JP2016061055A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure appropriate wiring of electrical wiring for electrical equipment installed around a machine room.SOLUTION: Electric equipment 7 is installed around a machine room 6. A machine room cover 60 has a bonnet 20 above an upper cover 63 on which an opening 66 is formed for opening up inside the machine room 6. The bonnet 20 includes a frame-like peripheral wall part 22 installed above an opening edge part 67 extending around the opening 66, and an upper wall part 23 covering above the opening 66. A wiring duct 40 is installed between the peripheral wall part 22 and the opening edge part 67, the wiring duct being partitioned from the machine room 6. Electrical wires IC, OC, CC connected to the electrical equipment 7 are wired through the wiring duct 40.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a working machine such as a hydraulic excavator, and in particular, to a wiring technique for electric wiring around a machine room.

  In a work machine, an electric device may be installed around a machine room in which a drive device such as an engine or a hydraulic pump is accommodated.

  For example, in the working machine (lifting machine) of Patent Document 1, a lifting magnet control box is externally attached above the left end of the engine room (machine room). In the construction machine of Patent Document 2, a machine room building is provided. A camera unit for rear monitoring is attached to the upper part of the counterweight adjacent to the rear side of the (machine room).

JP 2010-95845 A JP 2006-336361 A

  The electrical equipment needs to connect electrical wiring to the cab or the like. However, when the electrical equipment is installed around the machine room, the wiring of the electrical wiring is not easy.

  For example, in the construction machine of Patent Document 2, electric wiring is passed through the inside of the machine room, but the inside of the machine room is substantially sealed with a machine room cover in order to ensure quietness and heat insulation, Various devices are densely arranged.

  For this reason, when passing electrical wiring inside the machine room, it is necessary to make a hole in the wall to close the gap and pass the electrical wiring, or to bypass the device and route the electrical wiring. It tends to be a routing structure.

  Moreover, the interior of the machine room becomes hot due to the operation of the drive device. Therefore, electrical wiring excellent in heat resistance is required, and the member cost is high.

  Even if the electrical wiring is routed outside the machine room, there is a risk that the electrical wiring will hit an obstacle during the work, and depending on the way of wiring, the electrical wiring may interfere with the visual field during the work or look bad. There is also a fear.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a work machine that can properly route electrical wiring of electrical equipment installed around a machine room.

  In the present invention, the electrical wiring can be properly routed by using the bonnet installed on the machine room cover.

  That is, the work machine of the present invention accommodates a work device that performs a work operation, a drive device that drives the work device, and is installed around a machine room that is partitioned inside and outside by a machine room cover. Electrical equipment. The machine room cover includes an upper cover in which an opening that opens the inside of the machine room is formed, and a bonnet that is installed so as to bulge above the upper cover and that can open and close the opening. Have.

  The bonnet includes a frame-shaped peripheral wall portion disposed on an opening edge that extends around the opening portion, and an upper wall portion that is connected to the upper end portion of the peripheral wall portion and covers the upper portion of the opening portion. doing. A wiring duct that is partitioned from the machine room and extends in the circumferential direction is provided between the peripheral wall portion and the opening edge portion.

  And the electrical wiring connected with the said electric equipment is routed via the said routing duct.

  According to this work machine, the electrical wiring connected to the electrical equipment installed in the periphery of the machine room is routed through the routing duct extending along the lower side of the hood installed on the machine room. As a result, it can be easily and efficiently routed without passing through the inside of the machine room.

  Electrical wiring can be protected by the wiring duct, preventing obstacles from colliding with the electrical wiring, and the wiring duct is provided under the bonnet edge so that the electrical wiring is not visible during work. There is no risk of obstructing or deteriorating appearance.

  Therefore, according to this work machine, it is possible to appropriately route the electrical wiring of the electrical equipment installed around the machine room.

  Furthermore, a cutout portion that is recessed from the lower end portion toward the upper end portion is formed in at least a part of the peripheral wall portion so as to extend in the circumferential direction, and the routing duct projects upward from the opening edge portion. The routing having an inner side surface extending along the notch and an upper surface projecting outward from an upper end of the inner side surface so as to face the opening edge, and facing the inner side surface The outside of the duct may be opened.

  Then, you can install the routing duct without changing the height of the hood. The heat dissipation of the electrical wiring routed inside the wiring duct can be enhanced. As a result, the visual field is not obstructed, the heat resistance required for the electric wiring is lowered, an inexpensive electric wiring can be selected, and the durability is improved.

  Furthermore, the bonnet includes a seal member that is attached to a region including the notch at the lower end of the peripheral wall, and the portion of the seal member that is attached to the notch is the routing duct. It is preferable that the portion mounted in the other region is in elastic contact with the opening edge.

  If it does so, even if it provides a notch part and a wiring duct, like the conventional bonnet, between a bonnet and a machine room can be sealed, and silence and heat insulation can be maintained.

  Further, it is preferable that the peripheral wall portion has a corner portion bent in an L shape in the circumferential direction, and the notch portion is formed in a region sandwiching the corner portion therebetween.

  Since the elastic seal member is mounted while being deformed along the lower end portion of the peripheral wall portion, if the end portion of the notch portion is located in the vicinity of the corner portion, the deformation amount of the seal member is reduced at that portion. Larger distortion tends to increase.

  If the distortion of the seal member becomes large, the alignment along the peripheral wall portion becomes worse, and the seal member is likely to be peeled off and the durability may be lowered. However, a notch portion should be formed in a region sandwiching the corner portion therebetween. And since the edge part of a notch part is located away from a corner | angular part, along with a surrounding wall part becomes good, it becomes difficult to peel and it can also prevent a durable fall.

  In particular, a wiring duct having an open outer side is suitable for a riffmag machine as disclosed in Patent Document 1.

  Specifically, the working device has an electromagnet. The electric device is a control box installed on the upper cover adjacent to the bonnet. The work machine includes a generator installed at a position away from the control box. The control box is connected to the electromagnet and the generator via the electric wiring.

  In this case, since the electric current flowing through the electric wiring is large, the electric wiring is likely to become high temperature, and thick and expensive electric wiring is used. Therefore, if such an electrical wiring is routed through a routing duct that is open along the edge of the bonnet and has an open outer side, it can be routed at a relatively short distance and has excellent heat dissipation. Reduction of the material cost and improvement of durability.

  According to the work machine of the present invention, it is possible to properly route the electrical wiring of the electrical equipment installed around the machine room.

It is a schematic side view which shows the working machine of this embodiment. It is the schematic which looked at the part of the machine room from the upper part. FIG. 3 is a view corresponding to FIG. 2 in a state where a bonnet is opened. It is the schematic perspective view which looked at the principal part from diagonally forward. It is a schematic perspective view which shows the state by which the electrical wiring was routed. It is a schematic sectional drawing in the arrow XX line in FIG. It is the schematic which shows a modification. (A) And (b) is the schematic which shows another modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use. In addition, directions such as up, down, left, and right used in the description are based on the upper swing body and are indicated by arrows in each drawing.

  1 to 3 show a work machine 1 of the present embodiment. The work machine 1 is mainly used at a metal recycling site that handles iron scrap and the like. As will be described later, since the lifting magnet is provided, the work machine 1 is also called a lifting mag machine.

  In the riff mag machine 1, an upper swing body 1b is turnably provided on a crawler type lower travel body 1a driven by hydraulic pressure. Specifically, a trapezoidal upper frame 3 is supported by the lower traveling body 1a via a swing bearing 2, and the upper frame 3 is driven to swing by hydraulic pressure.

  A cab 4, an attachment 5, a machine room 6, and the like are installed on the upper frame 3. A control box 7 (an example of electrical equipment) is installed on the upper side of the machine room 6.

  The cab 4 is a box-shaped cab installed on the left side of the front portion of the upper frame 3. The cab 4 is provided with a seat on which an operator is seated, an operation device, and the like (not shown). The cab 4 of this model has a bulging part 4a that bulges slightly rearward of the lower part at the upper part of the rear surface, and is designed to expand the internal space.

  The attachment 5 is a working device that performs a work operation, and includes a boom 5a, an arm 5b, a lifting magnet 5c (electromagnet), and the like. The attachment 5 is installed at the front part of the upper frame 3 and is adjacent to the right side of the front part of the cab 4.

  The boom 5a is a strut member whose base end portion is pivotally supported by the upper frame 3 and moves up and down, and the arm 5b is a strut member that is swingably connected to the distal end portion of the boom 5a. The lifting magnet 5c is supported at the tip of the arm 5b. The boom 5a and the arm 5b are hydraulically operated and displace the lifting magnet 5c according to the operation of the operator.

  The lifting magnet 5c is magnetized by passing an electric current, and has a function of attracting and lifting, for example, several hundred kg of iron scrap. In the riff mag machine 1, an iron scrap transfer operation or the like is performed.

  Specifically, the lifting magnet 5c is energized to attract iron scrap, and the boom 5a and the arm 5b are operated to displace the lifting magnet 5c to the transfer destination. Then, the energization is stopped and the iron scrap is separated from the lifting magnet 5c, thereby transferring the heavy iron scrap.

  A large current is required for the lifting magnet 5c. Therefore, as shown in FIG. 2, in the lift mag machine 1, a large generator 8 that generates a current to be supplied to the lifting magnet 5 c is installed on the front side of the machine room 6.

(Machine room, machine room cover)
The machine room 6 is configured by partitioning the inside and the outside with a machine room cover 60, and is provided over the entire region in the left and right width directions of the rear part of the upper frame 3. The machine room cover 60 includes a front cover 61, a rear cover 62, an upper cover 63, the bonnet 20, and the like.

  The front cover 61 is a cover that covers the front side of the machine room 6. The front cover 61 is erected on the upper frame 3 so as to face forward, and is adjacent to the lower part of the rear surface of the cab 4 with a slight gap.

  The rear cover 62 is a cover that covers both the left and right sides and the rear side of the machine room 6. The rear cover 62 is erected along an arcuate outer edge of the rear portion of the upper frame 3. The rear cover 62 is composed of a heavy cast body or the like, and also serves as a counterweight that ensures a front-rear balance with the attachment 5 that operates.

  The upper cover 63 is a cover that covers the upper side of the machine room 6. An open air inlet 64 for taking in outside air into the inside of the machine room 6 is opened at the left end of the upper cover 63, and a hot air outlet for discharging hot air from the inside of the machine room 6 at the right end of the upper cover 63. 65 is opened (the interior of the machine room 6 is indicated by a dot pattern).

  As shown in FIG. 3, a horizontally elongated substantially rectangular opening 66 that opens the inside of the machine room 6 is formed in a wide area between the outside air inlet 64 and the hot air outlet 65 of the upper cover 63. .

  Inside the machine room 6, drive devices such as the engine 11, the heat exchange device 12, and the hydraulic pump 13 are accommodated. The boom 5a, the arm 5b, and the lower traveling body 1a are driven by these driving devices. During the maintenance, these drive devices can be accessed through the opening 66.

  The bonnet 20 is installed on the upper cover 63. The bonnet 20 is formed so that the size of the outer edge is slightly larger than that of the opening 66, and normally covers the opening 66. In the case of the riff mag machine 1, the rear side of the bonnet 20 is pivotally supported by the upper cover 63 via the hinge 21, and the opening 66 is opened and closed by swinging the bonnet 20 rearward.

  The bonnet 20 is formed so as to bulge above the upper cover 63 in order to raise the machine room 6, and has a rectangular frame-shaped peripheral wall portion 22 and an upper wall that extends continuously from the upper end portion of the peripheral wall portion 22. Part 23.

  Specifically, the peripheral wall portion 22 includes a front wall portion 22a on the swing front end side, a rear wall portion 22b on the swing base end side, and a left wall portion 22c connected to each end of the front wall portion 22a and the rear wall portion 22b. And a right wall portion 22d. At the four corners in the circumferential direction of the peripheral wall portion 22, corner portions 22 e that are curved and bent in an L shape are formed.

  As shown in FIG. 3, a substantially flat opening edge 67 extending along the edge of the opening 66 extends around the opening 66, and the lower end of the peripheral wall portion 22 is formed when the hood 20 is closed. The opening edge 67 is configured to face the upper and lower sides.

(Control box)
The control box 7 is provided to control the current supply to the lifting magnet 5c. Inside the control box 7, a control panel (not shown) equipped with a relay or the like is accommodated. As shown in FIG. 4, the control box 7 is installed on the outside air inlet 64 with a gap from the outside air inlet 64.

  Three insertion ports 7 a through which cables (electrical wiring) are inserted are provided on the front surface of the control box 7. Through these insertion openings 7a, an input cable IC connected to the generator 8, an output cable OC connected to the lifting magnet 5c, and a control cable CC are led out from the control box 7 (FIGS. 1 to 4). (The illustration of the cable is omitted.)

  The input cable IC and the output cable OC are connected inside the control box 7 via a relay provided on the control panel. A control signal is input to the control panel through the control cable CC, and the relay is connected and controlled according to the control signal. Thereby, the current generated by the generator 8 is supplied to the lifting magnet 5c according to the operation of the operator.

  All of the cable ICs, OCs, and CCs led out from the control box 7 are routed in front of the center part in the width direction of the front cover 61.

(Notch, wiring duct)
In the conventional model, these cable ICs, OCs, and CCs are routed through a gap between the cab 4 and the machine room 6. However, in this riff mag machine 1, there is no sufficient gap between the cab 4 and the machine room 6 and the bulging portion 4 a of the cab 4 protrudes above the machine room 6. Cannot be routed.

  Therefore, in the riff mag machine 1, the bonnet 20 installed on the machine room 6 adjacent to the control box 7 is used, and even in such a case, these cables IC, OC, CC can be properly routed. It was devised as follows.

  Specifically, as shown in FIG. 4, a routing duct 40 that is partitioned from the machine room 6 and extends in the circumferential direction is provided between the peripheral wall portion 22 and the opening edge portion 67.

  In the present embodiment, a notch portion 30 that is recessed from the lower end portion toward the upper end portion is formed in a partial region of the peripheral wall portion 22 so as to extend in the circumferential direction, whereby the notch portion 30 and the opening edge portion 67 are formed. A wiring duct 40 is provided in a gap generated between the cables IC, OC, and CC via the wiring duct 40 as shown in FIG.

  Specifically, the notch 30 includes a front end portion of the left wall portion 22c sandwiching the left front corner portion 22e of the peripheral wall portion 22, a portion from the left end of the front wall portion 22a to the middle in the left-right width direction, It is formed in the region that reaches. The notch 30 is connected to a pair of notched end portions 31, 31 that are inclined upwardly from the lower end edge of the peripheral wall portion 22, and is connected between the notched end portions 31, 31, and extends from the lower end portion to the upper end portion of the peripheral wall portion 22. And a notch edge 32 extending in the circumferential direction at a position apart from the side.

  A weather strip 25 (seal member) is attached to the lower end portion of the peripheral wall portion 22 in order to seal a gap between the bonnet 20 and the machine room cover 60.

  The weather strip 25 is an elongated rubber member having a slit extending in the longitudinal direction. The weather strip 25 is attached to a predetermined region at the lower end portion of the peripheral wall portion 22 including the notch portion 30.

  The weather strip 25 is mounted with the lower end portion of the peripheral wall portion 22 sandwiched between the slits while being deformed along the lower end portion of the peripheral wall portion 22. At this time, if the cut-out end portion 31 is positioned in the vicinity of the corner portion 22e, the deformation amount of the weather strip 25 increases at that portion, and the distortion tends to increase.

  When the distortion of the weather strip 25 becomes large, the alongside of the peripheral wall portion 22 is deteriorated, and the weather strip 25 is easily peeled off, which may reduce durability. On the other hand, in this riff mag machine 1, since the notch end portion 31 is disposed at a position away from the corner portion 22e, the weather strip 25 is better attached to the peripheral wall portion 22 and is difficult to peel off and is durable. It is possible to prevent a decrease in sex.

  As shown in FIG. 3, the routing duct 40 corresponds to the notch portion 30, and includes a front end portion of the left opening edge portion 67 sandwiching a left front corner portion of the opening edge portion 67, and a front side portion. The opening edge 67 is provided in a region extending from the left end to the middle in the left-right width direction.

  The routing duct 40 has an L-shape when viewed from above, and is attached on the upper cover 63. The left end portion of the routing duct 40 is located in the vicinity of the control box 7, and the right end portion of the routing duct 40 is located in the vicinity of the generator 8.

  As shown in FIG. 6, the wiring duct 40 has a U-shaped cross section. That is, the routing duct 40 protrudes upward from the opening edge 67 and extends outward from the upper end of the inner surface 41 so as to face the opening 41 and the inner surface 41 extending along the notch 30. And an outer surface of the wiring duct 40 facing the inner side surface portion 41 is open.

  The routing duct 40 also has inclined surface portions 43 having shapes corresponding to the notched end portions 31 of the notched portions 30 at both ends thereof, and both the end portions of the routing duct 40 are blocked by these inclined surface portions 43 and 43. It is.

  The wiring duct 40 further includes an overhanging portion 44 projecting leftward from the left front corner of the opening edge 67. A fastening portion 44 a that fixes the routing duct 40 to the upper cover 63 is provided at the protruding end of the overhang portion 44. By providing the fastening portion 44a at a position away from the corner portion, the routed cables IC, OC, CC can be prevented from contacting the bolt.

  The weather strip 25 is in elastic contact with the opening edge 67 and the wiring duct 40. Specifically, in the weather strip 25, the portions attached to the notched end portion 31 and the notched edge portion 32 are in elastic contact with the inclined surface portion 43 and the upper surface portion 42, and the portions attached to other regions are The opening edge 67 is in elastic contact.

  Therefore, even if the notch 30 is formed in the bonnet 20, the routing duct 40 closes the gap between the bonnet 20 and the upper cover 63, so that the silence and heat insulation of the machine room 6 are improved. Can be maintained.

  As shown in FIGS. 5 and 6, the three cables IC, OC, CC led out from the insertion port 7 a are bundled using a binding material 70 fixed at a plurality of locations of the routing duct 40, and the routing is performed. It is routed up to above the generator 8 via the duct 40.

  After the cables IC, OC, CC routed above the generator 8 are routed downward along the front cover 61, the input cable IC is connected to the generator 8. The output cable OC and the control cable CC are further routed forward along the upper frame 3 from there, the output cable OC is connected to the lifting magnet 5c, and the control cable CC is connected to the control system.

  Therefore, even if there is no gap between the cab 4 and the machine room 6, these cables IC, OC, CC can be easily routed. Since the upper surface portion 42 is covered above the cable ICs, OC, and CC, the cable ICs, OC, and CC can be effectively protected even if an obstacle jumps during the work.

  In particular, since the outer side of the wiring duct 40 is open and has a structure with excellent heat dissipation, temperature rise of the input cable IC and the output cable OC through which a large current flows can be suppressed. Thereby, an expensive electric wire excellent in heat resistance and heat dissipation becomes unnecessary, and the member cost can be reduced.

  In addition, the working machine according to the present invention is not limited to the above-described embodiment, and includes various other configurations.

  In the embodiment, the riff mag machine has been described as an example, but the present invention can also be applied to a hydraulic excavator or a crane. The electrical device is not limited to the control box, and any device that requires electrical wiring such as a camera or a light can be applied.

  The area | region which provides the notch 30 and the wiring duct 40 can be set according to a specification.

  For example, as shown in FIG. 7, when the electrical equipment EA is installed above the rear part of the machine room 6, the notch part 30 and the wiring are provided in the region extending from the front side to the rear side of the bonnet 20 and the opening edge part 67. By providing the duct 40, the electric wiring C can be properly routed without going through the inside of the machine room 6.

  The wiring duct 40 is preferably formed in a U-shaped cross section, but may be in a cylindrical shape. The bonnet 20 may be a lateral opening that swings in the left-right direction, or may be a removable type that can be removed from the machine room cover 60.

  As shown in FIG. 8A, a rectangular frame-shaped wiring duct 40 ′ may be installed between the bonnet 20 and the upper cover 63 of the machine room 6 so as to raise the bonnet 20. In this case, the hinge 21 may be attached to the wiring duct 40 ′, or may be attached to the machine room cover 60 via a bracket or the like.

  As shown in FIG. 8B, the electric wiring C may be routed not only to the entire routing duct 40 'but also to a part thereof. A plurality of electrical wirings C having different connection destinations may be routed to the same site or different sites of the routing duct 40 '. The unnecessary portion of the opening facing the outside of the wiring duct 40 ′ may be blocked by attaching the cover member 45 to the wiring duct 40 ′. That way you can look good.

1 Work machine 5 Attachment (work machine)
6 Machine room 7 Control box (electrical equipment)
20 Bonnet 22 Peripheral wall 23 Upper wall 30 Notch 40 Routing duct 60 Machine room cover 61 Front cover 62 Rear cover 63 Upper cover 66 Opening 67 Opening edge IC Input cable (electrical wiring)
OC output cable (electrical wiring)
CC control cable (electrical wiring)

Claims (5)

A working device for performing the work movement;
A machine room that houses a drive device that drives the working device, and is partitioned by a machine room cover;
Electrical equipment installed around the machine room;
A working machine with
The machine room cover is
An upper cover formed with an opening for opening the inside of the machine room;
A bonnet installed to bulge above the upper cover and capable of opening and closing the opening;
Have
The bonnet is
A frame-shaped peripheral wall disposed on an opening edge extending around the opening;
An upper wall portion that is connected to an upper end portion of the peripheral wall portion and covers an upper portion of the opening;
Have
Between the peripheral wall portion and the opening edge portion, a routing duct that is partitioned from the machine room and extends in the circumferential direction is provided,
A work machine in which electrical wiring connected to the electrical equipment is routed via the routing duct. The work machine according to claim 1,
In at least a partial region of the peripheral wall portion, a notch portion that is recessed from the lower end portion toward the upper end portion is formed to extend in the circumferential direction,
The routing duct is
An inner side surface projecting upward from the opening edge and extending along the notch,
An upper surface portion projecting outward from the upper end of the inner side surface portion so as to face the opening edge portion;
Have
A work machine in which an outside of the wiring duct facing the inner side surface portion is opened. The work machine according to claim 2,
The bonnet has a seal member that is attached to a region including the notch at the lower end of the peripheral wall,
Of the sealing member, a portion mounted on the cutout portion is in elastic contact with the wiring duct, and a portion mounted on the other region is elastically in contact with the opening edge. The work machine according to claim 3,
The peripheral wall portion has a corner portion bent in an L shape in the circumferential direction,
A work machine in which the notch is formed in a region sandwiching the corner. In the work machine according to any one of claims 2 to 4,
The working device has an electromagnet,
The electrical device is a control box installed on the upper cover adjacent to the bonnet,
The work machine includes a generator installed at a position away from the control box,
A work machine in which the control box is connected to the electromagnet and the generator via the electrical wiring.

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