JP6529799B2 - Small turning shovel - Google Patents

Description

  The present invention is a small turning shovel having a turning body with a small turning radius.

  In order to work in a narrow space, a so-called "small swing type shovel" is known, which is configured to reduce the swing radius ratio of the swing body. A boom is rotatably attached to the front of the swinging body of the small turning shovel, and a cabin is installed on the left side of the boom. Behind the boom, an engine as a power source is disposed. Also, around the engine, various devices and components necessary to drive the shovel are disposed. The components include a fuel tank, a hydraulic pump, a hydraulic oil tank, and parts necessary to drive the engine and the hydraulic pump. (See, for example, Patent Document 1).

JP 2000-144811 A

  The handrail is attached to the small swing type shovel so that an operator who works on the rotating body can perform a maintenance or refueling operation. The height of the handrail needs to be a predetermined height from the place where the operator places his / her foot.

  In order to obtain a handrail of such height, it is necessary to make the handrail itself a strong structure, and to make the mounting portion of the handrail a strong structure. This makes the handrail expensive.

  Therefore, one embodiment aims to provide a small swing type shovel in which a low height handrail is mounted on a component mounted on a swing body.

In order to achieve the above-mentioned object, according to one embodiment of the present invention, a fuel tank and a hydraulic oil tank mounted on an upper revolving unit, a cabin mounted on the upper revolving unit, and a rear of the cabin An mounted engine, an exhaust gas processing device for processing exhaust gas discharged from the engine, a muffler cover for covering the exhaust gas processing device, and a handrail attached to an upper surface of the fuel tank in front of the muffler cover The small swing shovel is provided, wherein the hydraulic oil tank is disposed inside the fuel tank, and the upper surface of the fuel tank is set higher than the upper surface of the hydraulic oil tank. Ru.

  According to the disclosed embodiment, a handrail that is lowered in height according to the height of the fuel tank is mounted on the top of the fuel tank. This allows the use of handrails that are not as robust as conventional handrails.

It is a side view of a small turning type shovel by one embodiment of the present invention. It is a top view of a small turning type shovel shown in FIG. It is a top view which shows the inside of a revolving super structure. It is the back side view which looked at the inside of a revolving super structure from the back of a shovel. It is a perspective view of a portion in which a fuel tank and a hydraulic fluid tank were carried in a revolving super structure. It is a perspective view of a handrail. It is a side view of a handrail. It is a perspective view which shows the state in which the handrail was brought down.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view of a small turning shovel according to one embodiment. Hereinafter, in the present specification, a small turning shovel may be referred to simply as a "shovel". The upper swing body 3 is mounted on the lower traveling body 1 of the shovel via the turning mechanism 2. A boom 4 is attached to the upper swing body 3. An arm 5 is attached to the tip of the boom 4, and a bucket 6 as an end attachment is attached to the tip of the arm 5. As the end attachment, a slope bucket, a weir bucket or the like may be used.

  The boom 4, the arm 5 and the bucket 6 constitute a digging attachment as an example of the attachment, and are hydraulically driven by the boom cylinder 7, the arm cylinder 8 and the bucket cylinder 9 respectively.

  A cabin 10 is provided on the upper revolving superstructure 3 and a power source such as an engine 11 is mounted. In the cabin 10, various operation devices required for operation of the driver's seat and the shovel, and a controller for controlling the driving of the shovel are installed.

  In FIG. 1, when the piston 9a of the bucket cylinder 9 mounted on the arm 5 is installed on the same height as the installation surface of the crawler, the uppermost portion Th1 of the handrail 70 mounted on the fuel tank 24. Is the highest position among the shovels. That is, the top Th1 of the handrail 70 is higher than the top Th2 of the handrail 60, the top Tc of the cabin, and the piping Ta to the arm cylinder 8 mounted on the boom 4.

  In addition, when the handrail 70 is rotated as described later, the uppermost part Th1 of the handrail 70 is connected to the uppermost part Th2 of the handrail 60, the uppermost part Tc of the cabin, and the arm cylinder 8 mounted on the boom 4 Will be lower than any of Ta.

  Further, the upper surface of the fuel tank 24 is higher than the muffler cover 90.

  FIG. 2 is a plan view of the shovel shown in FIG. 1 as viewed from above. The boom 4 is rotatably supported near the center of the upper swing body 3. The cabin 10 is installed on the front side of the upper swing body 3 and on the left side of the boom 4. A urea water tank cover 22 is attached to the front of the upper swing body 3 and on the right side of the boom 4 to cover a urea water tank (described later). A fuel tank 24 and a hydraulic oil tank 26 are disposed behind the urea water tank cover 22. The fuel tank 24 is disposed outside, and the hydraulic oil tank 26 is disposed inside the fuel tank 24.

  The upper surface of the urea water tank cover 22 and the upper surface of the hydraulic oil tank 26 are used as a passage for the operator to ride during maintenance or the like. On the other hand, the upper surface of the fuel tank 24 is located higher than the upper surface of the hydraulic oil tank 26 as described later, and is not used as a passage for the operator to ride.

  A handrail 60 is attached from the urea water tank cover 22 to the fuel tank 24 at the outer peripheral portion of the upper swing body 3. The handrail 60 is a rail for protecting the operator from falling when climbing on the upper swing body 3. The upper end of the handrail 60 extends to the end of the fuel tank 24. The handrail 70 extends in the extension direction of the handrail 60 from the position where the handrail 60 ends. The handrail 70 is attached to the upper surface of the fuel tank 24 and is bent inward along corners of the upper surface of the fuel tank 24. The handrail 70 is provided at a position where the operator can grip when the operator gets on the upper surface of the hydraulic oil tank 26.

  Behind the fuel tank 24 and the hydraulic oil tank 26, a muffler cover 90 is provided which covers an exhaust gas processing device described later. At a portion near the fuel tank 24 of the muffler cover 90, an exhaust pipe (muffler) 92 extending from the exhaust gas processing device protrudes.

  The urea water tank cover 22, the fuel tank 24, the hydraulic oil tank 26, the handrail 60, the handrail 70, and the muffler cover 90 are disposed on the right side of the upper swing body 3.

  The boom 4 is rotatably mounted at the center of the upper swing body 3 as described above. The shape of the rear part of the upper revolving superstructure 3 is regulated by the turning radius of the shovel, and is an arc shape of the turning radius. A counterweight 28 is disposed at the center of the rear of the upper swing body 3. The engine 11 is disposed and fixed in the space between the counterweight 28 and the boom 4. In FIGS. 1 and 2, the engine 11 does not appear because there is an engine hood 30 that covers the upper part of the engine 11.

  On the front side of the engine hood 30, there is provided a passage 32 on which the operator rides when opening the engine hood 30 and performing maintenance work on the engine 11. Also, on the front side of the passage 32, a working scaffold 34 is provided at a position lower than the passage 32. The work scaffolding 34 is provided so as to cover a swing motor disposed beside the hydraulic oil tank 26, and also functions as a swing motor cover. When a worker climbs the upper passage 32, it first rides on the lower work platform 34 and then climbs the higher passage 32. At this time, the worker can easily climb from the working scaffold 34 to the passage 32 by putting a hand on the vertically extending portion of the end portion of the handrail 70 described above.

  Next, the arrangement of each component in the upper swing body 3 will be described in more detail with reference to FIGS. 3 and 4. FIG. 3 is a plan view showing the inside of the upper swing body 3. FIG. 4 is a rear side view of the inside of the upper swing body 3 as viewed from the rear of the shovel. Note that FIG. 3 shows the inside in a simplified manner with all the covers such as the urea water tank cover 22, the muffler cover 90, and the engine hood 30 removed. Moreover, FIG. 4 has simplified and shown the component in the state which removed the counter weight 28 arrange | positioned at the back of a revolving super structure.

  As shown in FIG. 3, the urea aqueous solution tank 36 is disposed on the right of the front on the swing frame 3 a of the upper swing body 3, and the fuel tank 24 and the hydraulic fluid tank 26 are disposed behind the urea solution tank 36. Behind the urea water tank 36 and in front of the hydraulic oil tank 26, a urea water pump 38 for supplying urea water to an exhaust gas treatment apparatus described later is disposed.

  The engine 11 is disposed at the center of the rear of the upper swing body 3. An engine cooler 40 and an intercooler 42 are disposed on the side where the fan of the engine 11 is provided (left side of the engine 11). Further outside the intercooler 42, an air filter 44 for filtering the air supplied to the engine 11 is disposed. As described above, various devices attached to the engine 11 are disposed on the left side of the engine 11, and it is difficult to secure a space for arranging a large device such as an exhaust gas treatment device.

  Therefore, in the present embodiment, the exhaust gas processing device 50 is disposed above the pump chamber 150 (see FIG. 4) on the right side of the engine 11. However, since the exhaust gas processing device 50 is a relatively large device, the exhaust gas processing device 50 is disposed obliquely so that the longitudinal axis is inclined with respect to the front-rear direction of the upper swing body 3. As described above, by disposing the exhaust gas processing device 50 obliquely, the entire exhaust gas processing device 50 can be accommodated within the turning radius of the upper swing body 3 above the pump chamber 150.

  Further, by disposing the exhaust gas processing device 50 above the pump chamber 150, the exhaust gas processing device 50 can be disposed at a position relatively lower than the engine 11. For this reason, the exhaust pipe (muffler) 92 extending upward from the exhaust gas processing device 50 can be made lower than the predetermined height required for the small swing type shovel.

  Here, the exhaust gas processing device 50 will be briefly described. In the present embodiment, a diesel engine is used as the engine 11, and it is necessary to provide the exhaust gas processing device 50 in order to clear the exhaust gas regulation. The exhaust gas processing device 50 is installed in the exhaust system of the engine 11, and processes the exhaust gas of the engine to convert it into an exhaust gas that has cleared the exhaust gas regulations.

  The exhaust gas processing device 50 includes a first exhaust gas processing unit (particle filter) 50-1 and a second exhaust gas processing unit (catalytic reduction device) 50-2, and is disposed above the first exhaust gas processing unit 50-1. A second exhaust gas processing unit 50-2 is disposed. The exhaust pipe (muffler) 92 extends from the upper portion of the upper second exhaust gas processing unit 50-2.

  The exhaust gas discharged from the engine 11 is first supplied to the first exhaust processing unit 50-1. In the first exhaust treatment unit 50-1, particulates in the exhaust gas are collected by the filter device. Then, the exhaust gas from which the particulates have been removed is supplied to the second exhaust processing unit 50-2 provided with the NOx reduction catalyst. In the second exhaust treatment unit 50-2, nitrogen oxides (NOx) in the exhaust gas are reduced by the NOx reduction catalyst. The exhaust gas thus purified is released from the exhaust pipe (muffler) 92 of the exhaust gas processing device 50 to the atmosphere.

  The above-mentioned second exhaust processing unit is a catalytic reduction device, and uses urea water (urea aqueous solution) as a liquid reducing agent to continuously reduce NOx. The urea water supplied to the second exhaust treatment unit is stored in the above-described urea water tank 36, and is pressure-fed by the urea water pump 38 to the second exhaust treatment unit of the exhaust gas processing device 50.

  As described above, the exhaust gas processing device 50 is disposed above the pump chamber 150. In order to dispose the exhaust gas processing device 50 above the pump chamber 150, a house frame 100 on which the exhaust gas processing device 50 is mounted is formed on the swing frame 3 a of the upper swing body 3.

  As shown in FIG. 4, the house frame 100 has three vertical frames 100-1, 100-2, 100-3 which are leg members of the frame. The exhaust gas treatment device 50 is mounted on the horizontal frame 100-4 supported by the vertical frames 100-1, 100-2, 100-3.

  Of the three vertical frames 100-1, 100-2, 100-3, two vertical frames 100-1, 100-2 are engine support members to which the engine mount 102 for mounting the engine 11 is fixed. It is fixed to the swing frame 3 a of the upper swing body 3 via 104. Specifically, the support plate 106 is fixed between the upper end of the engine support member 104 fixed to the turning frame 3 a and the engine mount 102, and the vertical frame 100-1 is fixed to the support plate 106. Thus, the vertical frame 100-1 extends upward from the support plate 106. Vertical frame 100-2 is similarly secured to support plate 106 (not shown) and extends upwardly from support plate 106. On the other hand, the vertical frame 100-3 is directly fixed to the swing frame 3 a of the upper swing body 3.

  Thus, by using the engine support member 104 for mounting the engine 11 as a part of the vertical frames 100-1 and 100-2 of the house frame 100 for mounting the exhaust gas processing device 50, a swing frame The area of the fixed part of the frame occupied on 3a can be reduced. As a result, more devices can be mounted on the narrow swing frame 3a.

  Further, equipment disposed in the pump chamber 150 is attached to the house frame 100 for mounting the exhaust gas processing device 50. For example, the main filter that filters the fuel supplied from the fuel tank 24 to the engine 11 after being discharged from the pump is attached to the lateral frame 104 of the house frame 100. Moreover, the prefilter 54 which filters before drawing a fuel into a pump is attached to the connection member which connects two vertical flame | frames 100-2 and 100-3. An oil filter 58 for filtering hydraulic oil is attached to the vertical frame 100-3 of the house frame. A hydraulic oil pump 56 driven by the engine 11 is fixed to one end of the engine 11. Thus, the house frame 100 for mounting the exhaust gas processing device 50 is also used to fix various devices disposed in the pump chamber 150. Further, the exhaust gas treatment device 50 is not necessarily required.

  Further, the horizontal frame 100-4 is obliquely disposed so that the longitudinal axis is inclined with respect to the front-rear direction of the upper swing body 3 as in the exhaust gas processing device 50. The side surfaces in the longitudinal direction of the horizontal frame 100-4 face the side covers provided on both sides of the counterweight 28. As a result, when the worker opens the side cover, maintenance work of the filter and the like attached to the house frame 100 is facilitated.

  Next, the arrangement and configuration of the above-described fuel tank 24 and hydraulic oil pump 26 will be described with reference to FIG. FIG. 5 is a perspective view of a portion on which the fuel tank 24 and the hydraulic oil tank 26 are mounted in the upper revolving superstructure.

  As shown in FIG. 5, the fuel tank 24 and the hydraulic oil tank 26 are disposed side by side on the substantially central right of the upper swing body 3 in the front-rear direction. The fuel tank 24 is outside, and the hydraulic oil tank 26 is inside. The above-described exhaust gas processing device 50 is disposed obliquely to the rear of the fuel tank 24 and the hydraulic oil tank 26, but is covered by a muffler cover 90 and is not shown in FIG. However, the exhaust pipe (muffler) 92 extending from the exhaust gas processing device 50 penetrates the muffler cover 90 and extends upward.

  An engine hood 30 is provided next to the muffler cover 90. The engine hood 30 is a cover that covers the engine 11. When the maintenance work of the engine 11 is performed, the operator can open the engine hood 30 to access the engine 11 therein.

  Here, in the present embodiment, the upper surface of the hydraulic oil tank 26 is configured to be used as a passage through which a worker can ride. On the other hand, the upper surface of the fuel tank 24 disposed outside the hydraulic oil tank 26 is higher than the upper surface of the hydraulic oil tank 26. That is, the fuel tank 24 is formed to be higher in height than the hydraulic oil tank 26. Therefore, the fuel tank 24 can store a large amount of fuel as the height increases.

  When the fuel tank 24 is to be refilled with fuel, the operator climbs to the upper surface of the hydraulic oil tank 26 and injects fuel from the fuel supply port 24 a provided on the upper surface of the fuel tank 24. The filler opening 24 a is provided at a position inside the handrail 70 bent at about 90 degrees. Therefore, a worker who is refueling can hold the handrail 70 attached to the upper surface of the fuel tank 24 to support the body.

  Usually, a handrail such as the handrail 70 is defined to be at a predetermined height from the passage. In the case of the present embodiment, since the passage is the upper surface of the hydraulic oil tank 26, the height of the handrail 70 may be a predetermined height from the upper surface of the hydraulic oil tank 26. Therefore, the height of the handrail 70 itself may be a height obtained by subtracting the height from the top surface of the hydraulic oil tank 26 to the top surface of the fuel tank 24 from a predetermined height. That is, in the present embodiment, the height of the handrail 70 itself can be lowered by the height of the fuel tank 24. In addition, the height from the working scaffold 34 to the handrail can be secured sufficiently.

  Since the handrail 70 may have a low structure, the force (moment) applied to the attachment portion of the handrail 70 is also small, and the strength of the handrail 70 itself can be weaker than that required for the conventional handrail. This eliminates the need for the handrail 70 to be as robust as a conventional handrail. In addition, since the handrail 70 has a low structure, the force (moment) applied to the portion where the handrail 70 is attached to the fuel tank 24 is also reduced. Therefore, the mounting portion of the handrail 70 does not have to be as robust as the conventional handrail mounting structure.

  Here, the handrail 72 extends between an exhaust pipe (muffler) 92 extending upward from the muffler cover 90 at the rear of the fuel tank 24 and the fuel tank 24. That is, the exhaust pipe (muffler) 92 is disposed outside the bent handrail 70. As a result, the worker working in the vicinity of the fuel tank 24 can be protected so as not to accidentally touch the exhaust pipe (muffler) 92 heated by the engine exhaust gas.

  Also, the handrail 70 is bent approximately 90 degrees along the outer corner of the upper surface of the fuel tank 24 and extends vertically in the vicinity of the inner corner of the fuel tank 24 (see FIG. 6). (Corresponding to the vertical portion 74b-2). A worker who works while riding on a pivoting motor cover that functions as a work platform 34 can grip the vertical portion of the handrail to support the body.

  As described above, in the present embodiment, the hydraulic oil tank 26 is disposed inside the fuel tank 24, and the upper surface of the fuel tank 24 is higher than the upper surface of the hydraulic oil tank 26, whereby the passage for workers is operated. The fuel tank 24 can be enlarged to store more fuel while securing it as the upper surface of the oil tank 26. In addition to this, the handrail 70 itself and its mounting portion can be of a less rigid construction than that required for conventional handrails.

  Next, the handrail according to the present embodiment will be further described with reference to FIGS. 6 to 8. FIG. 6 is a perspective view of the handrail according to the present embodiment. FIG. 7 is a side view of the handrail according to the present embodiment. FIG. 8 is a perspective view showing a state in which the handrail according to the present embodiment is turned over. The handrail 72 shown in FIGS. 6 to 8 is slightly different in shape from the handrail 70 shown in FIG. 5, but the handrail 72 will be described as being equivalent to the handrail 70.

  As shown in FIG. 6, the handrail 72 has a rail pipe member 74 made by bending a pipe material, and two mounting portions 76. The rail pipe member 74 has a horizontal portion 74a and two vertical portions 74b-1 and 74b-2. The horizontal portion 74 a is bent at a substantially right angle along the upper corner of the fuel tank 24. Further, between the two attachment portions 76, a reinforcing pipe member 74c bent in substantially the same shape as the horizontal portion 74a is provided. Further, a vertically extending reinforcing pipe member 74 d is provided from one upper end of the mounting portion 76 to the horizontal portion 74 a of the rail pipe member 74. The reinforcing pipe member 74c is provided as needed.

  The rail plate member 74 is provided with a pivot plate 80 at each of two places of the lower end of the vertical portion 74b-1 and the lower end of the vertical portion 74b-2. Each of the two mounting portions 76 fixed to the upper surface of the fuel tank 24 has a support pipe member 77 and a support plate 78 fixed to the support pipe member 77. The cross section (outer diameter) of the support pipe member 77 is larger than the cross section (outer diameter) of the rail pipe member, and the support pipe member 77 is robust. The support pipe member 77 is not limited to a pipe member having a circular cross section, and may be a pipe member having a polygonal cross section or a member having an H-shaped cross section as long as the support pipe member 77 has sufficient strength.

  The pair of pivot plates 80 attached to the rail pipe member 74 is pivotably attached to the pair of support plates 78 by a pivot shaft 80a. Thus, the rail pipe member 74 is rotatably supported relative to the mounting portion 76. Therefore, the handrail 72 can be turned approximately 90 degrees toward the upper surface of the fuel tank 24 as shown in FIG.

  When operating the shovel, as shown in FIG. 6 and FIG. 7, the handrail 72 is fixed at a position where the vertical portions 74 b-1 and 74 b-2 are vertical. In order to fix the handrail 72, first, the bolt fixing holes 80b provided in the rotating plate 80 are aligned with one of the two bolt fixing holes 78b provided in the support plate 78. The two bolt fixing holes 78b provided in the support plate 78 are disposed equidistantly from the pivot shaft 80a that rotatably supports the pivot plate 80. Then, a bolt may be inserted through the bolt fixing hole 80b and the bolt fixing hole 80b, and a nut may be screwed into the bolt to fasten and fix the rotating plate 80 and the support plate 78.

  On the other hand, in order to fix the handrail 72 in the down position as shown in FIG. 8, first, the above-mentioned bolt is pulled out from the fixing hole 80b and the bolt fixing hole 78b to release the fixing of the handrail 72. . Then, the handrail 72 is turned inward toward the upper surface of the fuel tank 24. When the handrail 72 is turned over, the bolt fixing holes 80b provided in the pivot plate 80 align with the other of the two fixing holes 78b provided in the support plate 78. Therefore, the removed bolt may be inserted through the bolt fixing hole 80b and the bolt fixing hole 78b, and a nut may be screwed into the bolt to fasten and fix the rotating plate 80 and the support plate 78.

  In the present embodiment, one bolt fixing hole 80b is provided in the rotating plate 80, and two bolt fixing holes 78b are provided in the support plate 78. However, two bolts are fixed to the above-described rotating plate 80. The holes 80b may be provided, and the support plate 78 may be provided with one bolt fixing hole 78b.

  If the handrail 72 is configured to fall outward, the upper end of the handrail 72 will protrude to the outside of the pivot frame. In this case, the turning operation may damage surrounding objects. The handrail 72 according to the present embodiment is configured to be turned inward toward the upper surface of the fuel pump 24, thereby preventing damage to surrounding objects.

  In addition, as shown in FIG. 8, the purpose of turning down the handrail 72 is to clear the height restriction when transporting the shovel by a truck, and the handrail 72 is shown in FIGS. 6 and 7 when the shovel is operated. It is fixed in the state of standing up vertically. That is, in the state where the handrail 72 (70) is fixed in a vertically upright state, as shown in FIG. 1, the handrail 72 (70) may become the top of the shovel and may not be able to clear the height restriction. is there. Therefore, by hand over the handrail 72 (70) during transportation of the shovel, the handrail 72 (70) is prevented from exceeding the height limit.

  In the present embodiment, the handrail 72 is bent in a shape along two sides of the upper surface of the fuel tank 24. However, the handrail 72 may not be bent. For example, the horizontal portion 74 of the rail pipe 74 is from one end (a portion corresponding to the vertical portion 74b-1 in FIG. 6 (disposed near the outer edge of the fuel tank 24)) of the rail pipe member 74 in the back and forth direction of the shovel. It may be configured to extend linearly toward the other end (corresponding to the vertical portion 74b-2 in FIG. 6) closer to the working scaffold 34.

DESCRIPTION OF SYMBOLS 1 lower traveling body 2 swing mechanism 3 upper swing body 3 a swing frame 4 boom 5 arm 6 bucket 7 boom cylinder 8 arm cylinder 9 bucket cylinder 10 cabin 11 engine 22 urea water tank cover 24 fuel tank 26 hydraulic oil tank 28 counterweight 30 engine Hood 32 Passage 34 Scaffolding for work 36 Urea water tank 38 Urea water pump 40 Cooler for engine 42 Intercooler 44 Air filter 50 Exhaust gas treatment device 50-1 1st exhaust treatment unit 50-2 2nd exhaust treatment unit 54 Prefilter 56 operation Oil pump 58 Oil filter 60 Hand rail 70 Hand rail 72 Hand rail 74 Rail 76 Mounting portion 77 Support pipe member 78 Support plate 80 Rotating plate 90 SCR cover 92 Exhaust cylinder (muffler)
Reference Signs List 100 house frame 100-1, 100-2, 100-3 vertical frame 102 engine mount 104 engine support member 106 support plate 150 pump chamber

Claims (5)

A fuel tank and a hydraulic oil tank mounted on the upper swing body,
A cabin mounted on the upper swing body,
An engine mounted to the rear of the cabin,
An exhaust gas treatment device for treating an exhaust gas discharged from the engine;
A muffler cover covering the exhaust gas treatment device;
And a handrail mounted on an upper surface of the fuel tank in front of the muffler cover .
The hydraulic oil tank is disposed inside the fuel tank,
The small turning shovel according to claim 1, wherein the upper surface of the fuel tank is set higher than the upper surface of the hydraulic oil tank. It is a small turning type shovel according to claim 1,
A small turning shovel, wherein a fuel supply port is provided inside the handrail on the upper surface of the fuel tank. It is a small turning type shovel according to claim 1 or 2.
The small turning shovel, wherein a muffler for releasing engine exhaust air to the atmosphere is disposed outside the handrail. The small turning shovel according to any one of claims 1 to 3, wherein
A small swing shovel, wherein a swing motor is disposed in the vicinity of a hydraulic oil tank, and a swing motor cover functioning as a scaffold is provided above the swing motor. The small turning shovel according to any one of claims 1 to 4, wherein
It said longitudinal end of the handrail is placed on the outer edge of the fuel tank, and the other end is located closer to the work platform than the one end, the small swing radius type excavator.

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