WO2013145385A1 - Work machine - Google Patents

Work machine Download PDF

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Publication number
WO2013145385A1
WO2013145385A1 PCT/JP2012/075659 JP2012075659W WO2013145385A1 WO 2013145385 A1 WO2013145385 A1 WO 2013145385A1 JP 2012075659 W JP2012075659 W JP 2012075659W WO 2013145385 A1 WO2013145385 A1 WO 2013145385A1
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WO
WIPO (PCT)
Prior art keywords
exhaust pipe
exhaust
seat
cover
exhaust gas
Prior art date
Application number
PCT/JP2012/075659
Other languages
French (fr)
Japanese (ja)
Inventor
おさむ 國領
哲也 角野
入野　照男
川本　純也
Original Assignee
日立建機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立建機株式会社 filed Critical 日立建機株式会社
Publication of WO2013145385A1 publication Critical patent/WO2013145385A1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E02F3/325—Backhoes of the miniature type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment

Definitions

  • the present invention relates to a working machine such as a mini-excavator having a canopy and an exhaust pipe having an exhaust port for releasing an exhaust gas of an engine at a position above a revolving structure.
  • Patent Document 1 discloses a working machine such as a mini-excavator having a canopy and an exhaust pipe having an exhaust port for releasing exhaust gas of the engine at a position above the revolving structure.
  • an exhaust pipe is provided such that the exhaust port is located above the roof of the canopy.
  • Patent No. 3987895 gazette
  • the building since the exhaust pipe protrudes from the roof of the canopy, the building may be subjected to height restrictions when carrying the mini-excavator on the trailer for transportation, etc., or to perform work in the building.
  • the exhaust pipe When entering from the entrance of the building, there is a risk that the exhaust pipe will hit the upper part of the entrance and it will not be possible to enter the building.
  • the present invention has been made from the situation in the above-mentioned prior art, and its object is to reduce the flow of exhaust gas discharged from the exhaust port of the exhaust pipe toward the driver's seat and to carry the working machine.
  • An object of the present invention is to provide a working machine capable of relieving restrictions due to an exhaust pipe at the time of working in a building or in a building.
  • the present invention is provided on a revolving unit, a working device attached to the revolving unit, a driver's seat disposed on the revolving unit, and the revolving unit, and covers the upper part of the driver's seat
  • a canopy having a roof, a muffler disposed on the revolving structure, to which exhaust gas of the engine is introduced, and an exhaust pipe having an exhaust port for discharging exhaust gas discharged from the muffler at a position above the counterweight
  • the height dimension of the exhaust pipe is set to a height dimension at which the exhaust port is disposed between the top and the bottom of the roof of the canopy.
  • the exhaust gas discharged from the exhaust port of the exhaust pipe is blocked by the portion located between the top and the bottom of the roof of the canopy when the revolving structure is turned or the like. Inflow to the seat direction can be reduced.
  • the temperature of the exhaust gas discharged from the exhaust port of the exhaust pipe becomes high, but as described above, the inflow of exhaust gas to the driver's seat decreases, so the present invention It is suitable also as a working machine provided with such an exhaust gas treatment device.
  • the exhaust pipe can be prevented from protruding from the roof of the canopy, it is possible to relieve the restriction due to the height restriction received when carrying the work machine on the trailer for transportation.
  • the present invention also enables the exhaust pipe to enter the building without hitting the top of the entrance when trying to enter from the entrance of the building to perform in-building work. That is, the present invention can alleviate the restriction due to the exhaust pipe at the time of transportation of the work machine or at the time of work in the building.
  • the present invention is characterized in that, in the above-mentioned invention, the exhaust pipe is disposed such that the direction of the exhaust port is the rear or the side.
  • the exhaust gas discharge direction is the direction opposite to the driver's seat or the direction along the portion between the top and bottom of the roof of the canopy, ie, the direction different from the driver's seat direction Therefore, the inflow of the emitted exhaust gas toward the driver's seat can be reduced.
  • the present invention is characterized in that, in the above invention, the height dimension from the ground on which the work machine is installed to the exhaust port of the exhaust pipe is set to a height dimension greater than the average height of an adult.
  • the present invention thus configured can realize protection from exhaust gas to persons present around the work machine.
  • the present invention is characterized in that, in the above-mentioned invention, a flange for fixing the exhaust pipe to the upper surface of the counterweight is provided. According to the present invention thus constituted, the exhaust pipe can be stably erected and held on the upper surface of the counterweight via the flange.
  • the present invention is characterized in that, in the above invention, the exhaust pipe cover for preventing the contact with the exhaust pipe is provided.
  • the exhaust pipe cover protects an operator who may come into contact with the exhaust pipe and persons present around the work machine from coming into contact with the heated exhaust pipe. Can. Furthermore, it is particularly suitable as a working machine that is provided with an exhaust gas treatment device and the surface temperature of the exhaust pipe tends to be high.
  • the height dimension of the exhaust pipe is set to the height dimension at which the exhaust port is disposed between the top and the bottom of the roof of the canopy.
  • FIG. 1 It is a side view which shows the vehicle body of the mini shovel which comprises one Embodiment of the working machine which concerns on this invention. It is a rear view of the vehicle body with which the mini shovel shown in FIG. 1 is equipped. It is the perspective view which looked at the vehicle body of the mini shovel shown in FIG. 1 from diagonally forward. It is a top view of the vehicle body of the mini shovel shown in FIG. It is a figure which shows the positional relationship of the operator who sat at the driver's seat of the mini shovel shown in FIG. 1, a rear side left support
  • FIG. 1 is a side view showing a car body of a mini shovel constituting an embodiment of a working machine according to the present invention
  • FIG. 2 is a rear view of a car body provided in the mini shovel shown in FIG. 4 is a plan view of the body of the mini excavator shown in FIG. 1
  • FIG. 5 is an operator sitting on the driver's seat of the mini excavator shown in FIG. It is a figure which shows the positional relationship of an exhaust pipe, (a) figure is a rear view, (b) A figure is a top view.
  • the working machine comprises, for example, a mini shovel.
  • the present embodiment includes a traveling body 1, a revolving unit 2 disposed on the traveling unit 1, and a not-shown working device supported by a support portion 16 disposed on the front side of the revolving unit 2.
  • the work device includes a boom, an arm, a bucket, and the like, and can carry out a digging operation and the like of earth and sand.
  • the traveling body 1 and the revolving body 2 described above constitute a vehicle body.
  • a driver's seat 3 is disposed on the swing frame 2 a of the swing body 2, and a canopy 4 disposed to cover the driver's seat 3 is provided.
  • the canopy 4 is made of, for example, a canopy having four columns. That is, the canopy 4 includes the front right support 5 a, the front left support 5 b, the rear right support 5 c, and the rear left support 5 d.
  • the canopy 4 is provided with a roof 6 which is disposed above the columns 5 a to 5 d and covers the driver's seat 3.
  • a counterweight 7 for securing a weight balance is provided at a portion of the swing body 2 located behind the driver's seat 3.
  • an exhaust pipe 13 having an exhaust port 13a for discharging the exhaust gas of the engine at a position above the counterweight 7 is provided upright.
  • an exhaust pipe cover 21 which is disposed so as to surround the circumferential surface of the exhaust pipe 13 and which prevents contact with the exhaust pipe 13 is provided.
  • the exhaust pipe 13 and the exhaust pipe are located near the virtual straight line 18 connecting the ship point of the driver's seat 3, ie, the seat reference point 17 and the rear left support 5d.
  • a cover 21 is arranged.
  • FIG. 6 is a view for explaining the height position of the exhaust port of the exhaust pipe provided in the present embodiment.
  • the mini shovel according to the present embodiment has the height of the exhaust pipe 13 and the height 6a1 of the top 6a of the roof 6 of the canopy 4 and the height of the bottom 6b.
  • the height dimension is set to be included in the height area 23 between the height dimension 6b1. That is, the lower end of the exhaust port 13a is moved downward by the height position 6b1 of the lowermost portion 6b of the roof 6 so that the upper end of the exhaust port 13a is not positioned higher than the height position 6a1 of the top 6a of the roof 6
  • the height dimension of the exhaust pipe 13 is set so as not to be positioned.
  • the exhaust pipe 13 is disposed such that the direction of the exhaust port 13a of the exhaust pipe 13 is, for example, directed rearward.
  • the height dimension from the ground where the mini shovel is installed to the exhaust port 13a of the exhaust pipe 13 is set to a height dimension greater than the average height of an adult, for example, a height dimension greater than 170 cm.
  • FIG. 7A and 7B are diagrams showing an exhaust pipe and an exhaust pipe cover provided in the present embodiment, where FIG. 7A is a front view, FIG. 7B is a plan view, and FIG. 7C is a perspective view as viewed from the front side d)
  • FIG. 8 is a view showing an exhaust pipe and an exhaust pipe cover provided in the first embodiment, (a) a rear view, (b) a (a) view
  • the BB cross-sectional view of (c) is a CC cross-sectional view of the (a) view
  • (d) is an AA cross-sectional view of the (a) view
  • (e) is a side view.
  • the lower end of the exhaust pipe 13 has a hole communicating with the cylindrical portion of the exhaust pipe 13, and is integrally provided with a flange 19 fixed to the upper surface of the counterweight 7. It is The flange 19 is fixed to the upper surface of the counterweight 7 by a bolt 15.
  • the lower end portion of the exhaust pipe cover 21 is provided with a notch portion which forms an opening portion 30 which allows the insertion of a cleaning tool such as a brush (not shown).
  • a cleaning tool such as a brush (not shown).
  • the exhaust pipe cover 21 is disposed such that the opening 30 is located, for example, only on the driver's seat 3 side.
  • the exhaust pipe cover 21 is disposed with a gap 13 a between itself and the exhaust pipe 13.
  • the exhaust pipe covers 21 extend along the extending direction of the exhaust pipe 13 and are disposed to face each other with a gap 21 C so as to sandwich the exhaust pipe 13.
  • the first divided cover portion 21A and the second divided cover portion 21B are included.
  • the above-mentioned notches are a first notch 21A2 formed at the lower end of the first divided cover 21A, and a second notch 21B2 formed at the lower end of the second divided cover 21B. It consists of
  • the first divided cover portion 21A and the second divided cover portion 21B each have a flat plate-shaped first mounting portion 21A3 and a second mounting portion 21B3 attached to the upper surface of the counterweight 7 at lower ends thereof.
  • the attachment portions 21A3 and 21B3 are fastened together with the flange 19 of the exhaust pipe 13 by the above-described bolt 15 and fixed to the counterweight 7.
  • a large number of slits 21A1 are formed on the side surface of the first divided cover portion 21A.
  • a large number of slits are formed on the side surface of the second divided cover portion 21B.
  • FIG. 9 is an enlarged perspective view showing an upper portion of an exhaust pipe and an exhaust pipe cover provided in the present embodiment
  • FIG. 10 is a view showing a cover holding portion provided in the present embodiment
  • FIG. (B) is a perspective view showing the cover holding portion attached to the exhaust pipe
  • FIG. 11 is a view showing the cover holding portion provided in the present embodiment
  • (a) view Fig. 12 is an enlarged perspective view showing a state in which the cover holding portion is attached to the exhaust pipe
  • Fig. 12 (b) is an enlarged plan view showing the state in which the cover holding portion is attached to the exhaust pipe It is a disassembled perspective view which shows the attachment relation of an exhaust pipe cover.
  • the cover holding portion 24 for holding the exhaust pipe cover 21 on the exhaust pipe 13 is provided.
  • the cover holding portion 24 is, as shown in FIG. 11B, an annular member 24a disposed with a gap 13b with the exhaust pipe 13 so as to surround the circumferential surface of the exhaust pipe 13, and the annular member 24a is supported, and a support member described later fixed by welding, for example, around the exhaust pipe 13, a standing member fixed to the annular member 24a by welding, for example, extended in the vertical direction, and the standing member And an attachment means for attaching the exhaust pipe cover 21 thereto.
  • the annular member 24a is welded to the support member.
  • the above-described support members are composed of a pair of support members 24 b and 24 c disposed to face each other with the exhaust pipe 13 interposed therebetween.
  • the erecting members described above are disposed to face each other with the exhaust pipe 13 interposed therebetween, and each of the first divided cover portion 21A or the second divided cover portion 21B of the exhaust pipe cover 21 is attached and bent. It consists of standing members 24d and 24e.
  • the pair of support members 24 c and 24 d are disposed, for example, in the upper portion of the exhaust pipe 13. Lower portions of the pair of upright members 24d and 24e are fixed by, for example, welding to an annular member 24a supported by the support members 24c and 24d.
  • Attached members 24f and 24g having female threads are fixed to the upper portions of the upright members 24d and 24e, respectively, and corresponding bolts 25 shown in FIG. 9 are attached to the female threads of the attached members 24f and 24g.
  • the attachment members 24f and 24g and the bolts 25 constitute attachment means for attaching the first divided cover portion 21A and the second divided cover portion 21B included in the exhaust pipe cover 21 to the upright members 24d and 24e.
  • the pair of support members 24b and 24c and the pair of upright members 24d and 24e are disposed to be orthogonal to each other in plan view. Further, one cover holding portion 24 having the above-described configuration is provided, and the upper portions of the first divided cover portion 21A and the second divided cover portion 21B are held by the cover holding portion 24 as described above. Lower ends of the cover portion 21A and the second divided cover portion 21B, that is, the first and second attachment portions 21A3 and 21B3 are fixed to the counterweight 7 as described above.
  • the upper surface 7b of the counterweight 7 is formed with a hole 7C to which the exhaust gas of the engine is introduced, and a plurality of bolt holes 7b1 are formed around the hole 7C.
  • the holes 19a formed in the flange 19 of the exhaust pipe 13 and the holes formed in the first mounting portion 21A3 of the first divided cover portion 21A are fitted to the bolt holes 7b1 of the upper surface 7b of the counterweight 7, and the exhaust pipe
  • a hole 19a formed in the flange 19 of 13 and a hole formed in the second attachment portion 21B3 of the second divided cover portion 21B are fitted to the other bolt holes 7b1 on the upper surface of the counterweight 7, and
  • the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13 are fastened, and the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13 are illustrated on the counterweight 7 as shown in FIG.
  • it is fixed in a self-supporting state so as not to contact the canopy 4, and is set up and held.
  • FIG. 13 is a cross-sectional view of an essential part showing an arrangement relationship between a tail pipe and an exhaust pipe provided in the present embodiment.
  • a muffler 10 for guiding and muffling exhaust gas of an engine (not shown) and a tail pipe 11 for guiding the exhaust gas discharged from the muffler 10 are disposed.
  • a passage 7a communicating with the hole 7c of the counterweight 7 shown in FIG. 12 described above is formed in the counterweight 7.
  • the tail pipe 11 is inserted into the passage 7 a so as not to contact the wall surface of the counterweight 7 forming the passage 7 a, and the upper end 11 a is inserted into the exhaust pipe 13.
  • the exhaust gas of the engine is led to the exhaust pipe 13 through the muffler 10 and the tail pipe 11, and discharged outside from the exhaust port 13a of the exhaust pipe 13 at a position above the counterweight 7. Be done.
  • the height dimension of the exhaust pipe 13 is set to the height dimension at which the exhaust port 13a is disposed between the uppermost portion 6a and the lowermost portion 6b of the roof 6 of the canopy 4. It is Since the exhaust gas discharged from the exhaust port 13a of the exhaust pipe 13 is intercepted by the portion between the top 6a and the bottom 6b of the canopy 6 at the time of the turning of the turning body 2 and the like with this configuration, It is possible to reduce the inflow of exhaust gas in the three directions of the seat.
  • the present embodiment is also particularly suitable as a mini-excavator equipped with an exhaust gas treatment device.
  • the exhaust pipe 13 can be made not to protrude from the roof 6 of the canopy 4, relieving the restriction due to the height restriction received when the mini shovel is put on the trailer and transported. Can.
  • the exhaust pipe 13 when entering from the entrance of the building in order to carry out the work in the building, the exhaust pipe 13 is an inlet pipe as long as the height of the entrance is higher than the height of the roof 6. You can enter the building without hitting the top. That is, this embodiment can relieve the restriction by the exhaust pipe at the time of conveyance of the mini shovel, or at the time of work in the building.
  • the exhaust pipe 13 is disposed so that the exhaust port 13a is directed rearward, so the emitted exhaust gas is directed to the driver seat 3 with the discharge direction of the exhaust gas being the opposite direction to the driver seat 3. It can be prevented from flowing in the direction.
  • the height dimension from the ground on which the mini shovel is installed to the exhaust port 13a of the exhaust pipe 13 is set to a height dimension greater than the average height of an adult. It is possible to realize protection from exhaust gases for the people present.
  • the counterweight 7 is provided with a passage 7a into which the tail pipe 11 is inserted, and the upper end 11a of the tail pipe 11 is inserted into the exhaust pipe 13.
  • Exhaust gas led from the muffler 10 to the tail pipe 11 is not radiated to the wall surface forming the passage 7 a of the counterweight 7, and a gap between the tail pipe 11 and the wall surface forming the passage of the counterweight 7 Is provided.
  • the counterweight 7 is not directly heated, and the temperature rise of the counterweight 7 due to the exhaust gas can be suppressed to be low. Therefore, while the exhaust gas is released from the exhaust pipe 13, it is possible to prevent the discomfort due to the contact with the counterweight 7.
  • the exhaust pipe 13 is heated by the exhaust gas being introduced, but the radiation heat from the surface of the exhaust pipe 13 is erected behind the driver's seat 3 by the rear left support 5d. It is blocked. As a result, it is possible to prevent the operator 22 seated in the driver's seat 3 from having an unpleasant warmth due to the heat of the exhaust gas. Therefore, in the case of a working machine provided with the above-described exhaust gas processing device in which the temperature of the exhaust gas tends to be high, the surface temperature of the exhaust pipe 13 also tends to be high. As described above, the present embodiment is also suitable as a mini-excavator in which the surface temperature of the exhaust pipe 13 increases and the above-described radiation heat increases.
  • the opening 30 for permitting the insertion of the cleaning tool such as the brush is formed at the lower end portion of the first and second divided cover portions 21A and 21B included in the exhaust pipe cover 21. Since the second notches 21A2 and 21B2 are formed, dust such as dead leaves intrudes from the gap 13b between the exhaust pipe 13 and the first and second divided cover parts 21A and 21B. If the first and second divided cover portions 21A and 21B are not disassembled, the lower end portions of the first and second divided cover portions 21A and 21B are collected when they are accumulated near the lower end portions of the two divided cover portions 21A and 21B.
  • the present embodiment is also suitable as a mini-excavator that is equipped with the exhaust gas treatment device and the temperature of the exhaust gas tends to be high, and it is particularly desirable to prevent dust such as dead leaves from contacting the exhaust pipe 13 It is. Furthermore, this first embodiment is suitable for a mini-excavator often used in a work environment where waste such as dead leaves is likely to be produced, such as in a town.
  • the opening 30 formed by the first and second notches 21A2 and 21B2 of the first and second divided cover parts 21A and 21B is positioned only on the driver's seat 3 side. Because the first and second divided cover portions 21A and 21B are disposed, the opening 30 is hidden behind the driver's seat 3, thereby preventing contact with the heated exhaust pipe 13. Can.
  • a gap portion which is formed in the vicinity of the exhaust pipe 13 and the first and second divided cover portions 21A and 21B and on the driver's seat 3 side and communicates with the opening 30, ie, the driver's seat 3 and the Even when dust intrudes into the clearance formed between the first and second divided cover portions 21A and 21B, the cleaning tool such as a brush along with the dust accumulated in the clearance 30 in the clearance 30 Can be cleaned and removed.
  • the heat of the exhaust pipe 13 due to the exhaust gas can be dissipated from the gap 21C formed between the first divided cover portion 21A and the second divided cover portion 21B.
  • the heat of the exhaust pipe 13 between the pipe 13 and the first and second divided cover portions 21A and 21B can prevent the first and second divided cover portions 21A and 21B from being heated.
  • dust such as dead leaves which enter from the gap 21C of the first and second divided cover portions 21A and 21B and accumulated near the lower end portions of the exhaust pipe 13 and the first and second divided cover portions 21A and 21B is also an opening portion. It can be easily cleaned and removed by inserting a cleaning tool such as a brush at 30.
  • the exhaust pipe cover 21 including the first divided cover portion 21A and the second divided cover portion 21B can be stably erected. It can be held.
  • the support members 24b and 24c fixed to the circumferential surface of the exhaust pipe 13, the annular member 24a supported by the support members 24b and 24c, and the upright members fixed to the annular member 24a.
  • the first and second divided cover portions 21A, 21A, and 24b and the bolts 25 attach the first and second divided cover portions 21A and 21B to the erected members 24d and 24e, respectively. 21B can be stably held.
  • the heat of the exhaust pipe 13 heated by the exhaust gas is transmitted to the support members 24 b and 24 c fixed to the circumferential surface of the exhaust pipe 13, and the exhaust pipe 13 is transmitted from these support members 24 b and 24 c.
  • the two split cover portions 21A and 21B are transmitted. Therefore, the heat transferred from the exhaust pipe 13 to the support members 24b and 24c is mainly cooled after being cooled at the portion of the annular member 24a located between the support members 24b and 24c and the standing members 24d and 24e.
  • a heat insulating material or a long body is formed so as to surround the exhaust pipe 13 with the heat transmitted from the exhaust pipe 13 to the first and second divided cover portions 21A and 21B. It can be lowered without requiring a tubular member. Therefore, the safety at the time of contacting the first and second divided cover portions 21A and 21B provided in the present embodiment is secured.
  • the first and the second members are disposed via the annular member 24a disposed with a gap 13b between the exhaust pipe 13 and the first and the second embodiments without using the heat insulating material and the cylindrical member forming the long body.
  • the exhaust pipe 13 can hold the second divided cover portions 21A and 21B.
  • the first divided cover portion 21A included in the exhaust pipe cover 21 is fixed to the exhaust pipe 13 by a pair of support members 24b and 24c, and an annular member supported by the support members 24b and 24c. It can be attached to the exhaust pipe 13 via the upright member 24d of the pair of upright members 24d and 24e fixed to the annular member 24a. Further, a pair of support members 24b and 24c fixing the second divided cover portion 21B to the exhaust pipe 13, an annular member 24a supported by the support members 24b and 24c, and a standing installation provided to the annular member 24a It can be attached to the exhaust pipe 13 via the member 24e.
  • each of the pair of erected members 24d and 24c is bent, it is possible to ensure relatively high strength.
  • the first cover portion 21A and the second cover portion 21B included in the exhaust pipe cover 21 can be stably erected and held on the exhaust pipe 13.
  • the gap 21C is formed between the opposing first divided cover portion 21A and the second divided cover portion 21B, the side surfaces of the first and second divided cover portions 21A and 21B are also formed. Since the slits 21A1 and the like are formed in the above, the heat of the exhaust pipe 13 does not stay between the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13, and the heat of the exhaust pipe 13 It can be dissipated to the outside from 21 C and the slit 21 A or the like. Accordingly, the heating of the first and second divided cover portions 21A and 21B due to such stagnant heat can be suppressed.
  • the pair of support members 24b and 24c are fixed to the upper portion of the exhaust pipe 13, and the annular members 24a supported by the support members 24b and 24c are located below the pair of upright members 24d and 24e. It has a fixed configuration. With this configuration, the mounting position of the exhaust pipe cover 21 in the cover holding portion 24 can be set to a high position at the top of the exhaust pipe 13.
  • the lower part of the exhaust pipe 13 is located in the vicinity of the introduction part of the exhaust gas discharged from the muffler 10, and the temperature of the lower part becomes high due to the high temperature of the exhaust gas.
  • the temperature of the upper portion of the exhaust pipe 13 is lower than that in the lower portion due to the temperature decrease accompanying the rise of the exhaust gas.
  • the heat of the upper part of the exhaust pipe 13 whose temperature has dropped in this way is contained in the exhaust pipe cover 21 through the support members 24b and 24c, the annular member 24a, and the standing members 24d and 24e.
  • the temperature of the first and second divided cover portions 21A and 21B attached to the exhaust pipe 13 by the cover holding portion 24 can be suppressed to a relatively low level.
  • the pair of support members 24b and 24c and the pair of upright members 24d and 24e are arranged to be orthogonal to each other in plan view.
  • the first divided cover portion 21 A side and the second Since the portions of the annular member 24a positioned on the divided cover portion 21B side and the pair of standing members 24d and 24e are arranged symmetrically with respect to the above-mentioned center line, a stable weight balance on the left and right is ensured.
  • stable holding of the exhaust pipe 13 of the first and second divided cover portions 21A and 21B can be realized.
  • the heat transfer path transmitted from the support members 24b and 24c to the first divided cover portion 21A or the second divided cover portion 21B via the annular member 24a and the standing members 24d and 24e may be a relatively long path. This contributes to lowering the temperature of the first and second divided cover portions 21A and 21B.
  • the upper portions of the first and second divided cover portions 21A and 21B are held by the cover holding portion 24 and the lower portions are fixed to the counterweight 7, respectively.
  • the second divided cover portions 21A and 21B can be stably erected and held in a self-supporting state not contacting the surrounding members as described above. Therefore, the first and second divided cover portions 21A and 21B can be cooled by the air surrounding the first and second divided cover portions 21A and 21B, and the heat of the first and second divided cover portions 21A and 21B is Transmission to the surrounding members is prevented. Further, the provision of only one cover holding portion 24 which tends to increase the number of members contributes to the reduction of the manufacturing cost.
  • the exhaust pipe 13 and the exhaust pipe cover 21 are disposed in the vicinity of the virtual straight line 18 connecting the seat reference point 17 of the driver's seat 3 and the rear left support 5 d of the canopy 4
  • the exhaust pipe 13 and the exhaust pipe cover 21 may be disposed on the surface 18.
  • the said embodiment arrange
  • the exhaust pipe 13 and the exhaust pipe cover 21 are disposed on a virtual straight line connecting the seat reference point 17 of the seat 3 and the rear right support 5 c of the canopy 4 or at a position near the virtual straight line. May be Such a configuration can also ensure a good rearward visibility of an operator or the like seated in the driver's seat 3.
  • the exhaust pipe 13 is arrange
  • only one cover holding portion 24 for holding the exhaust pipe cover 21 on the exhaust pipe 13 is provided on the upper part of the exhaust pipe 13.
  • the lower end part of the exhaust pipe cover 21 is used as the counterweight 7
  • the exhaust pipe cover 21 may be configured to be held on the exhaust pipe 13 by the cover holding portions 24 provided on both the upper portion and the lower portion of the exhaust pipe 13 without being fixed.
  • the working machine which concerns on the said embodiment consists of mini shovels
  • this invention is not limited to mini shovels.
  • the present invention is also applicable to working machines such as hydraulic excavators which are larger than mini excavators.
  • Running body (vehicle body) 2 Rotating body (vehicle body) Reference Signs List 3 driver's seat 4 canopy 6 roof 6a top 6a1 height 6b bottom 6b1 height 7 counterweight 7b top 10 muffler 11 tail pipe 13 exhaust pipe 13a exhaust port 16 support 21 exhaust pipe cover 21A first division cover section 21B 2nd division cover part 22 operator

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The purpose of the present invention is to provide a work machine capable of reducing the flow towards the operator's seat of exhaust gas discharged from an exhaust port of an exhaust pipe, and capable of alleviating restrictions caused by the exhaust pipe during transportation of the work machine and during indoor work. This mini excavator comprises: a revolving body (2); a work device attached to this revolving body (2); the operator's seat (3) arranged upon the revolving body (2); a canopy (4) provided above the revolving body (2) and having a roof (6) that covers the area above the operator's seat (3); a muffler (10) arranged upon the revolving body (2) and having the engine exhaust gas guided thereto; and an exhaust pipe (13) having the exhaust port (13a) that emits the exhaust gas discharged from this muffler (10) at a position above a counterweight (7). The mini excavator has a configuration whereby the height of the exhaust pipe (13) is set to the height at which the exhaust port (13a) is arranged between the uppermost section (6a) and the lowermost section (6b) of the roof (6) of the canopy (4).

Description

作業機械Work machine
　本発明は、キャノピを備えるとともに、旋回体の上方位置でエンジンの排気ガスを放出する排気口を有する排気管を備えたミニショベル等の作業機械に関する。 The present invention relates to a working machine such as a mini-excavator having a canopy and an exhaust pipe having an exhaust port for releasing an exhaust gas of an engine at a position above a revolving structure.
　キャノピを備えるとともに、旋回体の上方位置でエンジンの排気ガスを放出する排気口を有する排気管を備えたミニショベル等の作業機械が特許文献１に開示されている。この従来技術は、排気口がキャノピのルーフの上方に位置するように排気管を設けた構成となっている。 Patent Document 1 discloses a working machine such as a mini-excavator having a canopy and an exhaust pipe having an exhaust port for releasing exhaust gas of the engine at a position above the revolving structure. In this prior art, an exhaust pipe is provided such that the exhaust port is located above the roof of the canopy.
特許第３８９７８９５号公報Patent No. 3987895 gazette
　上述した特許文献１に示される従来のミニショベルにあっては、旋回体の旋回時に排気管の排気口から放出されたエンジンの排気ガスがキャノピの開放空間から運転席に流れ込み、この排気ガスによって運転席に着座したオペレータに不快感を与える虞がある。 In the conventional mini-excavator shown in Patent Document 1 mentioned above, the exhaust gas of the engine discharged from the exhaust port of the exhaust pipe at the time of turning of the turning body flows from the open space of the canopy into the driver's seat, and this exhaust gas There is a possibility that the operator seated in the driver's seat may feel uncomfortable.
　特に昨今、排気ガス処理装置を備えた作業機械が提案されてきているが、このような排気ガス処理装置を備えていない作業機械の排気ガスの温度が３００℃程度であったものが、排気ガス処理装置を備えた作業機械の排気ガスの温度は、排気ガス処理時のＮＯｘ、ＰＭ（粒子状物質）の燃焼に伴う高熱の発生によって６００℃位まで上昇する。したがって、このような排気ガス処理装置を備えた作業機械では、より高温の排気ガスが運転室に流れ込む懸念があり、オペレータの不快感を増加させてしまうことになる。 Particularly in recent years, work machines equipped with exhaust gas treatment devices have been proposed. However, exhaust gases with a temperature of about 300 ° C. for work machines not equipped with such exhaust gas treatment devices The temperature of the exhaust gas of the working machine equipped with the processing device rises to about 600 ° C. due to the generation of high heat accompanying the combustion of NOx and PM (particulate matter) at the time of exhaust gas treatment. Therefore, in a working machine provided with such an exhaust gas treatment device, there is a concern that higher temperature exhaust gas may flow into the operator's cab, which may increase the operator's discomfort.
　また、上述した従来技術は、排気管がキャノピのルーフよりも突出しているので、トレーラに当該ミニショベルを乗せて運搬する際などに高さ規制を受けたり、建物内作業を実施するために建物の入口から進入するときに、排気管が入口の上部に当たり、建物内に進入できなくなる虞もある。 Further, in the above-mentioned prior art, since the exhaust pipe protrudes from the roof of the canopy, the building may be subjected to height restrictions when carrying the mini-excavator on the trailer for transportation, etc., or to perform work in the building. When entering from the entrance of the building, there is a risk that the exhaust pipe will hit the upper part of the entrance and it will not be possible to enter the building.
　本発明は、上述した従来技術における実状からなされたもので、その目的は、排気管の排気口から放出した排気ガスの運転席方向への流れ込みを少なくすることができるとともに、当該作業機械の運搬時や建物内作業時における排気管による制約を緩和させることができる作業機械を提供することにある。 The present invention has been made from the situation in the above-mentioned prior art, and its object is to reduce the flow of exhaust gas discharged from the exhaust port of the exhaust pipe toward the driver's seat and to carry the working machine. An object of the present invention is to provide a working machine capable of relieving restrictions due to an exhaust pipe at the time of working in a building or in a building.
　この目的を達成するために、本発明は、旋回体と、この旋回体に取り付けられる作業装置と、旋回体上に配置した運転席と、旋回体上に設けられ、上記運転席の上方を覆うルーフを有するキャノピと、上記旋回体上に配置され、エンジンの排気ガスが導かれるマフラと、このマフラから排出される排気ガスを上記カウンタウェイトの上方位置で放出させる排気口を有する排気管とを備えた作業機械において、上記排気管の高さ寸法を、上記排気口が上記キャノピの上記ルーフの最上部と最下部との間に配置される高さ寸法に設定したことを特徴としている。 In order to achieve this object, the present invention is provided on a revolving unit, a working device attached to the revolving unit, a driver's seat disposed on the revolving unit, and the revolving unit, and covers the upper part of the driver's seat A canopy having a roof, a muffler disposed on the revolving structure, to which exhaust gas of the engine is introduced, and an exhaust pipe having an exhaust port for discharging exhaust gas discharged from the muffler at a position above the counterweight In the provided work machine, the height dimension of the exhaust pipe is set to a height dimension at which the exhaust port is disposed between the top and the bottom of the roof of the canopy.
　このように構成した本発明は、旋回体の旋回時等には、排気管の排気口から放出した排気ガスがキャノピのルーフの最上部と最下部の間に位置する部分によって遮られるので、運転席方向への流れ込みを少なくすることができる。排気ガス処理装置を備えた作業機械では排気管の排気口から放出した排気ガスの温度が高くなるが、上述したように排気ガスの運転席への流れ込みが少なくなることから、本発明は、このような排気ガス処理装置を備えた作業機械としても好適である。 According to the present invention, the exhaust gas discharged from the exhaust port of the exhaust pipe is blocked by the portion located between the top and the bottom of the roof of the canopy when the revolving structure is turned or the like. Inflow to the seat direction can be reduced. In the working machine equipped with the exhaust gas treatment device, the temperature of the exhaust gas discharged from the exhaust port of the exhaust pipe becomes high, but as described above, the inflow of exhaust gas to the driver's seat decreases, so the present invention It is suitable also as a working machine provided with such an exhaust gas treatment device.
　また本発明は、キャノピのルーフから排気管を突出させないようにすることができるので、トレーラに当該作業機械を乗せて運搬する際などに受ける高さ規制による制約を緩和させることができる。また本発明は、建物内作業を実施するために建物の入口から進入しようとするときに、排気管が入口の上部に当たることなく建物内に進入することが可能となる。すなわち本発明は、当該作業機械の運搬時や建物内作業時における排気管による制約を緩和させることができる。 Further, according to the present invention, since the exhaust pipe can be prevented from protruding from the roof of the canopy, it is possible to relieve the restriction due to the height restriction received when carrying the work machine on the trailer for transportation. The present invention also enables the exhaust pipe to enter the building without hitting the top of the entrance when trying to enter from the entrance of the building to perform in-building work. That is, the present invention can alleviate the restriction due to the exhaust pipe at the time of transportation of the work machine or at the time of work in the building.
　また本発明は、上記発明において、上記排気口の向きが後方または側方となるように上記排気管を配置したことを特徴としている。このように構成した本発明は、排気ガスの放出方向が運転席とは逆の方向、またはキャノピのルーフの最上部と最下部との間の部分に沿う方向、すなわち運転席方向とは異なる方向となるので、放出した排気ガスの運転席方向への流れ込みをより少なくすることができる。 The present invention is characterized in that, in the above-mentioned invention, the exhaust pipe is disposed such that the direction of the exhaust port is the rear or the side. According to the present invention, the exhaust gas discharge direction is the direction opposite to the driver's seat or the direction along the portion between the top and bottom of the roof of the canopy, ie, the direction different from the driver's seat direction Therefore, the inflow of the emitted exhaust gas toward the driver's seat can be reduced.
　また本発明は、上記発明において、当該作業機械が設置される地面から上記排気管の上記排気口までの高さ寸法を大人の平均身長以上の高さ寸法に設定したことを特徴としている。このように構成した本発明は、当該作業機械の周囲に存在する人に対する排気ガスからの保護を実現させることができる。 The present invention is characterized in that, in the above invention, the height dimension from the ground on which the work machine is installed to the exhaust port of the exhaust pipe is set to a height dimension greater than the average height of an adult. The present invention thus configured can realize protection from exhaust gas to persons present around the work machine.
　また本発明は、上記発明において、上記排気管を上記カウンタウェイトの上面に固定するフランジを備えたことを特徴としている。このように構成した本発明は、フランジを介して排気管をカウンタウェイトの上面に安定して立設保持させることができる。 Further, the present invention is characterized in that, in the above-mentioned invention, a flange for fixing the exhaust pipe to the upper surface of the counterweight is provided. According to the present invention thus constituted, the exhaust pipe can be stably erected and held on the upper surface of the counterweight via the flange.
　本発明は、上記発明において、上記排気管への接触を防ぐ排気管カバーを備えたことを特徴としている。このように構成した本発明は、排気管カバーによって、排気管に接触する可能性のあるオペレータや、当該作業機械の周囲に存在する人が、加熱された排気管に接触しないように保護することができる。また特に、排気ガス処理装置を備え、排気管の表面温度が高くなりやすい作業機械としても好適である。 The present invention is characterized in that, in the above invention, the exhaust pipe cover for preventing the contact with the exhaust pipe is provided. According to the present invention thus configured, the exhaust pipe cover protects an operator who may come into contact with the exhaust pipe and persons present around the work machine from coming into contact with the heated exhaust pipe. Can. Furthermore, it is particularly suitable as a working machine that is provided with an exhaust gas treatment device and the surface temperature of the exhaust pipe tends to be high.
　本発明は、排気管の高さ寸法を、排気口がキャノピのルーフの最上部と最下部との間に配置される高さ寸法に設定した構成にしてある。この構成により、旋回体の旋回時等に排気管の排出口から放出した排気ガスをキャノピのルーフによって遮り、運転席方向への流れ込みを従来に比べて少なくすることができ、従来よりも優れた操作性を確保することができる。また本発明は、排気ガス処理装置を備え、排気ガスの温度が高くなりやすいミニショベルでは、高温の排気ガスが運転席方向へ放散され難いので、特に好適である。また本発明は、キャノピのルーフから排気管を突出させないようにすることができるので、従来受けていたような作業機械の運搬時や建物内作業時における排気管による制約を緩和させることができる。 In the present invention, the height dimension of the exhaust pipe is set to the height dimension at which the exhaust port is disposed between the top and the bottom of the roof of the canopy. With this configuration, the exhaust gas released from the exhaust port of the exhaust pipe can be blocked by the roof of the canopy at the time of turning of the turning body, etc., and the flow toward the driver's seat can be reduced compared to the conventional one. Operability can be secured. Further, the present invention is particularly preferable in a mini-excavator which is provided with an exhaust gas treatment device and in which the temperature of exhaust gas tends to be high, because high temperature exhaust gas is unlikely to be dissipated in the driver's seat direction. Further, according to the present invention, since the exhaust pipe can be made not to protrude from the roof of the canopy, the restriction due to the exhaust pipe at the time of transportation of the working machine and work in the building as conventionally received can be relieved.
本発明に係る作業機械の一実施形態を構成するミニショベルの車体を示す側面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the vehicle body of the mini shovel which comprises one Embodiment of the working machine which concerns on this invention. 図１に示すミニショベルに備えられる車体の背面図である。It is a rear view of the vehicle body with which the mini shovel shown in FIG. 1 is equipped. 図１に示すミニショベルの車体を斜め前方から見た斜視図である。It is the perspective view which looked at the vehicle body of the mini shovel shown in FIG. 1 from diagonally forward. 図１に示すミニショベルの車体の平面図である。It is a top view of the vehicle body of the mini shovel shown in FIG. 図１に示すミニショベルの運転席に座ったオペレータと、後側左支柱及び排気管の位置関係を示す図で、（ａ）図は背面図、（ｂ）図は平面図である。It is a figure which shows the positional relationship of the operator who sat at the driver's seat of the mini shovel shown in FIG. 1, a rear side left support | pillar, and an exhaust pipe, (a) figure is a rear view and (b) figure is a top view. 本実施形態に備えられる排気管の排気口の高さ位置を説明する図である。It is a figure explaining the height position of the exhaust port of the exhaust pipe with which this embodiment is equipped. 本実施形態に備えられる排気管及び排気管カバーを示す図で、（ａ）図は正面図、（ｂ）図は平面図、（ｃ）図は正面側から見た斜視図、（ｄ）図は（ａ）図は背面側から見た斜視図である。It is a figure which shows the exhaust pipe and exhaust pipe cover with which this embodiment is equipped, (a) figure is a front view, (b) figure is a top view, (c) perspective view seen from the front side, (d) figure (A) The figure is the perspective view seen from the back side. 本実施形態に備えられる排気管及び排気管カバーを示す図で、（ａ）図は背面図、（ｂ）図は（ａ）図のＢ－Ｂ断面図、（ｃ）図は（ａ）図のＣ－Ｃ断面図、（ｄ）図は（ａ）図のＡ－Ａ断面図、（ｅ）図は側面図である。It is a figure which shows the exhaust pipe and exhaust pipe cover with which this embodiment is equipped, (a) figure is a rear view, (b) figure is BB sectional drawing of (a) figure, (c) figure (a) figure The CC cross-sectional view of (d) is a cross-sectional view taken along the line AA of (a), and the (e) view is a side view. 本実施形態に備えられる排気管及び排気管カバーのそれぞれ上方部分を示す拡大斜視図である。It is an expansion perspective view showing the upper part of each of the exhaust pipe and exhaust pipe cover with which this embodiment is equipped. 本実施形態に備えられるカバー保持部を示す図で、（ａ）図はカバー保持部を分解して示した斜視図、（ｂ）図はカバー保持部を排気管に取り付けた状態を示す斜視図である。It is a figure which shows the cover holding | maintenance part with which this embodiment is equipped, (a) Figure is the perspective view which disassembled and showed the cover holding part, (b) The perspective view which shows the state which attached the cover holding part to the exhaust pipe It is. 本実施形態に備えられるカバー保持部を示す図で、（ａ）図はカバー保持部を排気管に取り付けた状態を示す拡大斜視図、（ｂ）図はカバー保持部を排気管に取り付けた状態を示す拡大平面図である。It is a figure which shows the cover holding | maintenance part with which this embodiment is equipped, (a) figure is the expansion perspective view which shows the state which attached the cover holding part to the exhaust pipe, (b) figure which attached the cover holding part to the exhaust pipe It is an enlarged plan view showing. 本実施形態に備えられる排気管及び排気管カバーの取り付け関係を示す分解斜視図である。It is a disassembled perspective view which shows the attachment relation of the exhaust pipe and the exhaust pipe cover with which this embodiment is equipped. 本実施形態に備えられるテールパイプと排気管の配置関係を示す要部断面図である。It is principal part sectional drawing which shows the arrangement | positioning relationship of the tail pipe and exhaust pipe with which this embodiment is equipped.
　以下、本発明に係る作業機械の実施の形態を図に基づいて説明する。 Hereinafter, an embodiment of a working machine according to the present invention will be described based on the drawings.
　図１は本発明に係る作業機械の一実施形態を構成するミニショベルの車体を示す側面図、図２は図１に示すミニショベルに備えられる車体の背面図、図３は図１に示すミニショベルの車体を斜め前方から見た斜視図、図４は図１に示すミニショベルの車体の平面図、図５は図１に示すミニショベルの運転席に座ったオペレータと、後側左支柱及び排気管の位置関係を示す図で、（ａ）図は背面図、（ｂ）図は平面図である。 FIG. 1 is a side view showing a car body of a mini shovel constituting an embodiment of a working machine according to the present invention, FIG. 2 is a rear view of a car body provided in the mini shovel shown in FIG. 4 is a plan view of the body of the mini excavator shown in FIG. 1, and FIG. 5 is an operator sitting on the driver's seat of the mini excavator shown in FIG. It is a figure which shows the positional relationship of an exhaust pipe, (a) figure is a rear view, (b) A figure is a top view.
　図１～４に示すように、本実施形態に係る作業機械は、例えばミニショベルから成っている。本実施形態は、走行体１と、この走行体１上に配置される旋回体２と、この旋回体２の前側に配置された支持部１６に支持される図示しない作業装置とを備えている。作業装置は、ブーム、アーム、バケット等を備え、土砂の掘削作業等を実施することができる。上述した走行体１と旋回体２は車体を構成している。 As shown in FIGS. 1 to 4, the working machine according to the present embodiment comprises, for example, a mini shovel. The present embodiment includes a traveling body 1, a revolving unit 2 disposed on the traveling unit 1, and a not-shown working device supported by a support portion 16 disposed on the front side of the revolving unit 2. . The work device includes a boom, an arm, a bucket, and the like, and can carry out a digging operation and the like of earth and sand. The traveling body 1 and the revolving body 2 described above constitute a vehicle body.
　旋回体２の旋回フレーム２ａ上には、運転席３が配置され、この運転席３を覆うように配置されるキャノピ４を設けてある。キャノピ４は、例えば４柱を有するキャノピから成っている。すなわち、キャノピ４は、前側右支柱５ａと、前側左支柱５ｂと、後側右支柱５ｃと、後側左支柱５ｄとを備えている。また、このキャノピ４は、支柱５ａ～５ｄの上部に配置され、運転席３を覆うルーフ６を備えている。 A driver's seat 3 is disposed on the swing frame 2 a of the swing body 2, and a canopy 4 disposed to cover the driver's seat 3 is provided. The canopy 4 is made of, for example, a canopy having four columns. That is, the canopy 4 includes the front right support 5 a, the front left support 5 b, the rear right support 5 c, and the rear left support 5 d. In addition, the canopy 4 is provided with a roof 6 which is disposed above the columns 5 a to 5 d and covers the driver's seat 3.
　運転席３の後側に位置する旋回体２の部分には、重量バランスを確保するカウンタウェイト７を設けてある。このカウンタウェイト７には、エンジンの排気ガスをカウンタウェイト７の上方位置で放出する排気口１３ａを有する排気管１３を立設させてある。また、排気管１３の周面を囲むように配置され、排気管１３への接触を防ぐ排気管カバー２１を備えている。 At a portion of the swing body 2 located behind the driver's seat 3, a counterweight 7 for securing a weight balance is provided. On the counterweight 7, an exhaust pipe 13 having an exhaust port 13a for discharging the exhaust gas of the engine at a position above the counterweight 7 is provided upright. In addition, an exhaust pipe cover 21 which is disposed so as to surround the circumferential surface of the exhaust pipe 13 and which prevents contact with the exhaust pipe 13 is provided.
　本実施形態は、図４に示すように、運転席３のシップポイントすなわち座席基準点１７と、例えば後側左支柱５ｄとを結ぶ仮想的な直線１８の近傍位置に、排気管１３及び排気管カバー２１を配置してある。これにより、図５に示すように、運転席３にオペレータ２２が着座した際には、排気管１３及び排気管カバー２１がオペレータの背後に位置する状態となる。 In the present embodiment, as shown in FIG. 4, the exhaust pipe 13 and the exhaust pipe are located near the virtual straight line 18 connecting the ship point of the driver's seat 3, ie, the seat reference point 17 and the rear left support 5d. A cover 21 is arranged. As a result, as shown in FIG. 5, when the operator 22 is seated on the driver's seat 3, the exhaust pipe 13 and the exhaust pipe cover 21 are positioned behind the operator.
　図６は本実施形態に備えられる排気管の排気口の高さ位置を説明する図である。 FIG. 6 is a view for explaining the height position of the exhaust port of the exhaust pipe provided in the present embodiment.
　本実施形態に係るミニショベルは、図６に示すように、排気管１３の高さ寸法を、排気口１３ａがキャノピ４のルーフ６の最上部６ａの高さ寸法６ａ１と、最下部６ｂの高さ寸法６ｂ１との間の高さ領域２３に含まれるような高さ寸法に設定してある。すなわち、排気口１３ａの上端がルーフ６の最上部６ａの高さ位置６ａ１よりも上方に位置しないように、また、排気口１３ａの下端がルーフ６の最下部６ｂの高さ位置６ｂ１により下方に位置しないように、排気管１３の高さ寸法を設定してある。さらに、排気管１３の排気口１３ａの向きが例えば後方を向くように、この排気管１３を配置してある。当該ミニショベルが設置される地面から排気管１３の排気口１３ａまでの高さ寸法は、大人の平均身長以上の高さ寸法、例えば１７０ｃｍ以上の高さ寸法に設定してある。 As shown in FIG. 6, the mini shovel according to the present embodiment has the height of the exhaust pipe 13 and the height 6a1 of the top 6a of the roof 6 of the canopy 4 and the height of the bottom 6b. The height dimension is set to be included in the height area 23 between the height dimension 6b1. That is, the lower end of the exhaust port 13a is moved downward by the height position 6b1 of the lowermost portion 6b of the roof 6 so that the upper end of the exhaust port 13a is not positioned higher than the height position 6a1 of the top 6a of the roof 6 The height dimension of the exhaust pipe 13 is set so as not to be positioned. Further, the exhaust pipe 13 is disposed such that the direction of the exhaust port 13a of the exhaust pipe 13 is, for example, directed rearward. The height dimension from the ground where the mini shovel is installed to the exhaust port 13a of the exhaust pipe 13 is set to a height dimension greater than the average height of an adult, for example, a height dimension greater than 170 cm.
　図７は本実施形態に備えられる排気管及び排気管カバーを示す図で、（ａ）図は正面図、（ｂ）図は平面図、（ｃ）図は正面側から見た斜視図、（ｄ）図は背面側から見た斜視図、図８は第１実施形態に備えられる排気管及び排気管カバーを示す図で、（ａ）図は背面図、（ｂ）図は（ａ）図のＢ－Ｂ断面図、（ｃ）図は（ａ）図のＣ－Ｃ断面図、（ｄ）図は（ａ）図のＡ－Ａ断面図、（ｅ）図は側面図である。 7A and 7B are diagrams showing an exhaust pipe and an exhaust pipe cover provided in the present embodiment, where FIG. 7A is a front view, FIG. 7B is a plan view, and FIG. 7C is a perspective view as viewed from the front side d) The figure is a perspective view seen from the back side, FIG. 8 is a view showing an exhaust pipe and an exhaust pipe cover provided in the first embodiment, (a) a rear view, (b) a (a) view The BB cross-sectional view of (c) is a CC cross-sectional view of the (a) view, (d) is an AA cross-sectional view of the (a) view, and (e) is a side view.
　これらの図７，８に示すように、排気管１３の下端には、排気管１３の筒状部に連通する穴部を有し、カウンタウェイト７の上面に固定されるフランジ１９を一体に設けてある。このフランジ１９は、ボルト１５によってカウンタウェイト７の上面に固定される。 As shown in FIGS. 7 and 8, the lower end of the exhaust pipe 13 has a hole communicating with the cylindrical portion of the exhaust pipe 13, and is integrally provided with a flange 19 fixed to the upper surface of the counterweight 7. It is The flange 19 is fixed to the upper surface of the counterweight 7 by a bolt 15.
　本実施形態は、排気管カバー２１の下端部分に、図示しないブラシ等の清掃具の挿入を許容させる開口部３０を形成する切り欠き部を備えている。図１に示すように、開口部３０が、例えば運転席３の側にのみ位置するように排気管カバー２１を配置してある。この排気管カバー２１は、排気管１３との間に隙間１３ａをもって配置してある。 In the present embodiment, the lower end portion of the exhaust pipe cover 21 is provided with a notch portion which forms an opening portion 30 which allows the insertion of a cleaning tool such as a brush (not shown). As shown in FIG. 1, the exhaust pipe cover 21 is disposed such that the opening 30 is located, for example, only on the driver's seat 3 side. The exhaust pipe cover 21 is disposed with a gap 13 a between itself and the exhaust pipe 13.
　同図７，８に示すように、排気管カバー２１は、それぞれ排気管１３の延設方向に沿うように延設され、排気管１３を挟むように互いに隙間２１Ｃをもって対向して配置される第１分割カバー部２１Ａと第２分割カバー部２１Ｂとを含んでいる。また、上述した切り欠き部は、第１分割カバー部２１Ａの下端部分に形成される第１切り欠き部２１Ａ２と、第２分割カバー部２１Ｂの下端部分に形成される第２切り欠き部２１Ｂ２とから成っている。第１分割カバー部２１Ａと第２分割カバー部２１Ｂは、それぞれの下端にカウンタウェイト７の上面に取り付けられる平板状の第１取付け部２１Ａ３、第２取り付け部２１Ｂ３を備えている。これらの取り付け部２１Ａ３，２１Ｂ３は、上述したボルト１５によって排気管１３のフランジ１９と共締めされてカウンタウェイト７に固定されるようになっている。なお、第１分割カバー部２１Ａの側面には、多数のスリット２１Ａ１を形成してある。同様に、第２分割カバー部２１Ｂの側面にも多数のスリットを形成してある。 As shown in FIGS. 7 and 8, the exhaust pipe covers 21 extend along the extending direction of the exhaust pipe 13 and are disposed to face each other with a gap 21 C so as to sandwich the exhaust pipe 13. The first divided cover portion 21A and the second divided cover portion 21B are included. Further, the above-mentioned notches are a first notch 21A2 formed at the lower end of the first divided cover 21A, and a second notch 21B2 formed at the lower end of the second divided cover 21B. It consists of The first divided cover portion 21A and the second divided cover portion 21B each have a flat plate-shaped first mounting portion 21A3 and a second mounting portion 21B3 attached to the upper surface of the counterweight 7 at lower ends thereof. The attachment portions 21A3 and 21B3 are fastened together with the flange 19 of the exhaust pipe 13 by the above-described bolt 15 and fixed to the counterweight 7. A large number of slits 21A1 are formed on the side surface of the first divided cover portion 21A. Similarly, a large number of slits are formed on the side surface of the second divided cover portion 21B.
　図９は本実施形態に備えられる排気管及び排気管カバーのそれぞれ上方部分を示す拡大斜視図、図１０は本実施形態に備えられるカバー保持部を示す図で、（ａ）図はカバー保持部を分解して示した斜視図、（ｂ）図はカバー保持部を排気管に取り付けた状態を示す斜視図，図１１は本実施形態に備えられるカバー保持部を示す図で、（ａ）図はカバー保持部を排気管に取り付けた状態を示す拡大斜視図、（ｂ）図はカバー保持部を排気管に取り付けた状態を示す拡大平面図、図１２は本実施形態に備えられる排気管及び排気管カバーの取り付け関係を示す分解斜視図である。 FIG. 9 is an enlarged perspective view showing an upper portion of an exhaust pipe and an exhaust pipe cover provided in the present embodiment, FIG. 10 is a view showing a cover holding portion provided in the present embodiment, and FIG. (B) is a perspective view showing the cover holding portion attached to the exhaust pipe, and FIG. 11 is a view showing the cover holding portion provided in the present embodiment, (a) view Fig. 12 is an enlarged perspective view showing a state in which the cover holding portion is attached to the exhaust pipe, Fig. 12 (b) is an enlarged plan view showing the state in which the cover holding portion is attached to the exhaust pipe It is a disassembled perspective view which shows the attachment relation of an exhaust pipe cover.
　本実施形態は、図９～１２に示すように、排気管カバー２１を排気管１３に保持させるカバー保持部２４を備えている。このカバー保持部２４は、図１１の（ｂ）図に示すように、排気管１３の周面を囲むように、排気管１３との間に隙間１３ｂをもって配置した環状部材２４ａと、この環状部材２４ａを支持し、排気管１３の周囲に例えば溶接によって固定した後述の支持部材と、環状部材２４ａに例えば溶接によって固定され、上下方向に延設させた後述の立設部材と、この立設部材に排気管カバー２１を取り付ける取り付け手段とを備えている。なお例えば、環状部材２４ａは支持部材に溶接してある。 In the present embodiment, as shown in FIGS. 9 to 12, the cover holding portion 24 for holding the exhaust pipe cover 21 on the exhaust pipe 13 is provided. The cover holding portion 24 is, as shown in FIG. 11B, an annular member 24a disposed with a gap 13b with the exhaust pipe 13 so as to surround the circumferential surface of the exhaust pipe 13, and the annular member 24a is supported, and a support member described later fixed by welding, for example, around the exhaust pipe 13, a standing member fixed to the annular member 24a by welding, for example, extended in the vertical direction, and the standing member And an attachment means for attaching the exhaust pipe cover 21 thereto. For example, the annular member 24a is welded to the support member.
　上述した支持部材は、排気管１３を挟んで互いに対向するように配置した一対の支持部材２４ｂ，２４ｃから成っている。上述した立設部材は、排気管１３を挟んで互いに対向するように配置され、それぞれ排気管カバー２１の第１分割カバー部２１Ａまたは第２分割カバー部２１Ｂが取り付けられ、曲げ加工された一対の立設部材２４ｄ，２４ｅから成っている。 The above-described support members are composed of a pair of support members 24 b and 24 c disposed to face each other with the exhaust pipe 13 interposed therebetween. The erecting members described above are disposed to face each other with the exhaust pipe 13 interposed therebetween, and each of the first divided cover portion 21A or the second divided cover portion 21B of the exhaust pipe cover 21 is attached and bent. It consists of standing members 24d and 24e.
　図１０の（ｂ）図、及び図１２に示すように、一対の支持部材２４ｃ，２４ｄは、例えば排気管１３の上方部分に配置してある。これらの支持部材２４ｃ，２４ｄによって支持される環状部材２４ａに、一対の立設部材２４ｄ，２４ｅの下方部分を例えば溶接により固定してある。 As shown in FIG. 10B and FIG. 12, the pair of support members 24 c and 24 d are disposed, for example, in the upper portion of the exhaust pipe 13. Lower portions of the pair of upright members 24d and 24e are fixed by, for example, welding to an annular member 24a supported by the support members 24c and 24d.
　立設部材２４ｄ，２４ｅのそれぞれの上部には、めねじ部が形成された取り付け部材２４ｆ，２４ｇを固定してあり、図９に示す該当するボルト２５が取り付け部材２４ｆ，２４ｇのめねじ部に螺合して締結されることにより、第１分割カバー部２１Ａ、第２分割カバー部２１Ｂのそれぞれが排気管１３に保持される。上述した取り付け部材２４ｆ，２４ｇ及びボルト２５によって、立設部材２４ｄ，２４ｅに排気管カバー２１に含まれる第１分割カバー部２１Ａ、第２分割カバー部２１Ｂを取り付ける取り付け手段が構成されている。 Attached members 24f and 24g having female threads are fixed to the upper portions of the upright members 24d and 24e, respectively, and corresponding bolts 25 shown in FIG. 9 are attached to the female threads of the attached members 24f and 24g. By screwing and fastening, each of the first divided cover part 21A and the second divided cover part 21B is held by the exhaust pipe 13. The attachment members 24f and 24g and the bolts 25 constitute attachment means for attaching the first divided cover portion 21A and the second divided cover portion 21B included in the exhaust pipe cover 21 to the upright members 24d and 24e.
　図１１の（ｂ）図に示すように、一対の支持部材２４ｂ，２４ｃと、一対の立設部材２４ｄ，２４ｅを、平面視で互いに直交するように配置してある。また、上述した構成のカバー保持部２４を１つ設け、第１分割カバー部２１Ａと第２分割カバー部２１Ｂのそれぞれの上方部分を上述のようにカバー保持部２４に保持させるとともに、第１分割カバー部２１Ａ及び第２分割カバー部２１Ｂのそれぞれの下端部、すなわち第１，第２取り付け部２１Ａ３，２１Ｂ３を上述のようにカウンタウェイト７に固定してある。 As shown in FIG. 11B, the pair of support members 24b and 24c and the pair of upright members 24d and 24e are disposed to be orthogonal to each other in plan view. Further, one cover holding portion 24 having the above-described configuration is provided, and the upper portions of the first divided cover portion 21A and the second divided cover portion 21B are held by the cover holding portion 24 as described above. Lower ends of the cover portion 21A and the second divided cover portion 21B, that is, the first and second attachment portions 21A3 and 21B3 are fixed to the counterweight 7 as described above.
　なお、図１２に示すように、カウンタウェイト７の上面７ｂにはエンジンの排気ガスが導かれる穴７Ｃを形成してあり、この穴７Ｃの周囲にボルト穴７ｂ１を複数形成してある。排気管１３のフランジ１９に形成した穴１９ａと、第１分割カバー部２１Ａの第１取付け部２１Ａ３に形成した穴とを、カウンタウェイト７の上面７ｂのボルト穴７ｂ１に適合させて、また排気管１３のフランジ１９に形成した穴１９ａと、第２分割カバー部２１Ｂの第２取り付け部２１Ｂ３に形成した穴とを、カウンタウェイト７の上面の他のボルト穴７ｂ１に適合させて、ボルト１５によって第１分割カバー部２１Ａ及び第２分割カバー部２１Ｂと、排気管１３とが締結され、これらの第１分割カバー部２１Ａ及び第２分割カバー部２１Ｂと、排気管１３とがカウンタウェイト７上に図１に示すように、キャノピ４に接触しないように自立した状態で固定され、立設保持されるようになっている。 As shown in FIG. 12, the upper surface 7b of the counterweight 7 is formed with a hole 7C to which the exhaust gas of the engine is introduced, and a plurality of bolt holes 7b1 are formed around the hole 7C. The holes 19a formed in the flange 19 of the exhaust pipe 13 and the holes formed in the first mounting portion 21A3 of the first divided cover portion 21A are fitted to the bolt holes 7b1 of the upper surface 7b of the counterweight 7, and the exhaust pipe A hole 19a formed in the flange 19 of 13 and a hole formed in the second attachment portion 21B3 of the second divided cover portion 21B are fitted to the other bolt holes 7b1 on the upper surface of the counterweight 7, and The first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13 are fastened, and the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13 are illustrated on the counterweight 7 as shown in FIG. As shown in 1, it is fixed in a self-supporting state so as not to contact the canopy 4, and is set up and held.
　図１３は本実施形態に備えられるテールパイプと排気管の配置関係を示す要部断面図である。 FIG. 13 is a cross-sectional view of an essential part showing an arrangement relationship between a tail pipe and an exhaust pipe provided in the present embodiment.
　上述した旋回体２の旋回フレーム２ａ上には、図示しないエンジンの排気ガスが導かれて消音するマフラ１０と、このマフラ１０から排出された排気ガスを導くテールパイプ１１とが配置されている。例えばカウンタウェイト７には、上述した図１２に示すこのカウンタウェイト７の穴７ｃに連通する通路７ａを形成してある。テールパイプ１１は、通路７ａ内に、この通路７ａを形成するカウンタウェイト７の壁面と接触しないように挿入され、その上端１１ａが排気管１３の内部に挿入されるように構成してある。 On the swing frame 2a of the swing body 2 described above, a muffler 10 for guiding and muffling exhaust gas of an engine (not shown) and a tail pipe 11 for guiding the exhaust gas discharged from the muffler 10 are disposed. For example, in the counterweight 7, a passage 7a communicating with the hole 7c of the counterweight 7 shown in FIG. 12 described above is formed. The tail pipe 11 is inserted into the passage 7 a so as not to contact the wall surface of the counterweight 7 forming the passage 7 a, and the upper end 11 a is inserted into the exhaust pipe 13.
　このように構成した本実施形態は、エンジンの排気ガスがマフラ１０、テールパイプ１１を介して排気管１３に導かれ、この排気管１３の排気口１３ａからカウンタウェイト７の上方位置で外部に放出される。 In this embodiment configured as described above, the exhaust gas of the engine is led to the exhaust pipe 13 through the muffler 10 and the tail pipe 11, and discharged outside from the exhaust port 13a of the exhaust pipe 13 at a position above the counterweight 7. Be done.
　また、本実施形態によれば、排気管１３の高さ寸法を、排気口１３ａがキャノピ４のルーフ６の最上部６ａと最下部６ｂとの間に配置される高さ寸法に設定した構成にしてある。この構成に伴って、旋回体２の旋回時等には、排気管１３の排気口１３ａから放出した排気ガスがキャノピ６の最上部６ａと最下部６ｂとの間の部分によって遮られるので、運転席３方向への排気ガスの流れ込みを少なくすることができる。上述したような排気ガス処理装置を備えたミニショベルでは、排気管１３の排気口１３ａから放出した排気ガスの温度が高くなるが、上述したように排気ガスの運転席３方向への流れ込みが少なくなることから、この点からも本実施形態は、排気ガス処理装置を備えたミニショベルとしても特に好適である。 Further, according to the present embodiment, the height dimension of the exhaust pipe 13 is set to the height dimension at which the exhaust port 13a is disposed between the uppermost portion 6a and the lowermost portion 6b of the roof 6 of the canopy 4. It is Since the exhaust gas discharged from the exhaust port 13a of the exhaust pipe 13 is intercepted by the portion between the top 6a and the bottom 6b of the canopy 6 at the time of the turning of the turning body 2 and the like with this configuration, It is possible to reduce the inflow of exhaust gas in the three directions of the seat. In the mini-excavator equipped with the exhaust gas treatment device as described above, the temperature of the exhaust gas discharged from the exhaust port 13a of the exhaust pipe 13 becomes high, but as described above, the flow of the exhaust gas in the direction of the driver's seat 3 is small. From this point of view, the present embodiment is also particularly suitable as a mini-excavator equipped with an exhaust gas treatment device.
　また、本実施形態は、キャノピ４のルーフ６から排気管１３を突出させないようにすることができるので、トレーラに当該ミニショベルを乗せて運搬する際などに受ける高さ規制による制約を緩和させることができる。また、本実施形態は、建物内作業を実施するために建物の入口から進入しようとするときに、入口の高さがルーフ６の高さよりも高くなっている限りは、排気管１３が入口の上部に当たることなく建物内に進入することができる。すなわち、本実施形態は、当該ミニショベルの運搬時や建物内作業時における排気管による制約を緩和させることができる。 Further, in the present embodiment, since the exhaust pipe 13 can be made not to protrude from the roof 6 of the canopy 4, relieving the restriction due to the height restriction received when the mini shovel is put on the trailer and transported. Can. Further, in the present embodiment, when entering from the entrance of the building in order to carry out the work in the building, the exhaust pipe 13 is an inlet pipe as long as the height of the entrance is higher than the height of the roof 6. You can enter the building without hitting the top. That is, this embodiment can relieve the restriction by the exhaust pipe at the time of conveyance of the mini shovel, or at the time of work in the building.
　また、本実施形態は、排気口１３ａが後方を向くように排気管１３を配置してあるので、排気ガスの放出方向を運転席３とは逆の方向として、放出した排気ガスが運転席３方向へ流れ込まないようにすることができる。 Further, in the present embodiment, the exhaust pipe 13 is disposed so that the exhaust port 13a is directed rearward, so the emitted exhaust gas is directed to the driver seat 3 with the discharge direction of the exhaust gas being the opposite direction to the driver seat 3. It can be prevented from flowing in the direction.
　また、本実施形態は、当該ミニショベルが設置される地面から排気管１３の排気口１３ａまでの高さ寸法を大人の平均身長以上の高さ寸法に設定したことから、当該ミニショベルの周囲に存在する人に対する排気ガスからの保護を実現させることができる。 Further, in the present embodiment, the height dimension from the ground on which the mini shovel is installed to the exhaust port 13a of the exhaust pipe 13 is set to a height dimension greater than the average height of an adult. It is possible to realize protection from exhaust gases for the people present.
　また、本実施形態は、図１３に示すように、カウンタウェイト７にテールパイプ１１が挿入される通路７ａを設け、テールパイプ１１の上端１１ａを排気管１３に挿入させるようにしてあることから、マフラ１０からテールパイプ１１に導かれた排気ガスをカウンタウェイト７の通路７ａを形成する壁面に放射させることがなく、また、テールパイプ１１とカウンタウェイト７の通路を形成する壁面との間に隙間が設けられている。これらのことから、カウンタウェイト７が直接に加熱されることがなく、排気ガスによるカウンタウェイト７の昇温が低くなるように抑えることができる。したがって、排気管１３から排気ガスを放出させる間、カウンタウェイト７への接触による不快感を生じさせないようにすることができる。 Further, in the present embodiment, as shown in FIG. 13, the counterweight 7 is provided with a passage 7a into which the tail pipe 11 is inserted, and the upper end 11a of the tail pipe 11 is inserted into the exhaust pipe 13. Exhaust gas led from the muffler 10 to the tail pipe 11 is not radiated to the wall surface forming the passage 7 a of the counterweight 7, and a gap between the tail pipe 11 and the wall surface forming the passage of the counterweight 7 Is provided. From these things, the counterweight 7 is not directly heated, and the temperature rise of the counterweight 7 due to the exhaust gas can be suppressed to be low. Therefore, while the exhaust gas is released from the exhaust pipe 13, it is possible to prevent the discomfort due to the contact with the counterweight 7.
　また、本実施形態は、図４，５に示すように、運転席３に座ったオペレータ２２が後方を目で確認しようとするとき、運転席３の座席基準点１７と、運転席３の後側に立設する後側左支柱５ｄとを結ぶ仮想的な直線１８上に位置する当該後側左支柱５ｄの背後に排気管１３が完全に、あるいは略完全に隠れた状態になる。したがって、運転席３に座ったオペレータ２２は後側左支柱５ｄによって視界を遮られるものの、排気管１３によって視界を遮られることは少なくなり、当該ミニショベルで実施される作業の作業性を向上させることができる。また、本実施形態は、良好な後方視界を確保できることから、当該ミニショベルの後方に存在する構造物や人に対する安全性を確保することができる。 In the present embodiment, as shown in FIGS. 4 and 5, when the operator 22 sitting in the driver's seat 3 tries to visually check the rear, the seat reference point 17 of the driver's seat 3 and the back of the driver's seat 3 The exhaust pipe 13 is completely or almost completely hidden behind the rear left support 5 d located on a virtual straight line 18 connecting the rear left support 5 d standing on the side. Therefore, although the operator 22 who sits in the driver's seat 3 is blocked by the rear left support 5d, it is less likely to be blocked by the exhaust pipe 13, thereby improving the workability of the work performed by the mini shovel be able to. In addition, since the present embodiment can secure a good rear view, it is possible to secure the safety for a structure or a person present behind the mini shovel.
　また、本実施形態によれば、排気ガスが導かれることによって排気管１３が熱くなるが、この排気管１３の表面からの輻射熱が運転席３の背後に立設された後側左支柱５ｄによって遮られる。これにより、運転席３に着座したオペレータ２２に対して、排気ガスの熱による不快な暖かさを与えないようにすることができる。したがって、排気ガスの温度が高温となりやすい上述した排気ガス処理装置を備えた作業機械にあっては、排気管１３の表面温度も高くなりやすい。このように排気管１３の表面温度が高くなり、上述した輻射熱が高くなるミニショベルとしても本実施形態は好適である。 Further, according to the present embodiment, the exhaust pipe 13 is heated by the exhaust gas being introduced, but the radiation heat from the surface of the exhaust pipe 13 is erected behind the driver's seat 3 by the rear left support 5d. It is blocked. As a result, it is possible to prevent the operator 22 seated in the driver's seat 3 from having an unpleasant warmth due to the heat of the exhaust gas. Therefore, in the case of a working machine provided with the above-described exhaust gas processing device in which the temperature of the exhaust gas tends to be high, the surface temperature of the exhaust pipe 13 also tends to be high. As described above, the present embodiment is also suitable as a mini-excavator in which the surface temperature of the exhaust pipe 13 increases and the above-described radiation heat increases.
　また、本実施形態によれば、排気管カバー２１に含まれる第１，第２分割カバー部２１Ａ，２１Ｂの下端部分に、ブラシ等の清掃具の挿入を許容させる開口部３０を形成する第１，第２切り欠き部２１Ａ２，２１Ｂ２を形成したことから、排気管１３と第１，第２分割カバー部２１Ａ，２１Ｂの隙間１３ｂから枯葉等のゴミが侵入し、排気管１３及び第１，第２分割カバー部２１Ａ，２１Ｂの下端部付近に溜まった場合には、第１，第２分割カバー部２１Ａ，２１Ｂを分解することなく、第１，第２分割カバー部２１Ａ，２１Ｂの下端部分に形成した第１，第２切り欠き部２１Ａ２，２１Ｂ２によって形成される開口部３０にブラシ等の清掃具を挿入して、そのゴミを簡単に清掃除去することができる。これにより、第１，第２分割カバー部２１Ａ，２１Ｂの下端部分に溜まったゴミの清掃作業を能率良く行うことができる。したがって、本実施形態は、上述したように排気ガス処理装置を備え排気ガスの温度が高くなりやすく、枯葉等のゴミの排気管１３への接触を防ぐことが特に要望されるミニショベルとしても好適である。さらに、この第１実施形態は、町中等のように枯葉等のゴミが生じやすい作業環境で活用されることの多いミニショベルに好適である。 Further, according to the present embodiment, the opening 30 for permitting the insertion of the cleaning tool such as the brush is formed at the lower end portion of the first and second divided cover portions 21A and 21B included in the exhaust pipe cover 21. Since the second notches 21A2 and 21B2 are formed, dust such as dead leaves intrudes from the gap 13b between the exhaust pipe 13 and the first and second divided cover parts 21A and 21B. If the first and second divided cover portions 21A and 21B are not disassembled, the lower end portions of the first and second divided cover portions 21A and 21B are collected when they are accumulated near the lower end portions of the two divided cover portions 21A and 21B. By inserting a cleaning tool such as a brush into the opening 30 formed by the formed first and second notches 21A2 and 21B2, the dust can be easily removed by cleaning. As a result, it is possible to efficiently perform the cleaning operation of the dust collected on the lower end portions of the first and second divided cover portions 21A and 21B. Therefore, as described above, the present embodiment is also suitable as a mini-excavator that is equipped with the exhaust gas treatment device and the temperature of the exhaust gas tends to be high, and it is particularly desirable to prevent dust such as dead leaves from contacting the exhaust pipe 13 It is. Furthermore, this first embodiment is suitable for a mini-excavator often used in a work environment where waste such as dead leaves is likely to be produced, such as in a town.
　また、本実施形態によれば、第１，第２分割カバー部２１Ａ，２１Ｂの第１，第２切り欠き部２１Ａ２，２１Ｂ２によって形成される開口部３０が運転席３の側のみに位置するように、第１，第２分割カバー部２１Ａ，２１Ｂを配置してあることから、開口部３０が運転席３の側に隠れた状態となり、これにより熱せられた排気管１３への接触を防ぐことができる。また、本実施形態は、排気管１３及び第１，第２分割カバー部２１Ａ，２１Ｂの近傍であって運転席３側に形成され、開口部３０に連通する隙間部分、すなわち運転席３と第１，第２分割カバー部２１Ａ，２１Ｂとの間に形成される隙間部分にゴミが侵入した場合でも、その隙間部分のゴミを開口部３０に溜まっているゴミと一緒に、ブラシ等の清掃具によって清掃除去することができる。 Further, according to the present embodiment, the opening 30 formed by the first and second notches 21A2 and 21B2 of the first and second divided cover parts 21A and 21B is positioned only on the driver's seat 3 side. Because the first and second divided cover portions 21A and 21B are disposed, the opening 30 is hidden behind the driver's seat 3, thereby preventing contact with the heated exhaust pipe 13. Can. Further, in the present embodiment, a gap portion which is formed in the vicinity of the exhaust pipe 13 and the first and second divided cover portions 21A and 21B and on the driver's seat 3 side and communicates with the opening 30, ie, the driver's seat 3 and the Even when dust intrudes into the clearance formed between the first and second divided cover portions 21A and 21B, the cleaning tool such as a brush along with the dust accumulated in the clearance 30 in the clearance 30 Can be cleaned and removed.
　また、本実施形態によれば、第１分割カバー部２１Ａと第２分割カバー部２１Ｂとの間に形成された隙間２１Ｃから、排気ガスによる排気管１３の熱を放散させることができるので、排気管１３と第１，第２分割カバー部２１Ａ，２１Ｂとの間に排気管１３の熱がこもって、第１，第２分割カバー部２１Ａ，２１Ｂが加熱することを防止できる。なお、第１，第２分割カバー部２１Ａ，２１Ｂの隙間２１Ｃから侵入し、排気管１３及び第１，第２分割カバー部２１Ａ，２１Ｂの下端部付近に溜まった枯葉等のゴミも、開口部３０にブラシ等の清掃具を挿入することにより簡単に清掃除去することができる。 Further, according to the present embodiment, the heat of the exhaust pipe 13 due to the exhaust gas can be dissipated from the gap 21C formed between the first divided cover portion 21A and the second divided cover portion 21B. The heat of the exhaust pipe 13 between the pipe 13 and the first and second divided cover portions 21A and 21B can prevent the first and second divided cover portions 21A and 21B from being heated. In addition, dust such as dead leaves which enter from the gap 21C of the first and second divided cover portions 21A and 21B and accumulated near the lower end portions of the exhaust pipe 13 and the first and second divided cover portions 21A and 21B is also an opening portion. It can be easily cleaned and removed by inserting a cleaning tool such as a brush at 30.
　また、カウンタウェイト７の上面７ｂに第１，第２取り付け部２１Ａ３，２１Ｂ３を取り付けることにより、第１分割カバー部２１Ａと第２分割カバー部２１Ｂとを含む排気管カバー２１を安定して立設保持させることができる。 Further, by attaching the first and second attachment portions 21A3 and 21B3 to the upper surface 7b of the counterweight 7, the exhaust pipe cover 21 including the first divided cover portion 21A and the second divided cover portion 21B can be stably erected. It can be held.
　また、本実施形態にあっては、排気管１３の周面に固定した支持部材２４ｂ，２４ｃと、これらの支持部材２４ｂ，２４ｃによって支持される環状部材２４ａと、この環状部材２４ａに固定した立設部材２４ｄ，２４ｅと、これらの立設部材２４ｄ，２４ｅに第１，第２分割カバー部２１Ａ，２１Ｂを取り付ける取り付け部材２４ｆ，２４ｇ及びボルト２５とによって、第１，第２分割カバー部２１Ａ，２１Ｂを安定に保持させることができる。 Further, in the present embodiment, the support members 24b and 24c fixed to the circumferential surface of the exhaust pipe 13, the annular member 24a supported by the support members 24b and 24c, and the upright members fixed to the annular member 24a. The first and second divided cover portions 21A, 21A, and 24b and the bolts 25 attach the first and second divided cover portions 21A and 21B to the erected members 24d and 24e, respectively. 21B can be stably held.
　本実施形態にあっては、排気ガスに熱せられた排気管１３の熱は、排気管１３の周面に固定した支持部材２４ｂ，２４ｃに伝えられ、これらの支持部材２４ｂ，２４ｃから排気管１３との間に隙間１３ｂをもって配置した環状部材２４ａに伝えられ、さらにこの環状部材２４ａから当該環状部材２４ａに固定され、上下方向に延設させた立設部材２４ｄ，２４ｅに取り付けられる第１，第２分割カバー部２１Ａ，２１Ｂに伝えられる。したがって、排気管１３から支持部材２４ｂ，２４ｃに伝えられた熱は主に、支持部材２４ｂ，２４ｃと立設部材２４ｄ，２４ｅとの間に位置する環状部材２４ａの部分で冷やされた後、環状部材２４ａに取り付けられた立設部材２４ｄ，２４ｅの部分と、第１，第２分割カバー部２１Ａ，２１Ｂが取り付けられる取り付け部材２４ｆ，２４ｇ及びボルトが設けられる立設部材２４ｄ，２４ｅの部分との間で冷やされて、立設部材２４ｄ，２４ｅから取り付け部材２４ｆ，２４ｇ及びボルト２５を介して、第１，第２分割カバー部２１Ａ，２１Ｂへと伝えられる。 In the present embodiment, the heat of the exhaust pipe 13 heated by the exhaust gas is transmitted to the support members 24 b and 24 c fixed to the circumferential surface of the exhaust pipe 13, and the exhaust pipe 13 is transmitted from these support members 24 b and 24 c. And an annular member 24a disposed with a gap 13b between the two, and further fixed to the annular member 24a from the annular member 24a and attached to erecting members 24d and 24e extended in the vertical direction. The two split cover portions 21A and 21B are transmitted. Therefore, the heat transferred from the exhaust pipe 13 to the support members 24b and 24c is mainly cooled after being cooled at the portion of the annular member 24a located between the support members 24b and 24c and the standing members 24d and 24e. A portion of erected members 24d and 24e attached to the member 24a, and a portion of the attached members 24f and 24g to which the first and second divided cover portions 21A and 21B are attached and portions of the erected members 24d and 24e provided with bolts It is cooled between the standing members 24d and 24e and is transmitted to the first and second divided cover portions 21A and 21B through the mounting members 24f and 24g and the bolt 25.
　これらにより、本実施形態によれば、排気管１３から第１，第２分割カバー部２１Ａ，２１Ｂへ伝えられる熱を排気管１３を囲むように配置される断熱材や、長尺体を形成する筒状部材を要することなく下げることができる。したがって、本実施形態に備えられる第１，第２分割カバー部２１Ａ，２１Ｂに接触した際の安全性が確保される。また、この第１実施形態は、断熱材や、長尺体を形成する筒状部材を要さずに、排気管１３との間に隙間１３ｂをもって配置される環状部材２４ａを介して第１，第２分割カバー部２１Ａ，２１Ｂを排気管１３に保持させることができる。これにより、本実施形態は、構造の簡単な排気管カバー保持構造を実現させることができ、製作費を低減させることができる。 Thus, according to the present embodiment, a heat insulating material or a long body is formed so as to surround the exhaust pipe 13 with the heat transmitted from the exhaust pipe 13 to the first and second divided cover portions 21A and 21B. It can be lowered without requiring a tubular member. Therefore, the safety at the time of contacting the first and second divided cover portions 21A and 21B provided in the present embodiment is secured. In addition, in the first embodiment, the first and the second members are disposed via the annular member 24a disposed with a gap 13b between the exhaust pipe 13 and the first and the second embodiments without using the heat insulating material and the cylindrical member forming the long body. The exhaust pipe 13 can hold the second divided cover portions 21A and 21B. Thus, this embodiment can realize a simple exhaust pipe cover holding structure, and can reduce the manufacturing cost.
　また、本実施形態は、排気管カバー２１に含まれる第１分割カバー部２１Ａを、排気管１３に固定した一対の支持部材２４ｂ，２４ｃと、これらの支持部材２４ｂ，２４ｃによって支持される環状部材２４ａと、この環状部材２４ａに固定した一対の立設部材２４ｄ，２４ｅのうちの立設部材２４ｄを介して排気管１３に取り付けることができる。また、第２分割カバー部２１Ｂを、排気管１３に固定した一対の支持部材２４ｂ，２４ｃと、これらの支持部材２４ｂ，２４ｃによって支持される環状部材２４ａと、この環状部材２４ａに固定した立設部材２４ｅを介して排気管１３に取り付けることができる。また、一対の立設部材２４ｄ，２４ｃのそれぞれは、曲げ加工されているので比較的大きな強度を確保することができる。これらにより、排気管カバー２１に含まれる第１カバー部２１Ａと第２カバー部２１Ｂとを排気管１３に安定して立設保持させることができる。 Further, in the present embodiment, the first divided cover portion 21A included in the exhaust pipe cover 21 is fixed to the exhaust pipe 13 by a pair of support members 24b and 24c, and an annular member supported by the support members 24b and 24c. It can be attached to the exhaust pipe 13 via the upright member 24d of the pair of upright members 24d and 24e fixed to the annular member 24a. Further, a pair of support members 24b and 24c fixing the second divided cover portion 21B to the exhaust pipe 13, an annular member 24a supported by the support members 24b and 24c, and a standing installation provided to the annular member 24a It can be attached to the exhaust pipe 13 via the member 24e. In addition, since each of the pair of erected members 24d and 24c is bent, it is possible to ensure relatively high strength. As a result, the first cover portion 21A and the second cover portion 21B included in the exhaust pipe cover 21 can be stably erected and held on the exhaust pipe 13.
　また、本実施形態は、対向する第１分割カバー部２１Ａと第２分割カバー部２１Ｂとの間に互いに隙間２１Ｃを形成したことから、また、第１，第２分割カバー部２１Ａ，２１Ｂの側面にスリット２１Ａ１等を形成したことから、排気管１３の熱が第１分割カバー部２１Ａ及び第２分割カバー部２１Ｂと、排気管１３との間にこもらず、排気管１３の熱を上述の隙間２１Ｃ及びスリット２１Ａ等から外部に放散させることができる。したがって、このようなこもり熱による第１，第２分割カバー部２１Ａ，２１Ｂの加熱を抑えることができる。 Further, in the present embodiment, since the gap 21C is formed between the opposing first divided cover portion 21A and the second divided cover portion 21B, the side surfaces of the first and second divided cover portions 21A and 21B are also formed. Since the slits 21A1 and the like are formed in the above, the heat of the exhaust pipe 13 does not stay between the first divided cover portion 21A and the second divided cover portion 21B and the exhaust pipe 13, and the heat of the exhaust pipe 13 It can be dissipated to the outside from 21 C and the slit 21 A or the like. Accordingly, the heating of the first and second divided cover portions 21A and 21B due to such stagnant heat can be suppressed.
　また、本実施形態は、一対の支持部材２４ｂ，２４ｃを排気管１３の上方部分に固定し、これらの支持部材２４ｂ，２４ｃによって支持される環状部材２４ａに一対の立設部材２４ｄ，２４ｅの下方部分を固定した構成にしてある。この構成により、カバー保持部２４における排気管カバー２１の取り付け位置を、排気管１３の上部の高い位置とすることができる。ここで排気管１３の下方部分は、マフラ１０から排出される排気ガスの導入部付近に位置し、排気ガスの高い温度によりその下方部分の温度が高くなる。これに対して、排気管１３の上方部分は、排気ガスの上昇に伴う温度低下により、この排気管１３の上方部分の温度が下方部分に比べて低くなる。このように温度が低下した排気管１３の上方部分の熱が支持部材２４ｂ，２４ｃ、環状部材２４ａ、立設部材２４ｄ，２４ｅを介して排気管カバー２１に含まれる第１，第２分割カバー部２１Ａ，２１Ｂに伝えられるので、カバー保持部２４によって排気管１３に取り付けられたこれらの第１，第２分割カバー部２１Ａ，２１Ｂの温度を比較的低く抑えることができる。 Further, in the present embodiment, the pair of support members 24b and 24c are fixed to the upper portion of the exhaust pipe 13, and the annular members 24a supported by the support members 24b and 24c are located below the pair of upright members 24d and 24e. It has a fixed configuration. With this configuration, the mounting position of the exhaust pipe cover 21 in the cover holding portion 24 can be set to a high position at the top of the exhaust pipe 13. Here, the lower part of the exhaust pipe 13 is located in the vicinity of the introduction part of the exhaust gas discharged from the muffler 10, and the temperature of the lower part becomes high due to the high temperature of the exhaust gas. On the other hand, in the upper portion of the exhaust pipe 13, the temperature of the upper portion of the exhaust pipe 13 is lower than that in the lower portion due to the temperature decrease accompanying the rise of the exhaust gas. The heat of the upper part of the exhaust pipe 13 whose temperature has dropped in this way is contained in the exhaust pipe cover 21 through the support members 24b and 24c, the annular member 24a, and the standing members 24d and 24e. As it is transmitted to 21A and 21B, the temperature of the first and second divided cover portions 21A and 21B attached to the exhaust pipe 13 by the cover holding portion 24 can be suppressed to a relatively low level.
　また、本実施形態は、一対の支持部材２４ｂ，２４ｃと一対の立設部材２４ｄ，２４ｅを、平面視で互いに直交するように配置してある。平面視で一対の支持部材２４ｄ，２４ｅの中央を通り、これらの支持部材２４ｄ，２４ｅを左右に等分に分割する仮想的な中心線を考えた場合、第１分割カバー部２１Ａ側と第２分割カバー部２１Ｂ側にそれぞれ位置する環状部材２４ａの部分、及び一対の立設部材２４ｄ，２４ｅのそれぞれが、上述の中心線に対して対称に配置されるので、左右の安定した重量バランスを確保でき、これによって第１，第２分割カバー部２１Ａ，２１Ｂの排気管１３に対する安定保持を実現させることができる。また、支持部材２４ｂ，２４ｃから環状部材２４ａ、立設部材２４ｄ，２４ｅを介して第１分割カバー部２１Ａ、あるいは第２分割カバー部２１Ｂに伝えられる伝熱経路を比較的長い経路とすることができ、これによって第１，第２分割カバー部２１Ａ，２１Ｂの温度を下げることに貢献する。 Further, in the present embodiment, the pair of support members 24b and 24c and the pair of upright members 24d and 24e are arranged to be orthogonal to each other in plan view. In the case of a virtual center line passing through the centers of the pair of support members 24 d and 24 e in plan view and dividing the support members 24 d and 24 e equally into left and right, the first divided cover portion 21 A side and the second Since the portions of the annular member 24a positioned on the divided cover portion 21B side and the pair of standing members 24d and 24e are arranged symmetrically with respect to the above-mentioned center line, a stable weight balance on the left and right is ensured. Thus, stable holding of the exhaust pipe 13 of the first and second divided cover portions 21A and 21B can be realized. Further, the heat transfer path transmitted from the support members 24b and 24c to the first divided cover portion 21A or the second divided cover portion 21B via the annular member 24a and the standing members 24d and 24e may be a relatively long path. This contributes to lowering the temperature of the first and second divided cover portions 21A and 21B.
　また、本実施形態によれば、第１，第２分割カバー部２１Ａ，２１Ｂのそれぞれの上方部分がカバー保持部２４によって保持され、下方部分がカウンタウェイト７に固定されるので、これらの第１，第２分割カバー部２１Ａ，２１Ｂを、上述のように周囲の部材に接触しない自立した状態で安定に立設保持させることができる。したがって、第１，第２分割カバー部２１Ａ，２１Ｂをこの第１，第２分割カバー部２１Ａ，２１Ｂを取り巻く空気によって冷やすことができるとともに、第１，第２分割カバー部２１Ａ，２１Ｂの熱が周囲の部材に伝えられることが防止される。また、部材数が多くなりがちなカバー保持部２４を１つだけ備えたことから、製作費の節減に貢献する。 Further, according to the present embodiment, the upper portions of the first and second divided cover portions 21A and 21B are held by the cover holding portion 24 and the lower portions are fixed to the counterweight 7, respectively. The second divided cover portions 21A and 21B can be stably erected and held in a self-supporting state not contacting the surrounding members as described above. Therefore, the first and second divided cover portions 21A and 21B can be cooled by the air surrounding the first and second divided cover portions 21A and 21B, and the heat of the first and second divided cover portions 21A and 21B is Transmission to the surrounding members is prevented. Further, the provision of only one cover holding portion 24 which tends to increase the number of members contributes to the reduction of the manufacturing cost.
　なお、上記実施形態は、運転席３の座席基準点１７とキャノピ４の後側左支柱５ｄとを結ぶ仮想的な直線１８の近傍位置に排気管１３及び排気管カバー２１を配置したが、直線１８上に排気管１３及び排気管カバー２１を配置した構成にしてもよい。 In the above embodiment, the exhaust pipe 13 and the exhaust pipe cover 21 are disposed in the vicinity of the virtual straight line 18 connecting the seat reference point 17 of the driver's seat 3 and the rear left support 5 d of the canopy 4 The exhaust pipe 13 and the exhaust pipe cover 21 may be disposed on the surface 18.
　また、上記実施形態は、運転席３の座席基準点１７とキャノピ４の後側左支柱５ｄとを結ぶ仮想的な直線１８の近傍位置に排気管１３及び排気管カバー２１を配置したが、運転席３の座席基準点１７とキャノピ４の後側右支柱５ｃとを結ぶ仮想的な直線上に、またはその仮想的な直線の近傍位置に、排気管１３及び排気管カバー２１を配置した構成にしてもよい。このように構成したものも、運転席３に着座したオペレータ等の良好な後方視界を確保することができる。 Moreover, although the said embodiment arrange | positions the exhaust pipe 13 and the exhaust pipe cover 21 in the vicinity position of the virtual straight line 18 which ties the seat reference point 17 of the driver's seat 3 and the rear left support 5d of the canopy 4, The exhaust pipe 13 and the exhaust pipe cover 21 are disposed on a virtual straight line connecting the seat reference point 17 of the seat 3 and the rear right support 5 c of the canopy 4 or at a position near the virtual straight line. May be Such a configuration can also ensure a good rearward visibility of an operator or the like seated in the driver's seat 3.
　また、上記実施形態は、排気口１３ａが運転室３の後方を向くように排気管１３を配置してあるが、排気口１３ａが側方を向くように排気管１３を配置してもよい。 Moreover, although the exhaust pipe 13 is arrange | positioned so that the exhaust port 13a may face the back of the operator's cab 3 in the said embodiment, you may arrange | position the exhaust pipe 13 so that the exhaust port 13a may face sideways.
　また、上記実施形態は、排気管カバー２１を排気管１３に保持させるカバー保持部２４を、排気管１３の上方部分に１つだけ設けたが、排気管カバー２１の下端部分をカウンタウェイト７に固定せず、排気管１３の上方部分と、下方部分の双方に設けたカバー保持部２４によって排気管カバー２１を排気管１３に保持させるように構成してもよい。 In the above embodiment, only one cover holding portion 24 for holding the exhaust pipe cover 21 on the exhaust pipe 13 is provided on the upper part of the exhaust pipe 13. However, the lower end part of the exhaust pipe cover 21 is used as the counterweight 7 The exhaust pipe cover 21 may be configured to be held on the exhaust pipe 13 by the cover holding portions 24 provided on both the upper portion and the lower portion of the exhaust pipe 13 without being fixed.
　また、上記実施形態に係る作業機械はミニショベルから成っているが、本発明は、ミニショベルには限られない。本発明は、ミニショベルよりも大きな型式となる油圧ショベル等の作業機械にも適用可能である。 Moreover, although the working machine which concerns on the said embodiment consists of mini shovels, this invention is not limited to mini shovels. The present invention is also applicable to working machines such as hydraulic excavators which are larger than mini excavators.
　１　　走行体（車体）
　２　　旋回体（車体）
　３　　運転席
　４　　キャノピ
　６　　ルーフ
　６ａ　最上部
　６ａ１　高さ位置
　６ｂ　最下部
　６ｂ１　高さ位置
　７　　カウンタウェイト
　７ｂ　上面
　１０　　マフラ
　１１　　テールパイプ
　１３　　排気管
　１３ａ　排気口
　１６　　支持部
　２１　　排気管カバー
　２１Ａ　第１分割カバー部
　２１Ｂ　第２分割カバー部
　２２　　オペレータ 1 Running body (vehicle body)
2 Rotating body (vehicle body)
Reference Signs List 3 driver's seat 4 canopy 6 roof 6a top 6a1 height 6b bottom 6b1 height 7 counterweight 7b top 10 muffler 11 tail pipe 13 exhaust pipe 13a exhaust port 16 support 21 exhaust pipe cover 21A first division cover section 21B 2nd division cover part 22 operator

Claims (5)

  1. 　旋回体と、この旋回体に取り付けられる作業装置と、旋回体上に配置した運転席と、旋回体上に設けられ、上記運転席の上方を覆うルーフを有するキャノピと、上記旋回体上に配置され、エンジンの排気ガスが導かれるマフラと、このマフラから排出される排気ガスを上記カウンタウェイトの上方位置で放出させる排気口を有する排気管とを備えた作業機械において、
    　上記排気管の高さ寸法を、上記排気口が上記キャノピの上記ルーフの最上部と最下部との間に配置される高さ寸法に設定したことを特徴とする作業機械。     A revolving unit, a working device attached to the revolving unit, a driver's seat disposed on the revolving unit, a canopy having a roof provided on the revolving unit and covering the driver's seat and disposed on the revolving unit A work machine comprising: a muffler to which exhaust gas of the engine is introduced; and an exhaust pipe having an exhaust port for discharging the exhaust gas discharged from the muffler at a position above the counterweight,
    A working machine, wherein the height dimension of the exhaust pipe is set to a height dimension at which the exhaust port is disposed between the top and the bottom of the roof of the canopy.
  2. 　請求項１に記載の作業機械において、
    　上記排気口の向きが後方または側方となるように上記排気管を配置したことを特徴とする作業機械。     In the work machine according to claim 1,
    A working machine in which the exhaust pipe is disposed such that the direction of the exhaust port is backward or sideward.
  3. 　請求項２に記載の作業機械において、
    　当該作業機械が設置される地面から上記排気管の上記排気口までの高さ寸法を大人の平均身長以上の高さ寸法に設定したことを特徴とする作業機械。     In the working machine according to claim 2,
    A working machine characterized in that the height dimension from the ground on which the working machine is installed to the exhaust port of the exhaust pipe is set to a height dimension equal to or larger than an average height of an adult.
  4. 　請求項３に記載の作業機械において、
    　上記排気管を上記カウンタウェイトの上面に固定するフランジを備えたことを特徴とする作業機械。     In the work machine according to claim 3,
    A working machine comprising a flange for fixing the exhaust pipe to the upper surface of the counterweight.
  5. 　請求項１～４のいずれか１項に記載の作業機械において、
    　上記排気管への接触を防ぐ排気管カバーを備えたことを特徴とする作業機械。     In the working machine according to any one of claims 1 to 4,
    A working machine comprising an exhaust pipe cover that prevents contact with the exhaust pipe.
PCT/JP2012/075659 2012-03-27 2012-10-03 Work machine WO2013145385A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012071940A JP5759408B2 (en) 2012-03-27 2012-03-27 Mini excavator
JP2012-071940 2012-03-27

Publications (1)

Publication Number Publication Date
WO2013145385A1 true WO2013145385A1 (en) 2013-10-03

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JP (1) JP5759408B2 (en)
WO (1) WO2013145385A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007062506A (en) * 2005-08-30 2007-03-15 Hitachi Constr Mach Co Ltd Construction machine
JP2012057414A (en) * 2010-09-10 2012-03-22 Hitachi Constr Mach Co Ltd Work machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007062506A (en) * 2005-08-30 2007-03-15 Hitachi Constr Mach Co Ltd Construction machine
JP2012057414A (en) * 2010-09-10 2012-03-22 Hitachi Constr Mach Co Ltd Work machine

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JP5759408B2 (en) 2015-08-05

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