel joint 209 can be moved below the top plate 217 via the second edge portion 237.

Further, in order to move the swivel joint 209 below the top plate 217, the swivel joint 209 may be rotated around the turning axis X1. That is, the swivel joint 209 is rotated so that the first fixing portion 212 is detached from above the first mounting portion 230 and the second fixing portion 213 is detached from above the second mounting portion 233, thereby causing the first edge portion 236. The swivel joint 209 can be moved below the top plate 217 via the second edge portion 237.

When the swivel joint 209 is attached to the traveling frame 9, the procedure for removing the swivel joint 209 is reversed.
As shown in FIG. 30B, the third edge portion 238 constitutes an opening (first opening portion) that penetrates the first base portion 229 from the upper surface to the lower surface. The third edge portion 238 is gradually widened in the direction from the first mounting portion 230 toward the first base portion 229, and has a substantially fan shape in a plan view. The third edge portion 238 has a first side portion 238a, a second side portion 238b, a third side portion 238c, and a fourth side portion 238d.

The first side portion 238a is an edge portion on one side (left side) of K2 in the width direction of the machine body. The first side portion 238a is formed as a convex curved edge curved in substantially the same direction as the first end edge 229a. The second side portion 238b is a side portion facing the first side portion 238a, and is an edge portion on the other side (right side) of K2 in the body width direction. The second side portion 238b is formed as a convex curved edge curved in substantially the same direction as the second end edge 229b. The third side portion 238c is a side portion located between the first side portion 238a and the second side portion 238b and on the radial outer side of the swivel bearing 8. The third side portion 238c is formed on a concave curved edge centered on the swivel axis X1. The fourth side portion 238d is a side portion located between the first side portion 238a and the second side portion 238b and on the radial inward side of the swivel bearing 8. The fourth side portion 238d is formed in a straight line extending in the body width direction K2. The corner portion 238e of the first side portion 238a and the third side portion 238c is formed of a concave curved edge. The corner portion 238f of the second side portion 238b and the third side portion 238c is formed of a concave curved edge. The corner portion 238g of the first side portion 238a and the fourth side portion 238d is formed of a concave curved edge. The corner portion 238h of the second side portion 238b and the fourth side portion 238d is formed by a concave curved edge.

By forming the third edge portion 238 on the first base portion 229, a curved first arm portion 229c and a curved second arm portion 229d are formed. The first arm portion 229c has a curved shape that shifts to the left (outside the machine body) as it goes forward. The second arm portion 229d has a curved shape that shifts to the right (outside the machine body) as it goes forward.
As shown in FIG. 30B, the fourth edge portion 239 constitutes an opening (second opening portion) that penetrates the second base portion 232 from the upper surface to the lower surface. The third edge portion 238 is gradually widened in the direction from the second mounting portion 233 toward the second base portion 232, and has a substantially fan shape in a plan view. The third edge portion 238 has a fifth side portion 239a, a sixth side portion 239b, a seventh side portion 239c, and an eighth side portion 239d.

The fifth side portion 239a is an edge portion on one side (left side) of K2 in the width direction of the machine body. The fifth side portion 239a is formed by a convex curved edge curved in substantially the same direction as the third edge edge 232a. The sixth side portion 239b is a side portion facing the fifth side portion 239a, and is an edge portion on the other side (right side) of K2 in the body width direction. The sixth side portion 239b is formed by a convex curved edge curved in substantially the same direction as the fourth end edge 232b. The seventh side portion 239c is a side portion located between the fifth side portion 239a and the sixth side portion 239b and on the radial outer side of the swivel bearing 8. The seventh side portion 239c is formed by a concave curved edge centered on the swivel axis X1. The eighth side portion 239d is a side portion located between the fifth side portion 239a and the sixth side portion 239b and on the radial inward side of the swivel bearing 8. The eighth side portion 239d is formed in a straight line extending in the body width direction K2. The corner portion 239e of the fifth side portion 239a and the seventh side portion 239c is formed of a concave curved edge. The corner portion 239f of the sixth side portion 239b and the seventh side portion 239c is formed by a concave curved edge. The corner portion 239 g of the fifth side portion 239a and the eighth side portion 239d is formed of a concave curved edge. The corner portion 239h of the sixth side portion 239b and the eighth side portion 239d is formed by a concave curved edge.

By forming the fourth edge portion 239 on the second base portion 232, the curved third arm portion 232c and the curved fourth arm portion 232d are formed. The third arm portion 232c has a curved shape that shifts to the left (outside the machine body) as it goes backward. The fourth arm portion 232d has a curved shape that shifts to the right (outside the fuselage) as it goes backward.
As shown in FIG. 30A, the third edge portion 238 and the fourth edge portion 239 are provided below the movement locus 240 of the pinion 208. In FIG. 30A, reference numeral 240a indicates the outer peripheral side of the movement locus 240, and reference numeral 240b indicates the inner peripheral side of the movement locus 240.

Next, a hose guide 202 for holding the hydraulic hose 201 arranged through the swing bracket 14 will be described.
As shown in FIGS. 32, 33, and 34, the swing bracket 14 includes a first side wall portion 241 and a second side wall portion 242, a rotation support portion 243, a boom connecting portion 244, and a first cylinder connecting portion 245. And a second cylinder connecting portion 246. The first side wall portion 241 is provided at a distance to the left of the second side wall portion 242. The rotation support portion 243 is a portion rotatably supported by the support bracket 58 around the vertical axis. That is, the swing bracket 14 has a rotation support portion 243 that is rotatably supported by the machine body 2 about the vertical axis.

The rotation support portion 243 is located on the rear side of the first side wall portion 241 and the second side wall portion 242. The rotation support portion 243 has a first bracket connecting portion 247 and a second bracket connecting portion 248 located below the first bracket connecting portion 247. The first bracket connecting portion 247 connects the upper portion of the rear portion of the first side wall portion 241 and the second side wall portion 242. The second bracket connecting portion 248 connects the lower portion of the rear portion of the first side wall portion 241 and the second side wall portion 242.

The first bracket connecting portion 247 has an upper side wall portion 247a and a lower side wall portion 247b located below the upper side wall portion 247a. A first connecting pin 249 is provided over the upper side wall portion 247a and the lower side wall portion 247b. The first bracket connecting portion 247 is rotatably connected to the first supporting portion 61A via the first connecting pin 249 about the vertical axis.
The second bracket connecting portion 248 has an upper side wall portion 248a and a lower side wall portion 248b located below the upper side wall portion 248a. A second connecting pin 250 is provided over the upper side wall portion 248a and the lower side wall portion 248b. The second bracket connecting portion 248 is rotatably connected to the second supporting portion 61B via the second connecting pin 250 around the vertical axis.

As shown in FIG. 35, a first hose guide mounting portion 251 and a second hose guide mounting portion 252 are provided on the front portion (rotational support portion 243) of the upper side wall portion 247a of the first bracket connecting portion 247. ing. The first hose guide mounting portion 251 is located on the left side of the swing bracket 14, and the second hose guide mounting portion 252 is located on the right portion of the swing bracket 14. The upper surfaces of the first hose guide mounting portion 251 and the second hose guide mounting portion 252 are formed on a flat surface. A screw hole 251a is formed in the first hose guide mounting portion 251. A screw hole 252a is formed in the second hose guide mounting portion 252.

As shown in FIGS. 32 and 33, the boom connecting portion 244 includes a first portion 244a provided on the upper portion of the first side wall portion 241 and a second portion 244b provided on the upper portion of the second side wall portion 242. Have. The base of the boom 15 is pivotally supported by the boom connecting portion 244 via a third connecting pin 253 provided over the first portion 244a and the second portion 244b (see FIG. 1). The first cylinder connecting portion 245 is a first portion 245a provided in the front portion of the first side wall portion 241.
And a second portion 245b provided in the front portion of the second side wall portion 242. One end side of the boom cylinder C3 is pivotally supported by the first cylinder connecting portion 245 via a fourth connecting pin 254 provided over the first portion 245a and the second portion 245b (see FIG. 1). The second cylinder connecting portion 246 is located below the first portion 246a protruding to the right from the lower portion of the second side wall portion 242 and protruding to the right from the lower portion of the second side wall portion 242. It has a second site 246b and a cylinder. The second cylinder connecting portion 246 is provided with a fifth connecting pin 255 over the first portion 246a and the second portion 246b. One end side of the swing cylinder C2 is pivotally supported by the second cylinder connecting portion 246 via the fifth connecting pin 255.

As shown in FIG. 34, the hydraulic hoses 200 and 201 are arranged from the machine body 2 side (control valve V1) to the work device 4 side through the swing bracket 14. The hydraulic hoses 200 and 201 are arranged from between the first bracket connecting portion 247 and the second bracket connecting portion 248 to the first side wall portion 241 and the second side wall portion 242. The hydraulic hose 200 is a hose for sending and returning hydraulic oil to and from the boom cylinder C3. The hydraulic hose 201 is a hose for sending and returning hydraulic oil to a hydraulic actuator (mounting actuator) that drives a work tool separately mounted on the arm cylinder C4, the bucket cylinder C5, and the work device 4.

As shown in FIGS. 32 and 34, the swing bracket 14 is provided with a hose guide 202 for holding the hydraulic hose 201 arranged through the swing bracket 14.
As shown in FIGS. 35 and 36, the hose guide 202 has a hose holder 256, a holder bracket 257, and a fastener 258. The hose holder 256 is a member that holds the hydraulic hose 201. That is, the hose guide 202 is a member that holds the hydraulic hose 201 for the arm cylinder C4, the bucket cylinder C5, and the mounting actuator.

As shown in FIG. 34, the hose holder 256 is located in front of the first bracket connecting portion 247. As shown in FIG. 36, the hose holder 256 has a first block member 259, a second block member 260, a pressing member 261 and a first sleeve 262 and a second sleeve 263. The first block member 259 and the second block member 260 are formed of an elastic member such as rubber. The first block member 259 is formed with four hose through holes 264A to 264D and two recesses 265A and 265B.

The hose through holes 264A to 264D are holes for passing the hydraulic hose 201, and are formed by a columnar edge formed by penetrating the first block member 259 in the vertical direction. In the first block member 259, slits 266 communicating with the hose through holes 264A to 264D are formed corresponding to the hose through holes 264A to 264D. By elastically deforming the first block member 259 to open the slit 266, the hydraulic hose 201 can be passed through the hose through holes 264A to 264D.

The recesses 265A and 265B are portions for forming through holes for passing the hydraulic hose 201. The recesses 265A and 265B are formed in a semi-cylindrical shape having a vertical axis at the rear portion of the first block member 259. Further, an insertion hole 267L is formed in the left portion of the first block member 259. An insertion hole 267R is also formed on the right side of the first block member 259. Each of the insertion holes 267L and 267R is formed by a columnar edge formed by penetrating the first block member 259 back and forth. A positioning member 268 is provided at the center of the front portion of the first block member 259.

The second block member 260 is located behind the first block member 259. Two recesses 269A and 269B are formed in the second block member 260. The recesses 269A and 269B are portions for forming through holes for passing the hydraulic hose 201. The recesses 269A and 269B are formed in a semi-cylindrical shape having a vertical axis at the front portion of the second block member 260. When the front surface of the second block member 260 is overlapped with the rear surface of the first block member 259, a through hole for passing one hydraulic hose 201 is formed in the recess 265A and the recess 269A, and the recess 265B and the recess 269B form another through hole. A through hole is formed through which one hydraulic hose 201 is passed. An insertion hole 270L is formed in the left portion of the second block member 260. An insertion hole 270R is also formed on the right side of the second block member 260. Each of the insertion holes 270L and 270R is formed by a columnar edge formed by penetrating the second block member 260 in the front-rear direction. When the front surface of the second block member 260 is overlapped with the rear surface of the first block member 259, the insertion hole 267L and the insertion hole 270L communicate with each other, and the insertion hole 267R and the insertion hole 270R communicate with each other. A positioning member 271 is provided at the center of the rear surface of the second block member 260 (see FIG. 35).

The pressing member 261 is a member that is superposed on the front surface of the first block member 259 and jointly presses the first block member 259 and the second block member 260 together with the holder bracket 257. The pressing member 261 is formed of a plate material. A positioning hole 272 through which the positioning member 268 is inserted is formed in the central portion of the pressing member 261. The positioning hole 272 is composed of an annular edge formed through the pressing member 261. A bar 273 is provided at the lower end of the pressing member 261. The bar 273 is a member for protecting the hydraulic hose 200 when the hydraulic hose 200 for the boom cylinder C3 arranged below the hose guide 202 hits the hose holder 256, and is columnar. Is formed in.

The front end of the first sleeve 262 is fixed to the left portion of the pressing member 261 and projects rearward from the pressing member 261. A female thread is cut on the inner peripheral surface of the first sleeve 262. That is, the inner peripheral surface of the first sleeve 262 is formed in a screw hole. The first sleeve 262 is inserted into the insertion hole 267L and the insertion hole 270L. The front end of the second sleeve 263 is fixed to the right portion of the pressing member 261 and projects rearward from the pressing member 261. A female thread is cut on the inner peripheral surface of the second sleeve 263. That is, the inner peripheral surface of the second sleeve 263 is formed in a screw hole. The second sleeve 263 is inserted through the insertion hole 267R and the insertion hole 270R.

The holder bracket 257 is formed of a plate material and has a holding portion 276a, a mounting stay portion 275, a connecting portion 276b, and a reinforcing plate 277. The holding portion 276a is a portion that sandwiches and holds the first block member 259 and the second block member 260 (in cooperation with the holding member 261) with the holding member 261. A positioning hole 278 through which the positioning member 271 is inserted is formed in the central portion of the holding portion 276a. The positioning hole 278 is composed of an annular edge formed through the pressing member 261. A first bolt insertion hole 279L is formed in the left portion of the holding portion 276a. A second bolt insertion hole 279R is formed on the right side of the holding portion 276a. The first bolt insertion hole 279L and the second bolt insertion hole 279R are formed by an annular edge formed through the holding portion 276a.

The mounting stay portion 275 is a portion to be mounted on the rotation support portion 243 from above. That is, the holder bracket 257 has a mounting stay portion 275 that is attached to the rotation support portion 243 from above. The left portion of the mounting stay portion 275 is superposed on the first hose guide mounting portion 251 and the right portion of the mounting stay portion 275 is superposed on the second hose guide mounting portion 252. The mounting stay portion 275 is mounted on the rotation support portion 243 (upper side wall portion 247a of the first bracket connecting portion 247) by two bolts 280A and 280B. That is, the bolt 280A penetrates the mounting stay portion 275 from above and is screwed into the screw hole 251a. Further, the bolts 280A and 280B penetrate the mounting stay portion 275 from above and are screwed into the screw holes 252a.

The connecting portion 276b extends downward from the front portion of the mounting stay portion 275 and is connected to the upper portion of the holding portion 276a. The reinforcing plate 277 is provided from the lower surface of the mounting stay portion 275 to the upper portion of the back surface of the holding portion 276a.
The fastener 258 is a component that attaches the hose holder 256 to the holder bracket 257, and is composed of bolts. The fastener 258 includes a first mounting bolt 281 and a second mounting bolt 282. The first mounting bolt 281 has a screw shaft portion 281a and a head (tightening operation portion) 281b. The second mounting bolt 282 also has a screw shaft portion 282a and a head (tightening operation portion) 282b. The screw shaft portions 281a and 282a are portions formed by cutting a male screw on the outer circumference of the cylindrical member. The heads 281b and 282b have screw shaft portions 281a,
It is a portion for engaging a tool for rotating 282a, and is formed in a hexagonal columnar shape. The screw shaft portion 281a of the first mounting bolt 281 is screwed into the first sleeve 262 by inserting the first bolt insertion hole 279L from the rear. The screw shaft portion 282a of the second mounting bolt 282 is screwed into the second sleeve 263 by inserting the second bolt insertion hole 279R from the rear.

As shown in FIG. 34, with the holder bracket 257 attached to the swing bracket 14 and the fastener 258 attached to the holder bracket 257, the first mounting bolt 281 (fastener 258) and the second mounting bolt 282 (fastening). The heads 281b and 282b of the tool 258) face the rotation support portion 243 side. That is, the hose guide 202 is a fastener 258 that attaches the hose holder 256 to the holder bracket 257, and has tightening operation portions 281b and 282b that face the rotation support portion 243 side while being attached to the holder bracket 257. It is equipped with a hose 258.

The hydraulic hose 201 is attached to the hose guide 202 in a state where the hose guide 202 is removed from the swing bracket 14 and the hydraulic hose 201 is not connected to the hydraulic actuator. The procedure for attaching the hydraulic hose 201 to the hose guide 202 will be described below.
First, the hydraulic hose 201 arranged through the swing bracket 14 is passed through the hose through holes 264A to 264D of the first block member 259, and the recesses 265A and 265B of the first block member 259 and the recesses 265A of the second block member 260. , 265B and through the through hole formed by. Next, with the second block member 260 superimposed on the first block member 259, the first sleeve 262 is inserted into the insertion hole 267L and the insertion hole 270L, and the second sleeve 263 is inserted into the insertion hole 267R and the insertion hole 270R. And the pressing member 261 is overlapped with the front surface of the first block member 259. In this state, the first mounting bolt 281 is screwed into the first sleeve 262 from the rear of the holding portion 276a through the first bolt insertion hole 279L, and the second mounting bolt 282 is screwed into the second bolt insertion hole from the rear of the holding portion 276a. It is screwed into the second sleeve 263 through 279R.

As described above, the hydraulic hose 201 is attached to the hose guide 202.
After attaching the hydraulic hose 201 to the hose guide 202, the holder bracket 257 (hose guide 202) is attached to the swing bracket 14.
In the present embodiment, the working machine 1 is a traveling frame 9 having a top plate 217 having an opening, and a swivel table (machine body 2) rotatably arranged on the traveling frame 9 with the central portion of the opening as a swivel axis. And a swivel joint 209 arranged in the center of the opening, the top plate 217 projects toward the center and supports the swivel joint 209 with the first joint support portion 226 and the first joint sandwiching the center. A second joint support portion 227 that projects from a position opposite to the support portion 226 toward the center portion and supports the swivel joint 209 is provided, and the first joint support portion 226 has a first opening that penetrates from the upper surface to the lower surface. A portion is formed, and the second joint support portion 227 is formed with a second opening penetrating from the upper surface to the lower surface.

As a result, the area on which the foreign matter rides on the first joint support portion 226 and the second joint support portion 227 can be reduced. In addition, foreign matter on the first joint support portion 226 and the second joint support portion 227 can be dropped downward from the first opening and the second opening. Therefore, it is possible to prevent foreign matter from accumulating on the first joint support portion 226 and the second joint support portion 227.

Further, a swivel motor M2 attached to the swivel base (body 2), an outer ring 205 attached to the swivel base (body 2), and an outer ring 205 rotatably provided around the center of the swivel axis on the inner peripheral side of the outer ring 205. Along the inner peripheral gear portion 107 by meshing with the swivel bearing 8 having the inner ring 206 having the inner peripheral gear portion 207 formed on the inner peripheral side and the inner peripheral gear portion 207 and being rotationally driven by the swivel motor M2. With a moving pinion 208, the traveling frame 9 has an annular inner ring attachment portion 224 to which the inner ring 206 is attached, and the first joint support portion 226 and the second joint support portion 227 are central to the inner ring attachment portion 224. Protruding to the side, the first opening and the second opening are provided below the movement locus of the pinion 208.

As a result, it is possible to prevent foreign matter from accumulating on the movement locus 240 of the pinion 208, and to prevent damage to the pinion 208 due to contact with the foreign matter.
Further, the swivel joint 209 has a first fixing portion 212 protruding in one direction in the horizontal direction and a second fixing portion 213 protruding in the other direction in the horizontal direction opposite to one, and the first joint supporting portion. The 226 has a first mounting portion 230 on which the first fixing portion 212 is mounted and mounted, and a first base portion 229 that gradually widens in a direction away from the first mounting portion 230, and has a second joint support portion 227. Has a second mounting portion 233 on which the second fixing portion 213 is mounted and mounted, and a second base portion 232 that gradually widens in a direction away from the second mounting portion 233, and has a first opening (third). The edge portion 238) is provided in the first base portion 229, and is gradually formed wider in the direction away from the first mounting portion 230, and the second opening (fourth edge portion 239) is provided in the second base portion 232. It is formed gradually wider in the direction away from the second mounting portion 233.

As a result, it is possible to prevent foreign matter from accumulating on the first joint support portion 226 and the second joint support portion 227 while ensuring the rigidity of the first joint support portion 226 and the second joint support portion 227.
Further, the swing bracket 14 having the rotation support portion 243 rotatably supported on the swivel base (body 2) around the vertical axis, the hydraulic hose 201 disposed through the swing bracket 14, and the hydraulic hose 201 are held. The hose holder 256, the holder bracket 257 attached to the swing bracket 14, and the fastener 258 for attaching the hose holder 256 to the holder bracket 257, and the rotary support portion in a state of being attached to the holder bracket 257. It includes a fastener 258 having tightening operation portions 281b and 282b facing the 243 side.

In the above configuration, the tightening operation portion of the fastener 258 faces the rotation support portion 243 side in the state of being attached to the holder bracket 257. As a result, the work of tightening the fastener 258 and attaching the hose holder 256 to the holder bracket 257 can be performed from above the hydraulic hose 201. That is, the tightening direction of the fastener 258 can be changed from the upper side to the lower side of the hydraulic hose 201. As a result, the installation work of the hydraulic hose 201 (tightening work of the fastener 258) can be easily performed.

Further, the holder bracket 257 has a mounting stay portion 275 that is attached to the rotation support portion 243 from above. Since there are no members or the like that hinder the mounting above the rotation support portion 243, the mounting stay portion 275 can be easily mounted. Further, since the mounting stay portion 275 can be mounted on the rotation support portion 243 from above, the mounting work of the mounting stay portion 275 is performed from above while standing, so that the mounting work can be easily performed.

Next, the structure of the bonnet center 24 will be described.
First, the configuration of the rear lower portion of the cabin 5 mounted on the bonnet center 24 will be described.
As shown in FIG. 37, the rear lower frame 53 of the cabin 5 includes a rear horizontal member (horizontal member) 286, a first rear assembly portion 287, a second rear assembly portion 288, and a plurality of sealing materials. (1st seal 289, 2nd seal 290, 3rd seal 291). The rear horizontal member 286 is formed into a deformed tubular body by extruded shaped steel (see FIG. 39A), and is provided between the lower ends of the first rear strut portion 79 and the second rear strut portion 80. As shown in FIG. 40, the rear horizontal member 286 has a front lower wall 286a forming the lower surface of the front portion and a rear lower wall 286b forming the lower surface of the rear portion. The front lower wall 286a is formed to have a wider front-rear width than the rear lower wall 286b. Further, the front lower wall 286a is formed at a position higher than the rear lower wall 286b.

As shown in FIGS. 42 and 43, the first rear assembly portion 287 is formed of a plate material and is fixed to the lower surface on the left side of the front lower wall 286a. The first rear mount 50 is assembled to the first rear assembly portion 287. An opening 292 through which the first rear mount 50 is inserted is formed in a portion of the front lower wall 286a corresponding to the first rear mount 50. The opening 292 is composed of an annular edge formed through the front lower wall 286a of the rear horizontal member 286. The second rear assembly portion 288 is formed of a plate material and is fixed to the lower surface on the right side of the front lower wall 286a. The second rear mount 51 is assembled to the second rear assembly portion 288. An opening 293 through which the second rear mount 51 is inserted is formed in a portion of the front lower wall 286a corresponding to the second rear mount 51. The opening 293 is composed of an annular edge formed through the front lower wall 286a of the rear horizontal member 286. In the present embodiment, the first rear mount 50 and the second rear mount 51 are assembled to the cabin 5, but the present invention is not limited to this, and for example, the first rear mount assembled to the beam member 67 (support portion) described later. The cabin 5 may be placed on the 50 and the second rear mount 51.

The first seal 289 is provided over the lower surface side of the left end portion of the rear horizontal member 286 and the lower end portion of the first rear strut portion 79. The second seal 290 is provided over the lower surface side of the right end portion of the rear horizontal member 286 and the lower end portion of the second rear strut portion 80. The third seal 291 is provided over the first seal 289 and the second seal 290. Further, the third seal 291 is provided on the rear side of the rear horizontal member 286 and on the rear side of the first rear mount 50 and the second rear mount 51. Further, in the present embodiment, the third seal 291 is composed of two members, a front sealing material 291A and a rear sealing material 291B that comes into contact with the rear surface of the front sealing material 291A, and is fixed to the rear lower wall 286b ( (See FIG. 40).

As shown in FIG. 38, the bonnet center 24 has a front central portion 294, a left side portion 295, a right side portion 296, a mounting portion 297, and a rear upper portion 298. As shown in FIGS. 39A, 39B, and 42, the bonnet center 24 has a first wall portion 299 on the indoor 5A side of the cabin 5 and a second wall portion 300 on the engine room E2 side, and these It is formed in a hollow structure having an air layer between the first wall portion 299 and the second wall portion 300. For example, the bonnet center 24 is made of a hollow synthetic resin product formed by blow molding or rotary molding.

As shown in FIG. 4, the front central portion 294 is located at a position corresponding to the driver's seat 6 (behind the driver's seat 6). The left side portion 295 is on the left side of the front central portion 294 and is located on the left side side of the driver's seat 6. The lower surface (see FIG. 6) of the rear portion of the first side surface portion 38 of the cabin 5 comes into contact with the left side portion 295 via the sealing material 38a. The right side portion 296 is on the right side of the front central portion 294 and is located on the right side side of the driver's seat 6. The lower surface (see FIG. 6) of the rear portion of the second side surface portion 39 comes into contact with the right side portion 296 via the sealing material 39a. As shown in FIGS. 38 and 39A, the front central portion 294 is more immersive than the left side portion 295, the right side portion 296 and the mounting portion 297. An inspection opening 301 is formed in the main body portion 294a of the front central portion 294. The inspection opening 301 is closed from the front side by a lid member 294b having a hollow structure, and the lid member 294b is pressed by a plurality of pressing plates 303A, 303B, 303C bolted to the main body portion 294a.

As shown in FIGS. 38 and 39A, the mounting portion 297 extends rearward from the upper part of the front central portion 294. Further, the mounting portion 297 is provided between the upper part of the left side portion 295 and the right side portion 296. The mounting portion 297 is a portion forming the upper surface side of the engine room E2 (covering the upper side of the engine E1), and is mounted and supported on the beam member 67 (support portion). As shown in FIG. 1, the rear portion of the cabin 5 is mounted on the mounting portion 297. That is, the rear lower frame 53, the first rear strut portion 79, and the second rear strut portion 80 are placed via the first seal 289, the second seal 290, and the third seal 291.

As shown in FIG. 38, the rear upper portion 298 is provided on the right side and the rear side of the mounting portion 297. The rear upper portion 298 and the mounting portion 297 form the upper surface side of the engine room E2. The first wall portion 299 in the rear upper portion 298 is formed higher than the mounting portion 297 (see FIG. 39B). Conversely, the first wall portion 299 in the mounting portion 297 is recessed downward from the rear upper portion 298.

As shown in FIG. 38, the mounting portion 297 includes a plurality of reinforcing portions (first reinforcing portion 304, second reinforcing portion 305) and a plurality of installation portions (first installation portion 306, second installation portion 307). , It has a plurality of screw insertion portions (first screw insertion portion 308, second screw insertion portion 309).
The first reinforcing portion 304 and the second reinforcing portion 305 are provided on the central side of the mounting portion 297 in the body width direction K2. Further, the first reinforcing portion 304 and the second reinforcing portion 305 are provided so as to be divided into left and right with the center of the mounting portion 297 in the body width direction K2 as a boundary. The first reinforcing portion 304 is located on the left side of the second reinforcing portion 305. The first installation portion 306 is provided on the left side of the mounting portion 297.
The second installation portion 307 is provided on the right side of the mounting portion 297. That is, the reinforcing portions (first reinforcing portion 304 and second reinforcing portion 305) are provided between the first installation portion 306 and the second installation portion 307.

The first screw insertion portion 308 is provided between the first reinforcing portion 304 and the first installation portion 306. The second screw insertion portion 309 is provided between the second reinforcing portion 305 and the second installation portion 307. In other words, the reinforcing portions (first reinforcing portion 304 and second reinforcing portion 305) are provided between the first screw insertion portion 308 and the second screw insertion portion 309. Further, the first screw insertion portion 308 and the second screw insertion portion 309 are provided between the first installation portion 306 and the second installation portion 307. A plurality of reinforcing portions (first reinforcing portion 304, second reinforcing portion 305), a plurality of installation portions (first installation portion 306, second installation portion 307), and a plurality of screw insertion portions (first screw insertion portion 308, first The two-screw insertion portions 309) are formed side by side in the body width direction K2.

As shown in FIGS. 40 and 41A, the third seal 291 is located behind the first reinforcing portion 304 and the second reinforcing portion 305. The third seal 291 is in contact with the first wall portion 299 of the mounting portion 297. That is, the rear portion of the cabin 5 has a sealing material that abuts on the first wall portion 299 of the mounting portion 297. The second wall portion 300 of the mounting portion 297 is in contact with the beam member 67 (support portion).

As shown in FIGS. 40 and 41A, the first reinforcing portion 304 has a first hole edge portion 304a, a second hole edge portion 304b, and a rib wall 304c.
The first hole edge portion 304a is an annular edge portion formed through the first wall portion 299 in the mounting portion 297. The first hole edge portion 304a is formed in a horizontally long elliptical shape (oval) that is long in the body width direction K2 in a plan view. The first hole edge portion 304a is located in the room 5A of the cabin 5 in front of the third seal 291 (seal material). The front lower wall 286a of the rear horizontal member 286 is located above the first hole edge portion 304a.

The second hole edge portion 304b is an annular edge portion formed through the second wall portion 300 of the mounting portion 297. The second hole edge portion 304b is formed below (substantially directly below) the first hole edge portion 304a. The second hole edge portion 304b is formed in a horizontally long elliptical shape (oval) that is long in the body width direction K2 in a plan view. The second hole edge portion 304b is formed to have substantially the same shape as the first hole edge portion 304a. The second hole edge portion 304b is closed by the beam member 67 (support portion).

The rib wall 304c is formed in a horizontally long elliptical cylinder (long cylinder) that is long in the body width direction K2. The upper end of the rib wall 304c is connected to the peripheral edge of the first hole edge portion 304a. The lower end of the rib wall 304c is connected to the peripheral edge of the second hole edge 304b. Therefore, the rib wall 304c connects the entire peripheral edge of the first hole edge portion 304a and the entire peripheral edge of the second hole edge portion 304b. That is, the reinforcing portion reinforces the hollow structure by connecting the first wall portion 299 and the second wall portion 300.

As shown in FIGS. 40 and 41A, the second reinforcing portion 305 also has a first hole edge portion 305a, a second hole edge portion 305b, and a rib wall 305c. The first hole edge portion 305a is an annular edge portion formed through the first wall portion 299 in the mounting portion 297. The first hole edge portion 305a is formed in a horizontally long elliptical shape (oval) that is long in the body width direction K2 in a plan view. The first hole edge portion 305a is located in the room 5A of the cabin 5 in front of the third seal 291 (seal material). The front lower wall 286a of the rear horizontal member 286 is located above the first hole edge portion 305a.

The second hole edge portion 305b is an annular edge portion formed through the second wall portion 300 of the mounting portion 297. The second hole edge portion 305b is formed below (substantially directly below) the first hole edge portion 305a. The second hole edge portion 305b is formed in a horizontally long elliptical shape (oval) that is long in the body width direction K2 in a plan view. The second hole edge portion 305b is formed to have substantially the same shape as the first hole edge portion 305a. The second hole edge portion 305b is closed by the beam member 67 (support portion).

The rib wall 305c is formed in a horizontally long elliptical cylinder (long cylinder) that is long in the body width direction K2. The upper end of the rib wall 305c is connected to the peripheral edge of the first hole edge portion 305a. The lower end of the rib wall 305c is connected to the peripheral edge of the second hole edge portion 305b. Therefore, the rib wall 305c connects (connects) the entire peripheral edge of the first hole edge portion 305a and the entire peripheral edge of the second hole edge portion 305b. That is, the reinforcing portion reinforces the hollow structure by connecting the first wall portion 299 and the second wall portion 300.

The number of reinforcing portions may be one, or three or more may be provided. At least one may be provided. Further, the reinforcing portion may be circular or polygonal in a plan view. Further, the place to be provided may be anywhere as long as it is between the first installation unit 306 and the second installation unit 307. As shown in FIG. 41B, the reinforcing portion 311 has a rib wall 311a formed by denting the second wall portion 300 in the mounting portion 297 and connecting (connecting) to the first wall portion 299. You may. Further, the reinforcing portion may have a rib wall formed by denting the first wall portion 299 and connecting (connecting) to the first wall portion 299.

As shown in FIGS. 42 and 43, the first installation portion 306 is a portion where the first rear mount 50 is provided (inserted). The first installation portion 306 has a third hole edge portion 306a, a fourth hole edge portion 306b, and a first tubular wall 306c. The third hole edge portion 306a is a circular annular edge portion formed through the first wall portion 299 of the mounting portion 297. The third hole edge portion 306a is located in the room 5A of the cabin 5 in front of the third seal 291 (seal material). The front lower wall 286a of the rear horizontal member 286 is located above the third hole edge portion 306a. The fourth hole edge portion 306b is a circular annular edge portion formed through the second wall portion 300 of the mounting portion 297. The fourth hole edge portion 306b is located below the third hole edge portion 306a. The first cylinder wall 306c connects the entire peripheral edge of the third hole edge portion 306a and the entire peripheral edge of the fourth hole edge portion 306b. The first rear mount 50 is placed in contact with the beam member 67 (support portion) through the first installation portion 306. Further, the first rear mount 50 is attached via a bolt (stud bolt) 312 erected on the beam member 67 by being screwed into the first screw hole 68 and a plurality of nut members 313A and 313B.

As shown in FIGS. 42 and 43, the second installation portion 307 is a portion where the second rear mount 51 is provided (inserted). The second installation portion 307 also has a third hole edge portion 307a, a fourth hole edge portion 307b, and a first tubular wall 307c. The third hole edge portion 307a is a circular annular edge portion formed through the first wall portion 299 of the mounting portion 297. The third hole edge portion 307a is located in the room 5A of the cabin 5 in front of the third seal 291 (seal material). The front lower wall 286a of the rear horizontal member 286 is located above the third hole edge portion 307a. The fourth hole edge portion 307b is a circular annular edge portion formed through the second wall portion 300 of the mounting portion 297. The fourth hole edge portion 307b is located below the third hole edge portion 307a. The first cylinder wall 307c connects the entire peripheral edge of the third hole edge portion 307a and the entire peripheral edge of the fourth hole edge portion 307b. The second rear mount 51 is placed in contact with the beam member 67 (support portion) through the second installation portion 307. Further, the second rear mount 51 is attached via a stud bolt 314 erected on the beam member 67 by being screwed into the second screw hole 69 and a plurality of nut members 315A and 315B.

As shown in FIGS. 42 and 43, the first screw insertion portion 308 is a portion through which the first mounting member 316 is inserted. The first mounting member 316 is a member for mounting the mounting portion 297 to the beam member 67 (support portion), and is composed of bolts. The first screw insertion portion 308 has a fifth hole edge portion 308a, a sixth hole edge portion 308b, and a second tubular wall 308c. The fifth hole edge portion 308a is a circular annular edge portion formed through the first wall portion 299 of the mounting portion 297. The fifth hole edge portion 308a is located in the room 5A of the cabin 5 in front of the third seal 291 (seal material). The front lower wall 286a of the rear horizontal member 286 is located above the fifth hole edge portion 308a. The sixth hole edge portion 308b is a circular annular edge portion formed through the second wall portion 300 of the mounting portion 297. The sixth hole edge portion 308b is located below the fifth hole edge portion 308a. The second tubular wall 308c connects the entire peripheral edge of the fifth hole edge portion 308a and the entire peripheral edge of the sixth hole edge portion 308b.

A sleeve 317 is provided in the first screw insertion portion 308. A washer 318 is provided above the sleeve 317. The first mounting member 316 is screwed into the third screw hole 70 through the washer 318 and the sleeve 317 from above.
As shown in FIGS. 42 and 43, the second screw insertion portion 309 is a portion through which the second mounting member 319 is inserted. The second mounting member 319 is a member for mounting the mounting portion 297 to the beam member 67 (support portion), and is composed of bolts. The second screw insertion portion 309 also has a fifth hole edge portion 309a, a sixth hole edge portion 309b, and a second cylinder wall 309c. The fifth hole edge portion 309a is a circular annular edge portion formed through the first wall portion 299 of the mounting portion 297. The fifth hole edge portion 309a is located in the room 5A of the cabin 5 in front of the third seal 291 (seal material). The front lower wall 286a of the rear horizontal member 286 is located above the fifth hole edge portion 309a. The sixth hole edge portion 309b is a circular annular edge portion formed through the second wall portion 300 of the mounting portion 297. The sixth hole edge portion 309b is located below the fifth hole edge portion 309a. The second tubular wall 309c connects the entire peripheral edge of the fifth hole edge portion 309a and the entire peripheral edge of the sixth hole edge portion 309b.

A sleeve 320 is provided in the second screw insertion portion 309. A washer 321 is provided above the sleeve 320. The first mounting member 316 is screwed into the fourth screw hole 71 through the washer 321 and the sleeve 320 from above.
The second mounting member 319 is provided at intervals in the body width direction K2 with respect to the first mounting member 316. The first mounting member 316 and the second mounting member 319 are located between the first mounting portion 306 and the second mounting portion 307, and the reinforcing portions 304 and 305 are the first mounting member 316 and the second mounting member 319. Located between.

Next, the hinge structure 326 that supports the rear bonnet 25 will be described.
As shown in FIGS. 44 to 48, the hinge structure 326 has a fixed hinge 327, a hinge shaft 328, a movable hinge 329, and a lock lever 330. The hinge structure 326 is located inside the left side of the rear bonnet 25.
As shown in FIG. 44, the fixed hinge 327 is fixed to the support frame 60 (first leg 64). As shown in FIGS. 45 to 48, the fixed hinge 327 is formed of a plate material and has a vertical wall 327a, an upper wall 327b, and a lower wall 327c. The vertical wall 327a is overlapped with the rear surface of the hanging portion 64C of the first leg 64 and fixed by a bolt.

The lower portion of the vertical wall 327a protrudes to the right from the hanging portion 64C, and the lever shaft 331 is fixed to the protruding portion so as to protrude to the right. The lever shaft 331 has an axial center extending in the body width direction K2. The upper wall 327b extends rearward from the upper part of the vertical wall 327a. The lower wall 327c extends rearward from the lower part of the vertical wall 327a. The lower wall 327c is located below the upper wall 327b.

As shown in FIG. 45, the hinge shaft 328 is provided so as to extend in the vertical direction from the upper wall 327b to the lower wall 327c. A fixing plate 332 is fixed to the upper end of the hinge shaft 328. The fixing plate 332 is bolted to the upper wall 327b.
As shown in FIGS. 45 to 48, the movable hinge 329 has a rotary cylinder 333 and a movable piece 334. The rotary cylinder 333 is provided between the rear portion of the upper wall 327b and the lower wall 327c of the fixed hinge 327. A hinge shaft 328 is inserted through the rotary cylinder 333. The rotary cylinder 333 is rotatable around the axis of the hinge shaft 328. The movable piece 334 is formed of a plate material and has a base wall 334a, an extending wall 334b, and a mounting wall 334c. The base wall 334a has one end fixed to the rotary cylinder 333 in a direction along the plate surface and in a direction orthogonal to the top and bottom. Therefore, the base wall 334a has a shape protruding radially outward from the rotary cylinder 333. The extending wall 334b extends from the end of the base wall 334a in the protruding direction in a direction intersecting the protruding direction. The mounting wall 334c extends from the end of the extending wall 334b in the extending direction in the direction opposite to the protruding direction of the base wall 334a. As shown in FIG. 44, the mounting bracket 335 is fixed to the inner surface on the left side of the rear bonnet 25. The extension side of the mounting wall 334c is fixed to the mounting bracket 335. That is, the movable hinge 329 is fixed to the rear bonnet 25. Further, the movable hinge 329 is rotatably attached to the fixed hinge 327 around the vertical axis so as to open and close the rear bonnet 25.

As shown in FIGS. 45 to 48, the movable piece 334 (movable hinge 329) has a locking groove 336. The locking groove 336 is formed in the middle of the movable piece 334 in the vertical direction. Further, the locking groove 336 is continuously formed over the base wall 334a, the extending wall 334b, and the mounting wall 334c. The locking groove 336 is formed by an annular edge formed through the movable piece 334. The locking groove 336 is a portion formed on the base wall 334a, a first groove portion 336a, a portion formed on the extending wall 334b, a second groove portion 336b, and a portion formed on the mounting wall 334c. It has three groove portions 336c.

As shown in FIGS. 45, 47, and 48, the width W1 (vertical width) of the locking groove 336 is formed to have the same width in the length direction of the groove.
As shown in FIGS. 46 to 48, the lock lever 330 is a member that maintains the rear bonnet 25 in an open state. The lock lever 330 is formed of a plate material whose plate surface faces K2 in the width direction of the machine body and is long in the front-rear direction. The lock lever 330 has a proximal end portion 330a (front portion) on the proximal end side, a distal end portion 330b (rear portion) on the distal end side, and an intermediate portion 330c between the proximal end portion 330a and the distal end portion 330b. The base end portion 330a is rotatably supported around the axis center by the lever shaft 331. As a result, the base end portion 330a of the lock lever 330 is pivotally supported on the fixed hinge 327 side so that the lock lever 330 can swing up and down around the lever shaft 331. Further, the lock lever 330 projects rearward from the vertical wall 327a and inserts the locking groove 336. That is, the movable hinge 329 has a locking groove 336 through which the lock lever 330 is inserted.

The tip portion 330b is provided with a locking portion 337. The locking portion 337 is composed of a groove having an open downward shape, and fits into the lower edge portion (lower edge portion of the first groove portion 336a) of the locking groove 336 in a state where the rear bonnet 25 is opened. This restricts the rotation of the movable hinge 329 with the rear bonnet 25 open. That is, the lock lever 330 has a locking portion 337 that regulates the rotation of the movable hinge 329 with the rear bonnet 25 open by fitting into the lower edge portion of the locking groove 336.

The locking portion 337 includes a first groove edge portion 337a near the base end portion 330a, a second groove edge portion 337b facing the first groove edge portion 337a, a first groove edge portion 337a, and a second groove edge portion 337b. It has a third groove edge portion 337c that connects the upper ends of the above. The second groove edge portion 337b is formed longer than the first groove edge portion 337a downward.
As shown in FIG. 48, in a state where the locking portion 337 is fitted to the lower edge portion of the locking groove 336, the vertical width W1 of the locking groove 336 and the base end of the lock lever 330 are larger than the locking portion 337. The relationship between the vertical width W2 of the proximal end side portion 338, which is a side portion, and the vertical width W3 of the distal end side portion 339, which is a portion on the distal end side of the locking portion 337 of the lock lever 330, is the width. W3> width W1> width W2. That is, the width W2 of the base end side portion 338 than the locking portion 337 is shorter than the width of the locking groove 336, and the width W3 of the tip end side portion 339 than the locking portion 337 is longer than the width of the locking groove 336. ..

As shown in FIG. 46, a gripping member 340 is provided in the middle portion 330c of the lock lever 330. The gripping member 340 projects to the right from the right side surface of the lock lever 330. The gripping member 340 may be provided on the base end side 330a of the lock lever 330.
As shown in FIG. 47, when the rear bonnet 25 is closed, the lower surface 330d of the middle portion 330c of the lock lever 330 comes into contact with the lower edge portion 336d of the locking groove 336 (the lower edge portion of the second groove portion 336b). There is. The rear bonnet 25 can be moved in the opening / closing direction by sliding the lower surface 330d of the middle portion 330c of the lock lever 330 on the lower edge portion 336d of the locking groove 336. Further, as shown in FIG. 46, when the rear bonnet 25 is closed, the grip member 340 is located on the left side of the mounting wall 334c as shown by the solid line.

As shown in FIG. 46, when the rear bonnet 25 is opened from the closed state, the movable hinge 329 moves from the closed position shown by the solid line to the open position shown by the virtual line. As shown in FIG. 48, when the rear bonnet 25 is opened, the locking portion 337 coincides with the lower edge portion 336d of the locking groove 336 (the lower edge portion of the first groove portion 336a), and the locking portion 337 is engaged. It fits into the lower edge portion 336d of the blind groove 336. As a result, the movement in the opening / closing direction is restricted with the rear bonnet 25 open. Further, when the rear bonnet 25 is opened, the movable hinge 329 is located behind the gripping member 340, and the gripping member 340 can be gripped.

To close the rear bonnet 25 from the open state, hold the gripping member 340 and pull up the lock lever 330. Then, as shown in FIG. 49, since the lower end of the base end side portion 338 is located above the lower edge portion 336d (lower edge portion of the first groove portion 336a) of the locking groove 336, the movable hinge 329 is located on the rear bonnet. It is possible to move in the closing direction of 25 (from the position shown by the virtual line in FIG. 46 to the position shown by the solid line). As a result, the rear bonnet 25 can be closed.

As shown in FIG. 49, with the rear bonnet 25 open, the lock lever 330 is pulled up and the upper end of the tip portion 330b abuts on the upper edge portion 336e (upper edge portion of the first groove portion 336a) of the locking groove 336. Then, the upward swing of the lock lever 330 is restricted. In this state, the lower end of the tip end side portion 339 is located below the upper surface of the lower edge portion 336d of the locking groove 336. As a result, the movement of the movable hinge 329 in the opening direction of the rear bonnet 25 is restricted by the distal end side portion 339. That is, the rear bonnet 25 does not move further in the opening direction from the position where the movement in the opening direction is restricted by the lock lever 330.

In the present embodiment, the working machine 1 is a machine body 2, a cabin 5 mounted on the machine body 2, an engine E1 arranged on the rear side of the cabin 5, and an engine room accommodating the interior 5A and the engine E1 of the cabin 5. A cover member (bonnet center 24) that separates E2 and has a hollow structure having a first wall portion 299 arranged on the cabin 5 side and a second wall portion 300 arranged on the engine E1 side (a hollow structure cover member). The bonnet center 24), the cover member, the support portion (beam member 67) that supports the rear portion of the cabin 5 arranged on the cover member, and the first rear mount 50 that supports one of the rear portions of the cabin 5 on the support portion. A second rear mount 51 that supports the other rear portion of the cabin 5 on the support portion is provided, and the cover member includes a first installation portion 306 on which the first rear mount 50 is arranged and a second rear mount 51. Is provided between the second installation portion 307 and the first installation portion 306 and the second installation portion 307, and the hollow structure is reinforced by connecting the first wall portion 299 and the second wall portion 300. It has at least one reinforcing portion (first reinforcing portion 304, second reinforcing portion 305, reinforcing portion 311).

As a result, the strength of the cover member (bonnet center 25) can be reinforced, and the cover member can be prevented from being dented due to the weight of the cabin 5.
Further, the reinforcing portions 304 and 305 are the first hole edge portions 304a and 305a which are the edge portions of the through hole formed in the first wall portion 299 and the edge portion of the through hole formed in the second wall portion 300. It includes a certain second hole edge portions 304b, 305b, and rib walls 304c, 305c formed in a tubular shape connecting the first hole edge portions 304a, 305a and the second hole edge portions 304b, 305b. As a result, the cover member (mounting portion 297) can be firmly reinforced. It is also easy to mold.

Further, a sealing material (third seal 291) for sealing between the rear portion of the cabin 5 and the cover member is provided, and the reinforcing portions 304 and 305 are edges of through holes formed in the first wall portion 299. The first hole edge portions 304a, 305a and the second hole edge portions 304b, 305b, which are the edge portions of the through holes formed in the second wall portion 300, are included, and the first hole edge portions 304a, 305a are sealing materials. It is located on the indoor 5A side of the cabin 5 with respect to (third seal 291), and the second hole edge portions 304b and 305b are closed by a support portion (beam member 67). Since the first hole edge portions 304a and 305a are located in front of the sealing material (third seal 291) and in the interior 5A of the cabin 5, the inside of the reinforcing portion via the first hole edge portions 304a and 305a at the time of car washing or the like. It is possible to prevent water from entering the water. Further, since the second hole edge portions 304b and 305b are blocked by the support portion (beam member 67), the sound on the engine room E2 side is propagated to the cabin 5 side via the reinforcing portions 304 and 305. It can be suppressed.

Further, the reinforcing portions 304 and 305 have an elliptical shape that is long in the body width direction K2. By forming the reinforcing portions 304 and 305 into a long elliptical shape in the body width direction K2, the mounting portion 297 can be effectively reinforced.
Further, it has a plurality of reinforcing portions (first reinforcing portion 304, second reinforcing portion 305) provided at intervals in the body width direction K2. Thereby, the cover member (mounting portion 297) can be effectively reinforced.

Further, a first mounting member 316 for attaching the cover member to the support portion (beam member 67) and a mounting member for mounting the cover member to the support portion (beam member 67) in the width direction of the machine body with respect to the first mounting member 316. A second mounting member 319 provided at intervals in K2 is provided, and the first mounting member 316 and the second mounting member 319 are located between the first mounting portion 306 and the second mounting portion 307 and are reinforced. The portions 304 and 305 are located between the first mounting member 316 and the second mounting member 319. Thereby, the cover member (mounting portion 297) can be effectively reinforced.

Further, a rear bonnet 25 that covers the rear of the engine E1, a fixed hinge 327 fixed to the support frame 60 (aircraft 2), and a fixed hinge 327 that is fixed to the rear bonnet 25 and opens and closes the rear bonnet 25 around the vertical axis. The movable hinge 329 includes a movable hinge 329 rotatably attached to the hood and a lock lever 330 that keeps the rear bonnet 25 open, and the movable hinge 329 has a locking groove 336 through which the lock lever 330 is inserted. The lock lever 330 is pivotally supported by the base end portion 330a on the side of the fixed hinge 327 so as to swing around the horizontal axis, and is fitted into the lower edge portion 336d of the locking groove 336 so that the movable hinge 329 has the rear bonnet 25 opened. In a state where the locking portion 337 is fitted into the lower edge portion 336d of the locking groove 336, the locking portion 337 is provided, and the proximal end side is a portion closer to the proximal end side than the locking portion 337. The vertical width W2 of the portion 338 is shorter than the vertical width W1 of the locking groove 336, and the vertical width W3 of the tip side portion 339, which is a portion on the tip side of the locking portion 337, is the locking groove 336. It is longer than the width W1 in the vertical direction of.

When the lock lever 330 is pulled up and the upper end abuts on the upper edge of the locking groove 336 with the rear bonnet 25 open, the upward swing of the lock lever 330 is restricted. In this state, the lower end of the tip end side portion 339 is located below the upper surface of the lower edge portion of the locking groove 336. As a result, the movement of the movable hinge 329 in the opening direction of the rear bonnet 25 is restricted by the distal end side portion 339. That is, the rear bonnet 25 does not move further in the opening direction from the position where the movement in the opening direction is restricted by the lock lever 330, and the rear bonnet 25 can be prevented from being excessively opened.

Next, the support structure of the oil cooler O1 will be described.
As shown in FIG. 50, a partition member 341 is provided on the upper portion of the third leg 66 of the support frame 60. The partition member 341 is a member that forms a part of a partition that partitions the arrangement side of the engine E1 and the arrangement side of the radiator R1 and the oil cooler O1. The partition member 341 is fixed to a fixing plate 342 attached to the third leg 66. A shroud 343 that covers the cooling fan is provided below the partition member 341. The radiator R1 is located on the outside (right side) of the shroud 343. A support frame 344 is attached to the radiator R1.

As shown in FIG. 51, the support frame 344 connects the upper frame 345, the lower frame 346 arranged below the upper frame 345, and one ends (front end portions) of the upper frame 345 and the lower frame 346. It has one vertical frame 347 and a second vertical frame 348 that connects the other ends (rear end portions) of the upper frame 345 and the lower frame 346.
As shown in FIG. 50, the upper frame 345 is provided on the upper side of the radiator R1. The upper frame 345 has a main frame portion 349 provided along the upper portion of the radiator R1. As shown in FIG. 52, the main frame portion 349 has a side wall 350 and an upper wall 351.

As shown in FIG. 50, the side wall 350 is provided along the upper right side of the radiator R1. The front portion of the side wall 350 is fixed to the radiator R1 by the bolt 365A, and the rear portion of the side wall 350 is fixed to the radiator R1 by the bolt 365B. That is, the upper portion of the radiator R1 is fixed to the upper frame 345.
As shown in FIG. 52, the upper wall 351 extends from the front portion of the side wall 350 toward the inside of the aircraft (left) and the first portion 351a extending from the rear portion of the side wall 350 toward the inside of the aircraft (left). It has a second site 351b to be used. The upper wall 351 is located above the radiator R1 (see FIG. 50). A first extending portion 352 extending toward the inside of the aircraft is provided at the front portion of the first portion 351a. The first stay portion 353 extends upward from the extending end portion of the first extending portion 352. The first stay portion 353 is fixed to the boss portion 388 provided on the partition member 341 by bolts 354A.

A second extending portion 355 extending toward the inside of the aircraft is provided at the rear portion of the second portion 351b. The second stay portion 356 extends upward from the extending end portion of the second extending portion 355. The second stay portion 356 is fixed to the boss portion 389 provided on the partition member 341 by bolts 354B. The upper frame 345 is attached to the support frame 60 by the first stay portion 353 and the second stay portion 356.

As shown in FIG. 50, the lower frame 346 is provided on the lower side of the radiator R1. As shown in FIG. 51, the lower frame 346 has a first wall 346a, a second wall 346b, a third wall 346c, a fourth wall 346d, and a fifth wall 346e. As shown in FIG. 50, the first wall 346a is provided along the lower right side of the radiator R1. The front and rear portions of the first wall 346a are fixed to the radiator R1 by bolts 385A and 385B. As a result, the lower frame 346 is fixed to the lower part of the radiator R1. The lower portion of the radiator R1 is supported by a mounting member 359 provided on the swivel frame 54 via a vibration isolator member 358 (rubber) (see FIGS. 3 and 7). As a result, the lower frame 346 is supported on the body 2 side via the radiator R1.

The second wall 346b extends toward the inside of the aircraft from the front end of the first wall 346a. The third wall 346c extends rearward from the extending end of the second wall 346b. The fourth wall 346d extends toward the inside of the aircraft from the rear end of the first wall 346a. The fifth wall 346e extends rearward from the extending end of the fourth wall 346d.
The upper frame 345 is attached to the support frame 60, and the lower frame 346 is supported on the body 2 side via the radiator R1, so that the support frame 344 is supported on the body 2 side.

As shown in FIG. 51, the first vertical frame 347 is formed in a vertically long strip shape, and the plate surface faces the front and back. The upper portion of the first vertical frame 347 is fixed to the side wall 350 of the upper frame 345 and the upper wall 351 (first portion 351a), and the lower portion is fixed to the second wall 346b of the lower frame 346. At the lower part of the first vertical frame 347, a first pivot branch (center branch) 360 projecting to the outside of the machine body is provided.

As shown in FIG. 53, the first pivot portion 360 is formed in a hook shape that opens upward, and has a first engaging groove (engagement groove) 361 that opens upward. The first engaging groove 361 has a first bottom portion (bottom portion) 361a, a first guide surface (guide surface) 361b, and a first vertical surface (vertical surface) 361c. The first bottom portion 361a is formed in a downwardly concave curved shape. A pivot shaft 362 provided at the lower part of the oil cooler O1 is rotatably supported around the axis center of the first bottom portion 361a. The first guide surface 361b is an end portion of the first bottom portion 361a and extends upward from the base side end portion (the end portion on the machine body side side) of the first pivot support portion 360. Further, the first guide surface 361b is an inclined surface that is inclined so as to move away from the radiator R1 as it goes downward, and the lower portion is continuous with the first bottom portion 361a. The first vertical surface 361c is an end portion of the first bottom portion 361a, and is upward (approximately vertical direction) from the end portion (the end portion on the outer side of the machine body) opposite to the base side of the first pivot branch portion 360. It is an extending surface.

As shown in FIG. 51, the second vertical frame 348 is formed in a vertically long strip shape, and the plate surface faces the front and back. The upper portion of the second vertical frame 348 is fixed to the side wall 350 of the upper frame 345 and the upper wall 351 (second portion 351b), and the lower portion is fixed to the fourth wall 346d of the lower frame 346. At the lower part of the second vertical frame 348, a second pivot branch (center branch) 363 projecting to the outside of the machine body is provided.

As shown in FIG. 53, the second pivot portion 363 is formed in a hook shape that opens upward, and has a second engaging groove (engagement groove) 364 that is formed in an open shape upward. The second engaging groove 364 has a second bottom portion (bottom portion) 364a, a second guide surface (guide surface) 364b, and a second vertical surface (vertical surface) 364c. The second bottom portion 364a is formed in a downwardly concave curved shape. Further, the pivot shaft 362 is also rotatably supported around the axis center of the second bottom portion 364a. The second guide surface 364b is an end portion of the second bottom portion 364a and extends upward from the base side end portion (the end portion on the machine body side side) of the second pivot branch portion 363. Further, the second guide surface 364b is an inclined surface that is inclined so as to move away from the radiator R1 as it goes downward, and the lower portion is continuous with the second bottom portion 364a. The second vertical surface 364c is an end portion of the second bottom portion 364a, and is upward (approximately vertical direction) from the end portion (the end portion on the outer side of the machine body) opposite to the base side of the second pivot branch portion 363. It is an extending surface.

The pivotal support that pivotally supports the pivotal axis 362 includes a first pivotal branch 360 provided in the first vertical frame 347 and a second pivotal branch 363 provided in the second vertical frame 348.
As shown in FIG. 50, the upper portion of the shroud 343 is bolted to the first stay portion 353 and the second stay portion 356. The lower part of the shroud 343 is bolted to the third wall 346c and the fifth wall 346e. Therefore, the support frame 344 supports the shroud 343.

As shown in FIGS. 51 and 53, a first lower bracket 366, a second lower bracket 367, and a third lower bracket 368 are provided on the lower portion (lower end surface) of the oil cooler O1. The first lower bracket 366 is provided from the front and rear central portions of the oil cooler O1 toward the front portion. The second lower bracket 367 is provided closer to the rear from the central portion in the front and rear of the oil cooler O1. The front portion of the third lower bracket 368 is fixed to the first lower bracket 366 by bolts 390A. The rear portion of the third lower bracket 368 is fixed to the second lower bracket 367 by bolts 390B.

A pivot 362 having an axial center extending in the front-rear direction K1 is fixed to the third lower bracket 368. The central portion of the pivot axis 362 in the front-rear direction K1 is fixed to the third lower bracket 368, and projects forward and backward from the third lower bracket 368. The front portion of the pivot 362 is inserted from above into the first engagement groove 361 of the first pivot 360. That is, the pivot 362 is rotatably fitted around the axis center of the first bottom portion 361a of the first engaging groove 361. Further, the rear portion of the pivot shaft 362 is inserted from above into the second engaging groove 364 of the second pivot support portion 363. That is, the pivot 362 is rotatably fitted around the axis center of the second bottom portion 364a of the second engaging groove 364. In other words, the pivot 362 is provided below the oil cooler O1 (heat exchanger) and is pivotally supported by the first pivot 360 (first bottom 361a) and the second pivot 363 (second bottom 364a). The axis.

As shown in FIG. 53, a first regulating member 369 is provided at the front portion of the pivot 362. The first regulating member 369 is formed in the shape of a ring disk, and is fitted and fixed to the pivot shaft 362. The first regulating member 369 regulates the forward movement of the pivot shaft 362 (oil cooler O1) by abutting on the rear surface of the first pivot branch 360. A second regulating member 370 is provided at the rear of the Axis 362. The first regulating member 369 is formed in the shape of a ring disk, and is fitted and fixed to the pivot shaft 362. The second regulating member 370 regulates the backward movement of the pivot shaft 362 (oil cooler O1) by abutting on the front surface of the second pivot branch 363.

With the above configuration, the lower part of the oil cooler O1 is pivotally supported by the support frame 344 (first pivot branch 360, second pivot branch 363) so that the upper portion moves in the direction of approaching and separating from the radiator R1. .. As a result, the oil cooler O1 separates from the radiator R1 around the first pivot branch 360 and the second pivot branch 363 in the facing posture 371 (see the virtual line in FIG. 54) in which the oil cooler O1 faces the radiator R1. The posture can be changed to the tilted posture 372 (see the solid line in FIG. 54), which is a state of being tilted in the direction.

As shown in FIGS. 51 and 52, a first upper bracket 373 and a second upper bracket 374 are provided on the upper portion (upper end surface) of the oil cooler O1. The first upper bracket 373 is provided on the front portion of the oil cooler O1. The first upper bracket 373 is provided with a first mounting piece portion 373a. The second upper bracket 374 is provided at the rear of the oil cooler O1. The second upper bracket 374 is provided with a second mounting piece portion 374a.

As shown in FIGS. 51 and 52, a mounting member 376 made of a plate material is attached to the first mounting piece portion 373a and the second mounting piece portion 374b. That is, the mounting member 376 is mounted on the upper part of the oil cooler O1 (heat exchanger).
As shown in FIG. 52, the mounting member 376 has a first wall portion 376a, a second wall portion 376b, and a third wall portion 376c. The first wall portion 376a is arranged sideways with the plate surface facing upward, and is arranged between the first mounting piece portion 373a and the second mounting piece portion 374b. The second wall portion 376b extends upward from the front portion of the first wall portion 376a. Second wall part 376b
The front portion of the above is overlapped with the first mounting piece portion 373a and fixed to the first mounting piece portion 373a with bolts 391A (see FIG. 50). The third wall portion 376c extends upward from the rear portion of the first wall portion 376a. The rear portion of the third wall portion 376c is overlapped with the second mounting piece portion 374b and fixed to the second mounting piece portion 374b by bolts 391B (see FIG. 50).

As shown in FIG. 52, the mounting member 376 is provided with a handle 376d. The handle 376d includes a root portion 376e extending outward from the center side of the outer end of the first wall portion 376a and a grip portion extending rearward from the extending end of the root portion 376e. It has a 376f and a grip cover 376g that covers the grip portion 376f. The first wall portion 376a is located above the upper surface of the oil cooler O1, and the grip portion 376f protrudes to the outside of the machine body from the oil cooler O1.

A fixing member 377 is fixed to the central portion of the upper surface of the first wall portion 376a in the front-rear direction of the machine body. The fixing member 377 is located on the front side of the root portion 376e of the handle 376d. The fixing member 377 is formed in a square block shape, and a screw hole 378 is formed on the rear side of the upper portion.
As shown in FIGS. 51 and 52, a guide member 379 made of a plate material is provided on the support frame 344 (upper frame 345). The base end of the guide member 379 is fixed to the main frame portion 349 of the upper frame 345, and protrudes outward from the main frame portion 349. That is, the guide member 379 protrudes from the support frame 344 to the side where the oil cooler O1 is tilted. The guide member 379 has a guide groove 380. The guide groove 380 is a long groove long in the projecting direction (machine width direction K2) of the guide member 379. The guide groove 380 is formed from the center of the guide member 379 in the width direction of the machine body K2 toward the outside of the machine body. The guide groove 380 is formed by an annular edge formed by penetrating the guide member 379 back and forth.

As shown in FIG. 55, the guide groove 380 has a first guide portion 381 on the proximal end side of the guide member 379 and a second guide portion 382 on the distal end side of the guide member 379. The first guide portion 381 is formed to have a shorter distance than the second guide portion 382. The first guide portion 381 and the second guide portion 382 are continuously formed. The first guide portion 381 is formed in an inclined direction in which the guide member 379 shifts upward from the base end in the projecting direction toward the projecting direction. The second guide portion 382 is formed in an inclined direction in which the second guide portion 382 shifts downward from the first guide portion 381 toward the tip portion in the protruding direction.

As shown in FIGS. 51 and 52, a fixture 383 for fixing the fixing member 377 to the guide member 379 is provided. The fixture 383 is composed of a single bolt. A plurality of fixtures 383 and guide members 379 may be provided. The fixture 383 has a head portion 383a and a screw shaft portion 383b. A washer 384 is inserted through the screw shaft portion 383b. Further, the screw shaft portion 383b is screwed into the screw hole 378 of the fixing member 377 through the guide groove 380. That is, the fixture 383 is screwed to the fixing member 377 through the guide groove 380. The shape of the head 383a is not particularly limited, and may be, for example, a hexagon bolt shape, a thumbscrew shape, or the like.

As shown in FIG. 55, the screw shaft portion 383b of the fixture 383 can move in the guide groove 380 in the groove longitudinal direction. The fixing member 377 and the fixture 383 have a first position 386 (see virtual line) in which the screw shaft portion 383b is located at the base end of the guide groove 380, and a second position in which the screw shaft portion 383b is located at the tip of the guide groove 380. It can be moved to 387 (see solid line). In the state where the fixing member 377 and the fixing tool 383 are located at the first position 386, the oil cooler O1 is in the facing posture 371 shown by the virtual line. In the state where the fixing member 377 and the fixing tool 383 are located at the second position 387, the oil cooler O1 is in the tilted posture 372 shown by the solid line. As described above, the guide groove 380 has the first position 386, which is the position where the oil cooler O1 faces the radiator R1 (opposing posture 371), and the state where the oil cooler O1 is tilted around the pivot in the direction away from the radiator R1. The fixing member 377 (fixing tool 383) can be guided to the second position 387, which is the position of the (tilting posture 372). Further, the base end 381a of the first guide portion 381 holds the fixing member 377 and the fixing tool 383 at the first position 386, and the tip end portion 382a of the second guide portion 382 holds the fixing member 377 and the fixing tool 383 second. Hold at position 387.

The length of the first guide portion 381 (the depth from the lower connection portion to the bottom of the first guide portion 381 and the second guide portion 382 when the oil cooler O1 is arranged in the opposite posture) is fixed. It may be longer than the radius of the screw shaft portion 383b of the tool 383. As a result, when the oil cooler O1 is arranged in the opposite posture, the position of the center of gravity of the screw shaft portion 383b is lower than the lower connection portion between the first guide portion 381 and the second guide portion 382. The 383 can be reliably held by the first position 386.

When the oil cooler O1 is normally used, the oil cooler O1 is set to the facing posture 371, and the fixture 383 is tightened to the fixing member 377 at the first position 386 to fix the oil cooler O1 in the facing posture 371.
When checking the clogging of the fins of the radiator R1 or cleaning the fins, the fixing tool 383 is released (loose) from the fixing member 377. After that, the handle 376d is grasped and the oil cooler O1 is pulled up and tilted away from the radiator R1. When the screw shaft portion 383b of the fixture 383 gets over the convex portion of the boundary between the first guide portion 381 and the second guide portion 382, the screw shaft portion 383b is guided to the second guide portion 382 on the downhill naturally. And move to the second position 387. By holding the fixture 383 in the second position 387, the oil cooler O1 is held in the tilted posture 372. This oil cooler O1 posture change operation can be performed in a short time by loosening one bolt (fixing tool 383), and the maintenance work of the radiator R1 can be shortened.

In the present embodiment, the working machine 1 includes the machine body 2, the radiator R1 mounted on the machine body 2, a heat exchanger (oil cooler O1) arranged to face the radiator R1, and a heat exchanger (oil cooler O1). ), At least one pivot (first pivot 360, second pivot 363) that rotatably supports the lower part around the horizontal axis, a support frame 344 that supports the upper part of the heat exchanger, and a support frame 344. A guide member 379 provided in the center and having a guide groove 380, a fixing member 377 provided on the upper part of the heat exchanger (oil cooler O1), and a fixing screwed to the fixing member 377 through the guide groove 380. The guide groove 380 is provided with the tool 383, the first position 386 in which the heat exchanger (oil cooler O1) faces the radiator R1, and the upper part of the heat exchanger (oil cooler O1) from the radiator R1 around the pivot. The fixing member 377 is guided to and from the second position 387 tilted in the away direction.

According to this configuration, at the first position 386, when the fixing member 383 is released from the fixing member 377 and the heat exchanger is tilted around the pivot portion in a direction away from the radiator R1, the fixing member 377 (and the fixing tool 388) is tilted. Is guided from the first position 386 to the second position 387 by the guide groove 380. Further, the fixing member 377 (and the fixture 383) is held at the second position 387 by the guide groove 380, so that the heat exchanger is held in a tilted state in the direction away from the radiator R1. As a result, the tilted state of the heat exchanger can be easily maintained.

Further, only one fixing tool 383 is provided, and by switching the screwing state of one fixing member 377, it is possible to switch between a state of restraining the movement of the fixing member 377 along the guide groove 380 and a state of allowing the movement of the fixing member 377.
According to the above configuration, the heat exchanger can be tilted only by loosening one fixture 383, so that the work of tilting the heat exchanger can be easily performed.

Further, the guide member 379 protrudes from the support frame 344 to the side where the heat exchanger (oil cooler O1) is tilted, and the guide groove 380 is the base end in the protruding direction in which the guide member 379 protrudes from the support frame 344. A first guide portion 381 formed in an inclined direction that shifts upward as it goes from the first guide portion 381 to a protruding direction, and a second guide formed in an inclined direction that shifts downward from the first guide portion 381 toward the tip portion in the protruding direction. The base end 381a of the first guide portion 381 holds the fixture 383 at the first position 386, and the tip portion 382a of the second guide portion 382 moves the fixture 383 to the second position 387. Hold.

According to this, since the first guide portion 381 of the guide groove 380 has an inclined shape that shifts upward from the base end in the projecting direction, the fixing tool 383 is released from the fixing member 377 at the first position 386. Even so, the heat exchanger does not accidentally fall over. Further, at the first position 386, it is not necessary to hold the heat exchanger when releasing the fixing of the fixture 383 to the fixing member 377. Further, since the second guide portion 382 has an inclined shape that shifts downward from the first guide portion 381 toward the tip portion in the protruding direction, the heat exchanger accidentally moves from the tilted state to the radiator R1 side. Can be prevented.

Further, a pivot shaft 362 provided at the lower part of the heat exchanger (oil cooler O1) and pivotally supported by the first pivot branch 360 and the second pivot branch 363 is provided, and the first pivot branch 360 and the second pivot branch 363 are provided. The first engaging groove 361 and the second engaging groove 364 into which the pivot 362 is inserted from above are formed so as to be open upward, and the first engaging groove 361 and the second engaging groove 364 are The first bottom portion 361a and the second bottom portion 364a in which the pivot shaft 362 is rotatably fitted around the axis center, and the lower portion is inclined so as to move away from the radiator R1 as it goes downward, and the lower portion is the first bottom portion 361a and the second bottom portion 364a. It has a first guide surface 361b and a second guide surface 364b that are continuous with the first guide surface 361b.

According to this, when the pivot 362 is inserted into the first engagement groove 361 and the second engagement groove 364 from above, the pivot 362 is guided by the first guide surface 361b and the second guide surface 364b to perform the first engagement. It can be easily inserted into the first bottom portion 361a of the groove 361 and the second bottom portion 364a of the second engaging groove 364. This makes it easy to pivot the lower part of the heat exchanger to the first pivot branch 360 and the second pivot branch 363.

Further, a support frame 60 erected on the machine body 2 is provided, and the support frame 344 is provided on the upper side of the radiator R1, and the upper portion of the radiator R1 is fixed, and the upper frame 345 is attached to the support frame 60. A lower frame 346 provided on the lower side of the radiator R1 and fixed to the lower part of the radiator R1, a first vertical frame 347 connecting one ends of the upper frame 345 and the lower frame 346, and an upper frame 345 and a lower frame. It has a second vertical frame 348 that connects the other ends of the 346 to each other, a guide member 379 is provided on the upper frame 345, and a pivot portion is a first pivot portion 360 provided on the first vertical frame 347. And a second pivot 363 provided in the second vertical frame 348.

As a result, the support frame 344 can be firmly configured.
Further, it includes a mounting member 376 that is mounted on the upper part of the heat exchanger (oil cooler O1) and fixes the fixing member 377, and a handle 376d provided on the mounting member 376. By having the handle 376d, the posture change operation of the heat exchanger can be easily performed. Further, the structure is simplified by providing the fixing member 377 and the handle 376d on the mounting member 376 mounted on the upper part of the heat exchanger, that is, by providing the fixing member 377 and the handle 376d on the same member. Can be done.

Further, the body 2, the radiator R1 mounted on the body 2, the heat exchanger (oil cooler O1) arranged to face the radiator R1, and the lower part of the heat exchanger O1 can be rotated around the horizontal axis. At least one supporting pivot (first pivot 360, second pivot 363), a support frame 344 that supports the upper part of the heat exchanger O1, and a fixture 383 that fixes the heat exchanger O1 to the support frame 344. The fixture 383 is provided with only one fixture 383, and the fixture 383 is in a state where the heat exchanger O1 is fixed to the support frame 344 and is released from the fixing to the support frame 344 so that the heat exchanger O1 can be tilted. It is possible to switch to the state of

In the present embodiment, the heat exchanger O1 is provided with a fixing member 377, and the fixture 383 is inserted into the guide groove 380 of the guide member 379 fixed to the support frame 344 and screwed to the fixing member 377 to exchange heat. The configuration for fixing the vessel O1 to the support frame 344 has been described, but the present invention is not limited to this. For example, a fixing member 377 is provided on one of the support frame 344 or the heat exchanger O1, and an insertion portion (for example, a hole or a U groove) through which the fixture 383 is inserted is provided on the other side, and the fixture 383 is inserted into the insertion portion. It may be attached to the fixing member 377.

Next, the floor mat 32 will be described.
As shown in FIGS. 6 and 56, the front lower frame 52 of the cabin 5 has a front horizontal member (horizontal member) 396, a first front assembly portion 397, and a second front assembly portion 398. .. The front horizontal member 396 is provided between the lower ends of the first front strut portion 77 and the second front strut portion 78. The first front assembly portion 397 is formed of a plate material and is provided on the lower left side of the front horizontal member 396. The first front mount 48 is assembled to the first front assembly portion 397. 2nd front assembly part 3
98 is formed of a plate material and is provided on the lower right side of the front horizontal member 396. The second front mount 49 is assembled to the second front assembly portion 398.

As shown in FIGS. 57 and 61, the front horizontal member 396 is formed into a deformed tubular body by, for example, extruded shaped steel. The front horizontal member 396 includes a front wall 399, a rear wall 400, an upper wall 401, an intermediate wall 402, a first lower wall 403, a second lower wall 404, and an extension wall 405. The front wall 399 is located in the outdoor 5B of the cabin 5, and the rear wall 400 is located in the indoor 5A of the cabin 5. The rear wall 400 has an upper upper portion 400a and a lower lower portion 400b. The vertical width of the upper portion 400a is formed to be narrower than the vertical width of the lower portion 400b. Further, the rear wall 400 is formed in a stepped shape in which the upper portion 400a is located closer to the room 5A than the lower portion 400b. Therefore, the rear wall 400 has a step 400c between the upper portion 400a and the lower portion 400b. The indoor 5A side of the upper portion 400a and the lower portion 400b is formed on a flat surface.

The upper wall 401 connects the upper ends of the front wall 399 and the rear wall 400 to each other. An upwardly open groove 406 is provided in the middle of the upper wall 401. The lower end of the windshield 407 is inserted into the groove 406 together with the sealing material 408. The intermediate wall 402 is provided between the front wall 399 and the rear wall 400. Further, the intermediate wall 402 is provided near the front wall 399. The first lower wall 403 connects the front wall 399 and the lower end of the intermediate wall 402, and projects rearward from the intermediate wall 402. The second lower wall 404 is located above the first lower wall 403 and connects the lower part of the intermediate wall 402 and the lower end of the rear wall 400. The extending wall 405 extends downward from the lower end of the front wall 399.

As shown in FIGS. 57 and 61, the first front assembly portion 397 is inserted and fixed between the first lower wall 403 and the second lower wall 404. The first front assembly portion 397 projects rearward from the lower end of the rear wall 400. The first front mount 48 has a first anti-vibration member (rubber) 409, a second anti-vibration member (rubber) 410, a holding plate 411, and a backing plate 412. The first anti-vibration member 409 is located on the upper side of the first front assembly portion 397, and the second anti-vibration member 410 is located on the lower side of the first front assembly portion 397. The presser plate 411 is located on the upper surface of the first anti-vibration member 409, and the backing plate 412 is located on the lower surface of the first front assembly portion 397. The first front mount 48 is assembled to the first mount mounting portion 72 and the first front assembly portion 397 by a bolt (stud bolt) 413, a first nut 414, a second nut 415, and a third nut 416. The bolt 413 penetrates the first front mount 48 and the first mount mounting portion 72 in the vertical direction. The first nut 414 is screwed to the lower end side of the bolt 413. The second nut 415 and the third nut 416 are screwed onto the upper part of the bolt 413.

Further, the second front assembly portion 398 is inserted and fixed between the first lower wall 403 and the second lower wall 404 in the same manner as the first front assembly portion 397. Further, since it is configured in the same manner as the second front mount 49, the description thereof will be omitted.
As shown in FIGS. 57 and 61, a first notched edge (opening) 417 is formed in a portion of the front horizontal member 396 corresponding to the first front mount 48. .. The first notched edge portion 417 is an opening edge portion formed by cutting out the front horizontal member 396 so that the front horizontal member 396 does not interfere with the first front mount 48. That is, the front horizontal member 396 has an opening (cover target portion) formed by cutting out a portion corresponding to the first front mount 48 (front mount member). The first notched edge portion 417 is continuously formed from the upper portion 400a (position above the step portion 400c) of the rear wall 400 to the front end of the second lower wall 404. The front portion of the first anti-vibration member 409, the front portion of the presser plate 411, and the front portion of the second nut 415 and the third nut 416 are located in the first notched edge portion 417.

As shown in FIG. 56, a second notch edge portion (opening) 418 is provided at a portion on the right side of the front horizontal member 396 corresponding to the second front mount 49. The second notched edge portion 418 is an opening edge portion formed by cutting out the front horizontal member 396 so that the front horizontal member 396 does not interfere with the second front mount 49. That is, the front horizontal member 396 has an opening (cover target portion) formed by cutting out a portion corresponding to the second front mount 49 (front mount member). The structure of the second notch edge portion 418 is substantially the same as that of the first notch edge portion 417.

As shown in FIG. 56, a floor portion 419 is provided behind the front lower frame 52. The floor portion 419 is formed by combining a plurality of plate materials, and is attached to the front portion of the swivel frame 54 shown in FIG. 7. As shown in FIG. 4, the floor portion 419 is provided between the seat base 31 and the front lower frame 52 in the machine body 2. As shown in FIG. 58, a floor mat 32 is laid on the floor portion 419.

The floor mat 32 is provided between the lower end of the seat base 31 and the lower end of the front lower frame 52 in the machine body 2.
As shown in FIGS. 58 and 59, the floor mat 32 has a mat main body 420, a first cover portion 421, and a second cover portion 422. The mat body 420, the first cover portion 421, and the second cover portion 422 are integrally formed of an elastic member such as rubber. The floor mat 32 is molded by a molding die (mold). The mat body 420 is a portion laid over substantially the entire area of the floor portion 419. The first cover portion 421 is provided on the left side of the front portion of the mat body 420. The first cover portion 421 corresponds to the first notch edge portion 417, and is a portion that covers (closes) the first notch edge portion 417 from the indoor 5A side. That is, the first notch edge portion 417 (notch edge portion) is a cover target portion covered (closed) by the first cover portion 421. The second cover portion 422 is provided on the right side of the front portion of the mat body 420. The second cover portion 422 corresponds to the second notch edge portion 418, and is a portion that covers (closes) the second notch edge portion 418 from the indoor 5A side. That is, the second notch edge portion 418 (notch edge portion) is a cover target portion covered (closed) by the second cover portion 422.

The solid lines in FIGS. 64 and 65A show the state of the first cover portion 421 in a state where the floor mat 32 is not laid on the floor portion 419. When the floor mat 32 is not laid on the floor portion 419, the first cover portion 421 is in a state shown by a solid line in FIGS. 64 and 65A. When the floor mat 32 is laid on the floor portion 419, as shown by a virtual line in FIG. 65A, the first cover portion 421 and the second cover portion 422 are raised upward, and the floor mat 32 is placed on the floor portion 419. Lay.

As shown in FIGS. 58 and 60, when the floor mat 32 is laid on the floor portion 419, the first cover portion 421 and the second cover portion 422 are the front horizontal member 396 (the lower portion of the front portion 40 of the cabin 5). ), And is held in the upright state. Therefore, FIGS. 59, 62, and 63 show a state in which the floor mat 32 is laid on the floor portion 419.
As shown in FIG. 59, a first front mounting portion 423L is provided on the outer side of the body of the first cover portion 421. A second front mounting portion 424L is provided on the side of the first cover portion 421 toward the inside of the machine. The first front mounting portion 423R is also provided on the outer side of the second cover portion 422. A second front mounting portion 424R is also provided on the side of the second cover portion 422 toward the inside of the machine.

As shown in FIG. 63, the first front mounting portion 423L is mounted on the first front mounting portion 397. The second front mounting portion 424L is mounted on the floor portion 419. Further, the first front mounting portion 423R is mounted on the second front mounting portion 398. The second front mounting portion 424R is mounted on the floor portion 419.
Since the configuration of the second cover portion 422 is the same as that of the first cover portion 421, the first cover portion 421 will be described in the following description, and the description of the second cover portion 422 will be omitted.

As shown in FIGS. 62 to 65B, the first cover portion 421 includes a first cover wall portion 426, a hinge portion 427, a second cover wall portion 428, a third cover wall portion 429, and a connecting wall portion 430. And a reinforcing rib wall 431.
As shown in FIG. 64, the first cover wall portion 426 is formed in a rectangular plate shape. The first cover wall portion 426 has one side portion (rear edge portion) 426a connected to the mat body 420, the other side portion 426b facing the one side portion 426a, and the direction along the one side portion 426a (body width direction K2). It has two facing side portions (first facing side portion 426c, second facing side portion 426d) facing each other at intervals. One of these two facing sides (outside the machine body) is referred to as a first facing side 426c, and the other (side inside the machine) is referred to as a second facing side 426d.

As shown in FIG. 65A, the one side portion 426a is connected to the mat main body 420 via the hinge portion (connecting portion) 427. The mat body 420 is provided with a rising wall 420b that rises from the front portion of the bottom wall 420a. At the upper end of the rising wall 420b, an extending wall 420c extending forward is provided. The hinge portion 427 connects the extending wall 420c and one side portion 426a of the first cover wall portion 426. The upper surface of the hinge portion 427 and the upper surface of the first cover wall portion 426 are flush with the upper surface of the extending wall 420c (at the same height).

As shown in FIG. 59, the height of the extending wall 420c is such that the first front mounting portion 423L, 423R, the second front mounting portion 424L, 424R, and the mat body 420 rise from the trailing edge of the bottom wall 420a. The portion 420d is formed at the same height as the side portion rising portion 420e rising from the right edge of the bottom wall 420a of the mat body 420. Therefore, when the floor mat 32 is molded, the heights of the first cover portion 421 and the second cover portion 422 are the same as the height of the mat main body 420. That is, even if the first cover portion 421 and the second cover portion 422 are provided, the total thickness of the floor mat 32 (overall dimensions in the vertical direction) does not change.

As shown in FIG. 65A, the wall thickness D1 of the hinge portion 427 is thinner than the wall thickness D2 of the extending wall 420c and thinner than the wall thickness D3 of the first cover wall portion 426. That is, the hinge portion 427 has a structure that is easily elastically deformed. As a result, the first cover portion 421 is bent at the intended portion (hinge portion 427).
Further, as shown in FIG. 64, the first facing side portion 426c is separated from the first front mounting portion 423L, and the second facing side portion 426d is separated from the second front mounting portion 424L. ing. Therefore, when the first cover wall portion 426 is lifted, the hinge portion 427 elastically bends and the first cover wall portion 426 swings upward, as shown by a virtual line in FIG. 65A. That is, the hinge portion 427 can be elastically bent so as to swing the first cover wall portion 426 upward.

As shown in FIGS. 62, 63, 65A, and 65B, the second cover wall portion 428 extends downward from the first facing side portion 426c. The shape of the protruding end portion 428a, which is the protruding end of the second cover wall portion 428, is formed so as to substantially match the shape of the upper portion of the rear wall 400 of the front horizontal member 396. The wall thickness D4 of the second cover wall portion 428 is formed to be thicker than the wall thickness D3 of the first cover wall portion 426 (see FIG. 65B).

As shown in FIGS. 62, 63, 65A, and 65B, the third cover wall portion 429 extends downward from the second facing side portion 426d. The shape of the protruding end portion 429a, which is the protruding end of the third cover wall portion 429, is also formed in a shape substantially matching the shape of the upper portion of the rear wall 400 of the front horizontal member 396. The wall thickness D5 of the third cover wall portion 429 is formed to be thicker than the wall thickness D3 of the first cover wall portion 426 (see FIG. 65B).

As shown in FIGS. 62, 63, 65A, and 65B, the connecting wall portion 430 extends downward from one side portion 426a of the first cover wall portion 426, and extends downward from the second cover wall portion 428 and the second cover wall portion 428. 3 The cover wall portion 429 is connected. The connecting wall portion 430 extends in a direction substantially orthogonal to the first cover wall portion 426. An arc-shaped notch 432 is formed in the central portion between the second cover wall portion 428 and the third cover wall portion 429 in the connecting wall portion 430. The wall thickness D6 of the connecting wall portion 430 is formed to have the same thickness as the wall thickness D3 of the first cover wall portion 426 (see FIG. 65A).

As shown in FIGS. 62, 63, 65A, and 65B, the reinforcing rib wall 431 is provided between the second cover wall portion 428 and the third cover wall portion 429. In the present embodiment, the reinforcing rib wall 431 is provided at the central portion between the second cover wall portion 428 and the third cover wall portion 429. As shown in FIG. 62, the reinforcing rib wall 431 has a first connecting edge 431a connected to the first cover wall portion 426 and a second connecting edge 431b connected to the connecting wall portion 430. As shown in FIG. 65B, the wall thickness D7 of the reinforcing rib wall 431 is formed to be thicker than the wall thickness D3 of the first cover wall portion 426. Further, the wall thickness D7 of the reinforcing rib wall 431 is formed to have the same wall thickness as the wall thickness D4 of the second cover wall portion 428 and the wall thickness D5 of the third cover wall portion 429.

As shown in FIG. 61, in the state where the floor mat 32 is laid, the other side portion 426b of the first cover wall portion 426 is on the upper end side of the rear wall 400 and is closer to the upper end side of the first notched edge portion 417. It abuts on the upper side. Further, in the second cover wall portion 428, the protruding end portion 428a abuts on the rear wall 400 on the outer side of the body of the first notched edge portion 417. Further, in the third cover wall portion 429, the protruding end portion 429a abuts on the rear wall 400 on the inner side of the first notched edge portion 417. The end of the reinforcing rib wall 431 on the other side 426b side abuts on the upper portion 400a of the rear wall 400. When the first cover wall portion 426, the second cover wall portion 428, and the third cover wall portion 429 come into contact with the front lower frame 52, the first cover portion 421 is held and the upper portion of the first notched edge portion 417 is formed. It is covered (closed) by the first cover portion 421. That is, the first cover wall portion 426, the second cover wall portion 428, and the third cover wall portion 429 are covered with the hinge portion 427 elastically bent and the first cover wall portion 426 swinging upward. It is held in contact with the target portion (first notch edge portion 417, second notch edge portion 418) and closes (covers) the cover target portion.

In the present embodiment, the second cover wall portion 428 and the third cover wall portion 429 mainly come into contact with each other so as to press the upper portion 400a at the portion of the rear wall 400 that abuts on the upper portion 400a, and the lower portion 400b and the lower portion 400b The step portion 400c is in contact with the step portion 400c in a shape that follows these shapes.
As shown in FIG. 61, the upper portion of the bolt 413 and the third nut 416 are inserted into the notch 432 of the connecting wall portion 430 in a state where the first cover portion 421 closes the first notch edge portion 417. Avoids interference with.

The second cover portion 422 also has the same first cover wall portion, hinge portion, second cover wall portion, third cover wall portion, connecting wall portion, and reinforcing rib wall as the first cover portion 421.
As can be inferred from FIGS. 61 and 62, a portion extending over the first front mounting portion 423L, the second front mounting portion 424L, the first front mounting portion 423L, and the second front mounting portion 424L (mat body 420). Covers (closes) the lower part of the first notch edge 417. Further, the second notch edge portion 418 is formed by a portion (mat body 420) extending over the first front mounting portion 423R, the second front mounting portion 424R, the first front mounting portion 423R, and the second front mounting portion 424R. The lower part of the is covered (closed).

In the present embodiment, the floor mat 32 includes a floor portion 419 and a wall portion (front horizontal member 396) arranged at the peripheral edge portion of the floor portion 419, and is a part of the connection portion of the wall portion with the floor portion 419. A floor mat 32 laid on a work machine 1 having an opening (first notched edge 417, second notched edge 418), and a mat body 420 laid on the floor 419 and an opening. A cover portion (first cover portion 421, second cover portion 422) for closing the portion and a connecting portion (hinge portion 427) for flexibly connecting the cover portion to the peripheral portion (extending portion 420c) of the mat body 420 are connected. The cover portion is a first cover having a one-sided portion 426a connected to the connecting portion and a first facing side portion 426c and a second facing side portion 426d extending from both ends of the one-sided portion 426a and facing each other. It is provided with a wall portion 426, a second cover wall portion 428 extending downward from the first facing side portion 426c, and a third cover wall portion 429 extending downward from the second facing side portion 426d. The length from the connection portion to the lower end portion of the 2 cover wall portion 428 with the first facing side portion 426c and the length from the connection portion to the lower end portion of the third cover wall portion 429 with the second facing side portion 426d are , It is less than the thickness of the mat body 420.

According to the above configuration, the opening can be closed by bending the cover portion with respect to the mat body 420 at the connecting portion. Further, the height of the second cover wall portion 428 (the length from the connection portion with the first facing side portion 426c to the lower end portion) and the height of the third cover wall portion 429 (second facing) in the unbent state. Since the length from the connection part with the side part 426d to the lower end part) is less than the thickness of the mat body 420, the cover part that closes the opening (cover target part) without increasing the total thickness of the floor mat 32 is the mat body. It can be provided in 420.

Further, the connecting portion is thinner than the thickness of the peripheral portion of the mat body 420 and the thickness of the first cover wall portion 426.
As a result, the cover portion can be easily bent with respect to the mat body 420.
Further, a connecting wall portion 430 that extends downward from one side portion 426a of the first cover wall portion 426 and connects the one side portion 426a side of the second cover wall portion 428 and the third cover wall portion 429 is provided. ing.

Thereby, the strength with the cover portion (first cover portion 421, second cover portion 422) can be improved.
Further, a first connecting edge 431a provided between the second cover wall portion 428 and the third cover wall portion 429 and connected to the first cover wall portion 426 and a first connecting edge 431a connected to the connecting wall portion 430. It is provided with a reinforcing rib wall 431 having two connecting edges 431b.

Thereby, the strength of the cover portion (first cover portion 421, second cover portion 422) can be further improved.
Further, the wall thickness D4 of the second cover wall portion 428 and the wall thickness D5 of the third cover wall portion 429 are thicker than the wall thickness D3 of the first cover wall portion 426.
According to the above configuration, the strength of the cover portion (first cover portion 421, second cover portion 422) can be further improved. Thereby, for example, even when the operator steps on the first cover wall portion 426 with his / her foot, the first cover wall portion 426 can be firmly supported by the second cover wall portion 428 and the third cover wall portion 429.

Further, the working machine 1 according to the present embodiment includes the floor mat 32 described above, and the cover member bends upward at the connecting portion with respect to the cover main body to close the opening.
According to the above configuration, the cover portion that closes the opening can be provided on the mat body 420 without increasing the total thickness of the floor mat 32.
Further, the cabin 5 includes a cabin 5 having a floor portion 419 and a wall portion (front horizontal member 396), and front mount members 48 and 49 that support the front portion of the cabin 5, and the cabin 5 is a first front strut portion. It has 77 and a second front strut portion 78 provided at intervals in the machine width direction K2 with respect to the first front strut portion 77, and the wall portion includes the first front strut portion 77 and the second front strut portion 77. It has an opening (first notched edge portion 417, second notched edge portion 418) provided between the lower ends of the portion 78 and having a portion corresponding to the front mount members 48 and 49 notched.

As a result, it is possible to suppress the sound from propagating to the room 5A of the cabin 5 through the opening.
Although the present invention has been described above, it should be considered that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

2 Aircraft 5 Cabin 6 Driver's seat 37 Air conditioner 138 Seat support frame 139 Opening / closing cover 158 Operating shaft 159 Switching member 160 Operating member 161 Switching spring 162 Box body 163 Cover plate 164 1st vertical plate 164a One end of 1st vertical plate 165 2 Vertical plate 165a One end of the second vertical plate 166 One end opening (upper end opening)
167 First spring hook 168 Support groove 168a Groove bottom 168b Groove opening edge 168c Receiving surface (groove edge)
170 Shaft branch 178 Partition plate 179 Outside air intake 181 Inside air intake 182 Retaining part 185 Second spring hooking part 186 First switching position 187 Second switching position 188 Filter 189 Filter insertion part F1 Biasing force

Claims (7)

With the cabin
An air conditioner that air-conditions the cabin and
The first plate, the second plate facing the first plate, the third plate on which the first plate and the second plate are erected, one end side in the horizontal direction of the first plate, and the second plate. A fourth plate that closes between one end side in the horizontal direction of the plate and a fifth plate that closes between the other end side of the first plate in the horizontal direction and the other end side of the second plate in the horizontal direction. A box body having an opening at one end between the first plate and the upper end of the second plate and communicating with the air conditioner.
A cover plate that closes the one-end opening of the box body,
An operating shaft rotatably supported by the first plate and the second plate,
The first switching position where the air outside the cabin is taken into the air conditioner and the air inside the cabin is taken into the air conditioner by being arranged in the box body and fixed to the operation shaft and rotating the operation shaft. A switching member that can be switched to the second switching position,
An operating member fixed to one end side of the operating shaft and rotating the operating shaft,
With
The cover plate faces the first plate via at least a part of the operating member, and a retaining portion for restricting the axial movement of the operating member and the operating shaft to retain the operating shaft. Working machine with. The working machine according to claim 1, wherein the retaining portion is formed by bending a part of a plate material forming the cover plate. The first plate has a support groove that is open to the one end side of the first plate and pivotally supports one end side of the operation shaft.
The working machine according to claim 1 or 2, wherein the second plate is formed so as to penetrate the second plate and has a shaft support portion that pivotally supports the other end side of the operating shaft. A first spring hooking portion provided at one end of the first plate and
A second spring hooking portion provided on the operating member and
A switching spring hooked on the first spring hooking portion and the second spring hooking portion, and
With
The support groove is formed in an inclined shape which is located between the first spring hooking portion and the second spring hooking portion and shifts in a direction away from the first spring hooking portion toward the groove opening edge from the groove bottom. It has a receiving surface that the operation shaft comes into contact with.
By operating the operating member, the switching member is urged to the first switching position side by the switching spring, and the switching member is urged to the second switching position side by the switching spring. The working machine according to claim 3, which switches to a state. In the state where the switching member is arranged at the first switching position, the urging force of the switching spring acts in the direction of holding the switching member at the first switching position , and the switching member is arranged on the second switching position side. The working machine according to claim 4, wherein in this state, the urging force of the switching spring acts in a direction of holding the switching member in the second switching position. A partition plate which is arranged between the first plate and the second plate and has an outside air intake for taking in the outdoor air of the cabin introduced into the box body into the air conditioner is provided.
The cover plate has an inside air intake for taking air in the cabin into the air conditioner through the box body.
The claim that the switching member opens the outside air intake to close the inside air intake at the first switching position, and opens the inside air intake to close the outside air intake at the second switching position. The working machine according to any one of 1 to 5. The aircraft equipped with the cabin and
The driver's seat located in the cabin and
A seat support frame provided on the airframe, which supports the driver's seat and accommodates the air conditioner,
An opening / closing cover that covers one side of the seat support frame so that it can be opened and closed.
A filter that removes dust from the air outside the cabin before it is taken into the box body,
A filter insertion portion provided in the seat support frame and to which the filter is detachably mounted from one side of the seat support frame.
With
When the open / close cover is open, a part of the filter protrudes from the filter insertion portion, and when the open / close cover is closed, the open / close cover comes into contact with the filter to press the filter. The working machine according to any one of claims 1 to 6, which presses in a direction of inserting into an insertion portion.

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