JP5554251B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine including a counterweight such as a hydraulic excavator or a hydraulic crane.

  In general, a construction machine such as a hydraulic excavator is configured such that a vehicle body is configured by a self-propelled lower traveling body and an upper revolving body that is turnably mounted on the lower traveling body, and is provided on the upper revolving body so as to be able to move up and down. The excavation work etc. of earth and sand etc. are performed using the work device provided. Here, the upper swing body has a swing frame as a base, a work device is attached to the front side of the swing frame, and a counterweight that balances the weight of the work device on the rear side of the swing frame. Is provided.

  By the way, on the counterweight of the excavator, for example, a rear monitoring camera that monitors the back of the excavator, an illumination light that illuminates the back of the excavator during night work, an indicator light that displays the operating status of the excavator, and a position relative to the excavator It is known to attach electrical components such as a GPS antenna that transmits and receives information signals. Hereinafter, as a specific example of the electrical component, a case where the rear monitoring camera is attached to the counterweight will be described as an example.

  That is, a hydraulic excavator equipped with a rear monitoring camera at the rear end of a counterweight is known in order to compensate for the field of view behind the vehicle body, which is a blind spot for an operator in the cab during excavation work. This hydraulic excavator connects, for example, a drive device or a monitor device arranged in the cab and a rear monitoring camera by electric wiring, and displays an image photographed by the rear monitoring camera on the monitor device in the cab, Even when the operator is seated in the driver's seat in the cab, the rear of the excavator can be confirmed.

  The hydraulic excavator equipped with the rear monitoring camera according to the prior art has a configuration in which a concave portion in which a part thereof is recessed downward is provided on the upper surface of the counterweight, and a plate-like fixing member is provided in the concave portion. The rear monitoring camera is attached to the upper surface of the fixed member, and the electrical wiring connected to the rear monitoring camera extends to the vehicle body side through the recess of the counterweight (see, for example, Patent Document 1).

JP 2008-231726 A

  By the way, when a large hydraulic excavator with a large bucket capacity is transported to the work site, for example, the work device and the counterweight are removed from the vehicle body, and the vehicle body, the work device, and the counterweight are individually transported by the transport vehicle. After that, a method of attaching the working device and the counterweight to the vehicle body at the work site is adopted.

  As described above, in the case of a large excavator that needs to attach and remove the counterweight to the vehicle body during transportation, the rear monitoring camera is attached to and removed from the counterweight according to the attachment and removal of the counterweight. There is a problem that complicated work is required and the workability of the transportation work is lowered.

  On the other hand, for example, if you forget to remove the rear monitoring camera from the counter weight and remove the counter weight from the vehicle body with the rear monitoring camera attached, the connecting part between the rear monitoring camera and the electrical wiring will be damaged and expensive. There is a problem that the rear monitoring camera is damaged.

  The present invention has been made in view of the above-described problems of the prior art. When the counterweight is attached to or detached from the vehicle body, the electrical wiring extending from the electrical component mounted on the counterweight to the vehicle body side is easily connected. It is an object of the present invention to provide a construction machine that can be cut or cut.

In order to solve the above-mentioned problems, the present invention comprises a self-propelled vehicle body, a working device provided on the front side of the vehicle body, and a block body for balancing the weight of the working device, and the front surface is A counterweight provided on the rear side of the vehicle body facing the rear end side of the vehicle body, an electrical component attached to the counterweight for monitoring, illumination and transmission / reception operations, and one end side connected to the electrical component The other end side is provided with an electrical wiring extending to the vehicle body side, and the upper surface of the counterweight is provided with a wiring receiving recess in which the upper surface and the front surface are opened by recessing a part of the upper surface downward, The counterweight is provided with a recess closing plate that closes the wiring receiving recess, and the recess closing plate has a notch groove extending forward and rearward at the position of the wiring receiving recess and having a front end side as an open end. A slit having a long groove extending in the front and rear directions is provided adjacent to the notch groove, and a lid covering the notch groove and the slit is detachably provided on the recess closing plate, and the electrical component is provided. Is fixed to the lid body, and a hook member is provided on the lower surface side of the lid body to prevent the lid body from detaching upward and downward from the recess closing plate by engaging the slit. It is applied to the construction machine provided .

The feature of the configuration invention of claim 1 is employed, the prior SL electrostatic sign lines, and electrical equipment side wiring is one end connected to said electrical component other end is guided to the wire accommodating recess, the one end The electrical component side wiring is connected to the other end side of the electrical component side wiring via a connector, and the other end side is configured by a vehicle body side wiring extending from the counterweight to the vehicle body side. A wiring fixing bracket for fixing the wiring , the wiring fixing bracket being positioned between the opening end of the notch groove and disposed between the bottom surface of the wiring receiving recess and the recess closing plate, and the wiring fixing The brackets are fixed to the bottom surface of the wiring housing recess and the recess closing plate, respectively .

The invention of claim 2 is that the wiring fixing bracket is arranged at a portion sandwiched between the notch groove and the slit .

According to a third aspect of the present invention, the lid includes a first lid to which the electrical component is fixed, and a second lid that is disposed adjacent to the first lid and covers the wiring fixing bracket. This is because of the configuration.

According to the first aspect of the present invention, the other end side of the electrical component side wiring and the one end side of the vehicle body side wiring can be connected via the connector in the wiring accommodating recess provided on the upper surface of the counterweight. For this reason, for example, when transporting a construction machine, the electrical component side wiring and the vehicle body side wiring can be easily connected (attached) or disconnected with the work of attaching and removing the counterweight to the vehicle body (cutting ( Can be removed). Accordingly, it is possible to eliminate the troublesome work of attaching and detaching the electrical component itself to / from the counterweight, and the workability when attaching and detaching the counterweight can be improved. In addition, the operation of connecting and disconnecting the electrical component side wiring and the vehicle body side wiring via the connector can be performed quickly and easily in a large working space of the wiring accommodating recess.
In addition, by attaching the lid to which the electrical component is fixed to the recess closing plate, the other end side of the electrical component side wiring whose one end side is connected to the electrical component is surely led out to the wiring accommodating recess through the notch groove. Can do. Then, the other end side of the electrical component side wiring led out to the wiring housing recess can be securely fixed by the wiring fixing bracket and can be easily connected to one end side of the vehicle body side wiring via the connector. . Moreover, by covering the notch groove with the lid, the electrical component side wiring and the vehicle body side wiring housed in the wiring housing recess can be shielded from the outside, and these wirings can be protected.
Furthermore, when attaching the lid to which the electrical component is fixed to the recess closing plate, the hook member provided on the lower surface side of the lid is engaged with the slit of the recess closing plate, for example, to close the lid. Even when the bolts attached to the plate are removed, it is possible to prevent the lid body from separating upward and downward from the recessed portion closing plate, and to prevent the electrical component from being stolen.

Further, by fixing the electrical component side wiring led out in the wiring accommodating recess using the wiring fixing bracket, the electrical component and the electrical component side wiring can be integrated with the counterweight. For this reason, for example, even if the counterweight is removed from the vehicle body while the electrical component side wiring and the vehicle body side wiring are connected, the electrical component side wiring is not forcibly extracted from the electrical component, and is expensive. Electrical components can be protected.
In this case, since the wiring fixing bracket is located near the opening end of the notch groove and is provided between the bottom surface of the wiring receiving recess and the recess closing plate, the portion near the notch groove in the recess closing plate. Can be reinforced by the wiring fixing bracket. As a result, it is possible to prevent the recess closing plate from being easily deformed or damaged by an external force, and it is possible to prevent a theft accident with respect to the electrical component attached to the recess closing plate.
In addition, since the slit of the recess closing plate is provided adjacent to the notch groove, the slit of the slit is provided by the wiring fixing bracket provided between the bottom surface of the wiring receiving recess and the recess closing plate in the vicinity of the notch groove. The surroundings can also be reinforced. As a result, for example, even if the lid member is forcibly pulled upward with the hook member of the lid engaged with the slit, it is possible to suppress deformation or breakage of the periphery of the slit. Theft accidents can be reliably prevented.

According to the invention of claim 2, the opening end of the notch groove and the periphery of the slit in the recess closing plate can be reinforced by the wiring fixing bracket .

According to the third aspect of the present invention, the second lid is fixed to the wiring fixing bracket by removing only the second lid from the recess closing plate while the first lid to which the electrical component is fixed is attached to the recess closing plate. The electrical component side wiring can be exposed to the outside. Therefore, the work of connecting the electrical component side wiring and the vehicle body side wiring via the connector and the operation of cutting the electrical component side wiring and the vehicle body side wiring are only performed by removing only the second lid from the recess closing plate. This can be done quickly and easily, and the workability can be improved.

1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is the perspective view which looked at the counterweight of a hydraulic excavator, a back surveillance camera, an engine cover, etc. from back. It is a perspective view of the principal part expansion which shows a counterweight, a back monitoring camera, a 1st, 2nd cover body, etc. It is a disassembled perspective view which shows a recessed part obstruction board, a notch groove, a wiring accommodation recessed part, a wiring fixing bracket, a 1st, 2nd cover body, a rear monitoring camera, etc. It is the top view which looked at the back surveillance camera, camera side wiring, vehicle body side wiring, wiring fixing bracket, wiring accommodation recessed part, etc. from the upper direction of the counterweight. FIG. 6 is a cross-sectional view of the rear monitoring camera, camera side wiring, vehicle body side wiring, wiring fixing bracket, wiring housing recess, and the like viewed from the direction of arrows VI-VI in FIG. 5. FIG. 6 is a plan view of the same position as in FIG. 5 when the wiring housing recess, the wiring fixing bracket, the vehicle body side wiring, and the like are viewed from above with the first and second lids removed. FIG. 8 is a plan view of the same position as in FIG. 7 in which the wiring housing recess, the wiring fixing bracket, the rear monitoring camera, the camera side wiring, the vehicle body side wiring, and the like are viewed from above with the first lid attached. It is sectional drawing which looked at the recessed part obstruction board, the slit, the wiring accommodation recessed part, the rear monitoring camera, the 1st cover body, the hook member, etc. from the arrow IX-IX direction in FIG. It is sectional drawing of the same position as FIG. 9 which shows the state which attaches a 1st cover body to a recessed part obstruction | occlusion board. It is the top view of the same position as FIG. 7 which looked at the state which connected the camera side wiring and the vehicle body side wiring from upper direction.

  Hereinafter, a case where an embodiment of a construction machine according to the present invention is applied to a hydraulic excavator will be described as an example and described in detail with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a hydraulic excavator as a typical example of a construction machine. The body of the hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2 and an upper revolving body 3 that is turnably mounted on the lower traveling body 2. A working device 4 is provided on the front side of the upper swing body 3 so as to be able to move up and down, and the working device 4 is used for excavating soil and the like.

  Here, the upper revolving structure 3 has a revolving frame 5 that forms a support structure, and a base end portion of the working device 4 is rotatably attached to the front end side of the revolving frame 5. On the other hand, on the rear end side of the revolving frame 5, a counterweight 10 to be described later is attached to balance the weight with the work device 4.

  Further, a cab 6 on which an operator who operates the hydraulic excavator 1 gets in is disposed on the left side of the front part of the swivel frame 5, and an engine, a hydraulic pump, a heat exchange device and the like are mounted on the front side of the counterweight 10. A building cover 7 for housing equipment (not shown) is provided. Here, the building cover 7 extends in the horizontal direction between the left and right side plates 7A which are located on the left and right sides of the revolving frame 5 and extend in the front and rear directions, and the upper ends of the side plates 7A. And the rear end side of the building cover 7 is closed by a counterweight 10.

  Reference numeral 8 denotes an engine cover provided on the upper surface plate 7B of the building cover 7, and the engine cover 8 covers mounted devices housed in the building cover 7 from above. As shown in FIGS. 2 to 4, the engine cover 8 includes a fixed cover 8A positioned on the right side in the left and right directions, and an opening / closing cover 8B disposed adjacent to the left side of the fixed cover 8A. ing.

  Here, the open / close cover 8B covers devices that require periodic maintenance work, for example, engines, heat exchangers, and the like among the mounted devices housed in the building cover 7 so as to be openable and closable from above. . In this case, a cover support frame 9 constituting a part of the revolving frame 5 is provided on the rear end side of the revolving frame 5 so as to extend in the left and right directions. The cover support frame 9 supports the hinge member 8C. As a result, the opening / closing cover 8B is configured such that the front end side thereof rotates forward and backward (upward and downward) with the hinge members 8C as fulcrums (see FIG. 2).

  Next, the counterweight used in this embodiment will be described.

  That is, reference numeral 10 denotes a counterweight that balances the weight with the work device 4. The counterweight 10 is a swing frame in a state of facing the rear end side of the building cover 7 constituting the upper swing body 3 in the front and rear directions. 5 is disposed on the rear end side. The counterweight 10 is formed as a block body having a can manufacturing structure constituted by a casing 11 forming an outer shell and a weight adjusting member 13 filled in the casing 11.

  Here, the housing 11 of the counterweight 10 has a rectangular front surface 11A extending left and right while facing the rear end side of the building cover 7, and left and right while curving in an arc shape in the left and right directions. A rear surface 11B extending in the direction, a crescent-shaped upper surface 11C extending leftward and rightward when viewed from above, and a crescent-shaped lower surface 11D similar to the upper surface 11C. Is constituted by an upper surface plate 12 described later.

  On the other hand, two lifting brackets 11E and 11F are provided on the upper surface 11C side of the housing 11 so as to be spaced apart to the left and right, and when the counterweight 10 is removed from the excavator 1 and transported individually, A wire rope (not shown) is hung on these left and right lifting brackets 11E and 11F, and the wire rope is lifted by a hydraulic crane or the like, so that the counterweight 10 can be attached to and detached from the upper swing body 3. It has a configuration that can be performed.

  Reference numeral 12 denotes an upper surface plate constituting the upper surface 11C of the housing 11, and the upper surface plate 12 includes a left upper surface plate 12A located on the left side in the left and right directions and a left and right direction as shown in FIGS. The right upper surface plate 12B is located on the right side of the left upper surface plate 12A and the central upper surface plate 12C is located between the left upper surface plate 12A and the right upper surface plate 12B, and has a crescent shape extending in the left and right directions as a whole. In this case, for example, as shown in FIG. 9, the left end side of the central upper surface plate 12C is fixed to the lower surface side of the left upper surface plate 12A, and the right end side of the central upper surface plate 12C is fixed to the lower surface side of the right upper surface plate 12B. A step corresponding to the plate thickness of the recess closing plate 15 described later is formed between the upper surface of the right upper surface plate 12B and the upper surface of the central upper surface plate 12C. In addition, a wiring housing recess 14 described later is provided in the central portion in the left and right directions of the central upper surface plate 12C.

  Next, reference numeral 14 denotes a wiring accommodating recess provided in the upper surface 11C of the counterweight 10 (the casing 11). The wiring accommodating recess 14 accommodates a camera side wiring 21 and a vehicle body side wiring 22 to be described later. Is. Here, as shown in FIG. 4 and FIG. 9 and the like, the wiring housing recess 14 has a bottom surface 12C1 of the central upper surface plate 12C that is depressed downwardly from the central portion of the central upper surface plate 12C that constitutes the upper surface 11C of the housing 11. And a rectangular parallelepiped space extending in the front and rear directions surrounded by the left side surface 12C2, the right side surface 12C3, and the rear surface 12C4. Therefore, the upper side of the wiring housing recess 14 is open to the upper surface 11C (central upper surface plate 12C) of the housing 11, and the front side of the wiring housing recess 14 is opened to the front surface 11A of the housing 11.

  Reference numeral 15 denotes a recess closing plate provided on the upper surface side of the counterweight 10. The recess closing plate 15 is disposed on the central upper surface plate 12C constituting the upper surface 11C of the housing 11, and is provided on the central upper surface plate 12C. The wiring accommodating recess 14 is closed. Here, the recess closing plate 15 is formed of a rectangular flat plate extending in the left and right directions, and is welded to the upper surface of the central upper surface plate 12C so as to cover the wiring housing concave portion 14 provided on the central upper surface plate 12C from above. It is fixed using the means. In this case, as shown in FIG. 9, the upper surface of the central upper surface plate 12C is one step lower than the upper surfaces of the left upper surface plate 12A and the right upper surface plate 12B by the thickness of the recess closing plate 15. Therefore, the upper surfaces of the left upper surface plate 12A and the right upper surface plate 12B and the upper surface of the concave portion closing plate 15 form substantially the same plane with the concave portion closing plate 15 fixed to the upper surface of the central upper surface plate 12C.

  On the other hand, a portion of the recess closing plate 15 corresponding to the wiring housing recess 14 has two front bolt holes (female screw holes) 15A that are spaced left and right across a notch groove 16 described later, A total of four rear bolt holes (female screw holes) 15B are provided on the left side and the right side, with the notch groove 16 interposed therebetween, arranged behind the front bolt hole 15A. A rear monitoring camera 20 to be described later is disposed on the rear side of the recess closing plate 15.

  Reference numeral 16 denotes a notch groove provided in the recess closing plate 15. The notch groove 16 is formed in a portion of the recess closing plate 15 corresponding to the wiring housing recess 14, and extends from the front end of the recess closing plate 15. It extends linearly forward and backward to the vicinity of the end. In this case, the notch groove 16 is located on the front end side of the recess closing plate 15 and has a wide groove portion 16A which is widened in the left and right directions, and extends from the wide groove portion 16A to the rear end side of the recess closing plate 15 on the left side. The front end side of the notch groove 16 (wide groove part 16A) is an open end 16C that opens to the front end edge of the recess closing plate 15. Thereby, a large working space is secured in a portion of the wiring housing recess 14 corresponding to the wide groove portion 16A.

  As described above, the wiring accommodating recess 14 formed in the counterweight 10 communicates with the upper space (outside) of the recess closing plate 15 within the range of the notch groove 16. Accordingly, the camera side wiring 21 to be described later is guided into the wiring accommodating recess 14 from above the recess closing plate 15 through the notch groove 16, and the vehicle body side wiring 22 to be described later is closed to the recess through the opening end 16C of the notch groove 16. The structure is such that it is led into the wiring housing recess 14 from the front (vehicle body side) of the plate 15.

  The other end side of the camera side wiring 21 led out into the wiring accommodating recess 14 is fixed to the wiring fixing bracket 18 by using a binding band 19, and a connector 21 </ b> A provided on the other end side of the camera side wiring 21. The connector 22A provided on one end side of the vehicle body side wiring 22 extending from the vehicle body side into the wiring housing recess 14 is connected at the position of the wide groove portion 16A of the notch groove 16 in the vicinity of the wiring fixing bracket 18. Is done.

  Reference numeral 17 denotes a slit provided in the recess closing plate 15 adjacent to the notch groove 16. The slit 17 is formed as a narrow linear groove extending forward and backward from the front edge of the recess closing plate 15 along the notch groove 16, and the front end side of the slit 17 is the front end of the recess closing plate 15. It becomes the opening end 17A opened to the edge. The slit 17 allows the first lid 23 to move forward and rearward by engaging a hook member 26 described later provided in the first lid 23 described later, and closes the recess. This prevents the plate 15 from separating upward and downward.

  Next, the wiring fixing bracket used in the present embodiment will be described.

  That is, reference numeral 18 denotes a wiring fixing bracket provided in the wiring housing recess 14, and the wiring fixing bracket 18 fixes a camera side wiring 21 to be described later. Here, the wiring fixing bracket 18 is formed in a rectangular flat plate shape that extends in the front and rear directions using, for example, a steel plate, and is located in the vicinity of the opening end 16C of the notch groove 16 and the opening end 17A of the slit 17, It is disposed between the bottom surface 12C1 of the central upper surface plate 12C constituting the bottom surface of the wiring housing concave portion 14 and the concave portion closing plate 15.

  The lower end portion of the wiring fixing bracket 18 is fixed to the bottom surface of the wiring accommodating recess 14 (the bottom surface 12C1 of the central upper surface plate 12C) by means of welding or the like, and the upper end portion is welded to the lower surface of the recess closing plate 15 or the like. It is fixed using the means. As a result, a portion of the recess closing plate 15 sandwiched between the notch groove 16 and the slit 17 can be reinforced by the wiring fixing bracket 18, and the recess closing plate 15 in which the notch groove 16 and the slit 17 are formed. The overall strength can be increased.

  In addition, a through hole (not shown) penetrating in the thickness direction is formed in the center portion of the wiring fixing bracket 18 and a binding band 19 is attached using the through hole ( (See FIG. 4). The camera-side wiring 21 can be firmly fixed to the wiring fixing bracket 18 by binding the camera-side wiring 21 described later with the binding band 19.

  Next, reference numeral 20 denotes a rear monitoring camera as an electrical component attached to the upper surface side of the counterweight 10. The rear monitoring camera 20 is constituted by a CCD camera or the like, for example, and is detachably attached to the recess closing plate 15 via a first lid body 23 described later. Here, the rear monitoring camera 20 captures a range behind the counterweight 10 that is a blind spot for an operator in the cab 6, and an image captured by the rear monitoring camera 20 is a monitor disposed in the cab 6. By displaying on the device (not shown), the operator can monitor (confirm) the rear of the counterweight 10 by the image displayed on the monitor device while operating the excavator 1 in the cab 6. The rear monitoring camera 20 is a representative example of electrical components. On the upper surface side of the counterweight 10, for example, an illumination lamp for night work, a display lamp for displaying an operation state, a GPS antenna for transmitting / receiving a position information signal, etc. Other electrical components may be attached.

  In this case, the rear monitoring camera 20 is connected to, for example, a monitor device or a drive device (not shown) disposed in the cab 6 via an electrical wiring (harness), and this electrical wiring is connected to a camera side wiring 21 described later. The vehicle body side wiring 22 is comprised.

  Reference numeral 21 denotes camera side wiring as electrical component side wiring. One end side of the camera side wiring 21 is connected to the rear monitoring camera 20. On the other hand, the other end side of the camera side wiring 21 is led out into the wiring accommodating recess 14 through the notch groove 16 of the recess closing plate 15, and a connector 21 </ b> A is attached to the other end side of the camera side wiring 21.

  Reference numeral 22 denotes a vehicle body side wire that constitutes an electric wire together with the camera side wire 21, and a connector 22 A is attached to one end side of the vehicle body side wire 22. The camera side wiring 21 is detachably connected to the connector 21A. On the other hand, the other end side of the vehicle body side wiring 22 extends into the cab 6 from the counterweight 10 through the building cover 7 of the upper swing body 3, for example, a monitor device or a drive device (not shown) disposed in the cab 6. It is connected to the.

  Reference numeral 23 denotes a first lid body that is detachably attached to the recess closing plate 15 of the counterweight 10, and the first lid body 23 includes the narrow groove portion 16 </ b> B of the notch groove 16 and the rear end side of the slit 17. And the rear monitoring camera 20 is fixed. Here, as shown in FIGS. 4 to 6, the first lid 23 is formed in a rectangular flat plate shape extending in the front and rear directions using a steel plate or the like, and the left and right sides of the first lid 23. On both sides in the direction, four bolt insertion holes (not shown) corresponding to the four rear bolt holes 15B provided in the recess closing plate 15 are formed. And the 1st cover body 23 is detachably attached to the recessed part obstruction | occlusion board 15 by screwing the volt | bolt 24 inserted in each bolt insertion hole to each rear side bolt hole 15B of the recessed part obstruction | occlusion board 15. It is.

  In addition, three nuts 23A are fixed to the upper surface of the rear portion of the first lid body 23 by welding, and square holes 23B are provided in the vicinity of each nut 23A so as to penetrate upward and downward. Yes. The rear monitoring camera 20 is fixed to the upper surface side of the first lid 23 by bolts (not shown) screwed to the nuts 23A, and the camera side wiring 21 connected to the rear monitoring camera 20 is Then, it is guided to the lower surface side of the first lid body 23 through the square hole 23B (see FIG. 4).

  On the other hand, on the lower surface side of the first lid body 23, two wiring holders 23 </ b> C bent in an L shape are provided apart from each other in the front and rear directions and guided to the lower surface side of the first lid body 23. The camera-side wiring 21 thus held is held by each wiring holder 23C via a wiring clip 25 shown in FIGS. Thus, as shown in FIG. 8, the other end side of the camera-side wiring 21 is attached to the recess closing plate 15 using the bolt 24 with the first cover body 23 to which the rear monitoring camera 20 is fixed. It is guided to the vicinity of the wiring fixing bracket 18 through the notch groove 16 and is bound by a binding band 19 attached to the wiring fixing bracket 18.

  Reference numeral 26 denotes a hook member provided on the lower surface of the front end portion of the first lid 23. The hook member 26 is a plate that is bent into a square shape (as shown in FIGS. 9 and 10). And is fixed to the lower surface of the first lid body 23 by means of welding or the like. The hook member 26 engages with the slit 17 formed in the recess closing plate 15 through the opening end 17 </ b> A, so that the first lid 23 moves forward and backward along the slit 17. It is allowed to prevent the slit 17 from detaching upward and downward.

  When the first lid 23 is attached to the recess closing plate 15, the opening end 17A of the slit 17 provided in the recess closing plate 15 is removed with the cover support frame 9 supporting the opening / closing cover 8B of the engine cover 8 removed. From the side, the hook member 26 is inserted into the slit 17 and engaged. In this way, by attaching the cover support frame 9 to the revolving frame 5 with the hook member 26 of the first lid 23 engaged with the slit 17 of the recess closing plate 15, the hook member 26 moves forward. Can be limited by the cover support frame 9. Therefore, unless the cover support frame 9 is removed again, the hook member 26 is not detached from the slit 17 and the first lid 23 cannot be removed from the recess closing plate 15.

  Reference numeral 27 denotes a second lid disposed adjacent to the front side of the first lid 23, and the second lid 27 is detachably attached to the recess closing plate 15 of the counterweight 10 and is cut off. The wide groove portion 16A of the notch groove 16, the slit 17, and the wiring fixing bracket 18 are covered from above.

  Here, the second lid body 27 is formed in a rectangular flat plate shape that extends in the left and right directions using a steel plate or the like, and the recess lid plate 15 is provided on both the left and right sides of the second lid body 27. Two bolt insertion holes (not shown) corresponding to the two front bolt holes 15A provided are drilled, and bolts 28 are inserted into these bolt insertion holes. Accordingly, when the bolt 28 is screwed into the front bolt hole 15A of the recess closing plate 15, the second lid 27 is attached to the recess closing plate 15 and covers the wiring fixing bracket 18 and the like from above. On the other hand, when the bolt 28 is removed from the front bolt hole 15A of the recess closing plate 15 and the second lid 27 is removed from the recess closing plate 15, the wide groove portion 16A of the notch groove 16, the wiring fixing bracket 18 and the like are exposed to the outside. Can be exposed.

  Therefore, for example, when the counterweight 10 is removed from the excavator 1 during transportation, only the second lid 27 is removed from the recess closing plate 15 to remove the wiring fixing bracket 18 and the wiring fixing as shown in FIG. The connector 21A of the camera side wiring 21 fixed to the bracket 18 and the connector 22A of the vehicle body side wiring 22 connected to the connector 21A are exposed to the outside, and the connector 21A of the camera side wiring 21 and the connector 22A of the vehicle body side wiring 22 Can be quickly and easily separated.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. The hydraulic excavator 1 self-travels to the excavation site by the lower traveling body 2 and then turns the upper revolving body 3 while rotating the working device 4. Use it for excavation work.

  At this time, the rear monitoring camera 20 attached to the counterweight 10 images the rear of the counterweight 10 that is a blind spot for the operator in the cab 6, and the image captured by the rear monitoring camera 20 is in the cab 6. It is displayed on the arranged monitor device. Thereby, the operator who operates the hydraulic excavator 1 in the cab 6 can confirm the back of the counterweight 10 by the image displayed on the monitor device, and can improve safety such as excavation work.

  By the way, the hydraulic excavator 1 according to the present embodiment removes the counterweight 10 from the upper swing body 3 (vehicle body) during transportation to a work site where excavation work is performed, and after the counterweight 10 is individually transported by a transport vehicle. The counterweight 10 is attached to the upper swing body 3 at the work site.

  For this reason, when the counterweight 10 is removed from the upper swing body 3, the camera-side wiring 21 connected to the rear monitoring camera 20, the monitor device and the drive device arranged in the cab 6 prior to the removal work. It is necessary to cut the vehicle body side wiring 22 connected to (not shown), and the operation of cutting (separating) between the camera side wiring 21 and the vehicle body side wiring 22 will be described below.

  First, in a state where the counterweight 10 is attached to the upper swing body 3, as shown in FIGS. 5 and 6, the camera side wiring 21 and one end side of the vehicle body side wiring 22 are accommodated in the wiring accommodating recess 14. The camera side wiring 21 is fixed to the wiring fixing bracket 18 by using a binding band 19. The connector 21 </ b> A of the camera side wiring 21 and the connector 22 </ b> A of the vehicle body side wiring 22 are connected at the position of the wide groove portion 16 </ b> A of the notch groove 16 provided in the recess closing plate 15.

  At this time, the first cover body 23 to which the rear monitoring camera 20 is fixed is fixed to the recess closing plate 15 using bolts 24, and the second cover body 27 is fixed to the recess closing plate 15 using bolts 28. The first and second lid bodies 23 and 27 cover the cutout grooves 16 formed in the recess closing plate 15 from above. Thereby, the camera side wiring 21 and the vehicle body side wiring 22 accommodated in the wiring accommodating recess 14 can be shielded from the outside, and the camera side wiring 21 and the vehicle body side wiring 22 can be protected.

  Next, by removing the bolt 28 for fixing the second lid 27 from the recess closing plate 15, the first lid 23 is fixed to the recess closing plate 15 as shown in FIG. Only the second lid 27 is removed from the recess closing plate 15. Thereby, the connector 21A of the camera side wiring 21 and the connector 22A of the vehicle body side wiring 22 which are connected to each other are exposed to the outside, and the camera side wiring 21 and the vehicle body side wiring 22 are separated by separating these connectors 21A, 22A. Can be cut.

  As described above, according to the present embodiment, the camera-side wiring can be obtained simply by removing the second lid 27 while fixing the rear monitoring camera 20 to the recess closing plate 15 via the first lid 23. Since the connector 21A of the vehicle 21 and the connector 22A of the vehicle body side wire 22 can be disconnected, the camera side wire 21 and the vehicle body side wire 22 can be quickly and easily cut.

  In this case, the connector 21 </ b> A of the camera side wiring 21 and the connector 22 </ b> A of the vehicle body side wiring 22 are connected at the position of the wide groove portion 16 </ b> A of the notch groove 16 near the wiring fixing bracket 18. Therefore, the work for separating the connectors 21A and 22A can be performed in a large work space secured by the wide groove portion 16A, and work for cutting between the camera side wiring 21 and the vehicle body side wiring 22 is performed. It is possible to further improve the properties.

  After cutting between the camera side wiring 21 and the vehicle body side wiring 22 in this way, wire ropes (not shown) are hung on the left and right lifting brackets 11E and 11F provided on the counterweight 10. By turning and lifting the wire rope with a hydraulic crane or the like, the counterweight 10 can be easily detached from the upper swing body 3 with the rear monitoring camera 20 attached. As a result, workability when removing the counterweight 10 from the upper swing body 3 during transportation can be improved.

  Next, when the removed counterweight 10 is attached to the upper swing body 3 again, as shown in FIG. 8, the first lid body 23 to which the rear monitoring camera 20 is fixed is fixed to the recess closing plate 15. Yes. For this reason, the camera-side wiring 21 of the rear monitoring camera 20 is kept fixed to the wiring fixing bracket 18 provided in the wiring housing recess 14 by the binding band 19.

  In this state, one end side of the vehicle body side wiring 22 is extended to the counterweight 10 side and guided into the wiring receiving recess 14 through the opening end 16C of the notch groove 16 provided in the recess closing plate 15, thereby the wiring receiving recess. 14, the connector 22 </ b> A of the vehicle body side wiring 22 can be attached to the connector 21 </ b> A of the camera side wiring 21 to connect the camera side wiring 21 and the vehicle body side wiring 22.

  In this case, the connector 21 </ b> A of the camera side wiring 21 and the connector 22 </ b> A of the vehicle body side wiring 22 are connected at the position of the wide groove portion 16 </ b> A of the notch groove 16 near the wiring fixing bracket 18. The operation of connecting the vehicle body side wiring 22 can be quickly and easily performed in a large work space secured by the wide groove portion 16A, and the workability can be further enhanced.

  And after connecting between the camera side wiring 21 and the vehicle body side wiring 22, the 2nd cover body 27 is fixed to the recessed part obstruction | occlusion board 15 using the volt | bolt 28, as shown in FIG. Thereby, the notch groove 16 formed in the recessed part obstruction | occlusion board 15 by the 1st, 2nd cover bodies 23 and 27 can be covered from upper direction. As a result, the camera side wiring 21 and the vehicle body side wiring 22 housed in the wiring housing recess 14 can be shielded from the outside, and the camera side wiring 21 and the vehicle body side wiring 22 can be protected.

  Next, the excavator 1 according to the present embodiment has been devised to prevent the rear monitoring camera 20 from being stolen. Hereinafter, the antitheft structure of the rear monitoring camera 20 will be described.

  That is, in the present embodiment, the recess closing plate 15 is provided with a slit 17 extending in the front and rear directions, and a hook-like hook that engages with the slit 17 on the lower surface side of the first lid 23. A member 26 is fixedly provided.

  Here, when the first lid 23 to which the rear monitoring camera 20 is fixed is attached to the recess closing plate 15, first, the cover support frame 9 that supports the opening / closing cover 8B of the engine cover 8 is removed, and the recess A hook member 26 is inserted into and engaged with the slit 17 from the opening end 17A side of the slit 17 provided in the closing plate 15.

  Then, the first lid body 23 is moved rearward with the hook member 26 engaged with the slit 17, and the first lid body 23 is fixed to the recess closing plate 15 using a bolt 24. By attaching the cover support frame 9 to the revolving frame 5 in this state, the forward movement of the hook member 26 can be restricted by the cover support frame 9. Accordingly, the hook member 26 will not be detached from the slit 17 unless the cover support frame 9 is removed again.

  As a result, even if the second lid 27 is removed from the recess closing plate 15 and the bolts 24 for fixing the first lid 23 are removed, the hook member 26 is slit in the first lid 23. By engaging 17, the rear surveillance camera 20 can be prevented from being stolen because it cannot be removed from the recess closing plate 15 simply by moving forward and backward within the range of the slit 17.

  In this case, the wiring fixing bracket 18 provided in the wiring housing recess 14 is disposed in the vicinity of the opening end 16C of the notch groove 16, and its lower end is fixed to the bottom surface 12C1 of the wiring housing recess 14 and the upper end. Is fixed to the lower surface of the recess closing plate 15. Thereby, the periphery of the opening end 16 </ b> C of the notch groove 16 and the opening end 17 </ b> A of the slit 17 in the recess closing plate 15 can be reinforced by the wiring fixing bracket 18.

  As a result, for example, even if the first lid 23 is forcibly pulled upward from the recess closing plate 15 with the bolt 24 removed, the periphery of the slit 17 is not deformed or damaged, and Since the engagement state between the hook member 26 of the lid 23 and the slit 17 can be maintained, theft of the rear monitoring camera 20 can be reliably prevented for a long period of time.

  In the above-described embodiment, the rear monitoring camera 20 is illustrated as an electrical component attached to the counterweight 10. However, the present invention is not limited to this, for example, an illumination lamp that illuminates the back of the excavator during night work, a display lamp that displays the operating state of the excavator, a GPS antenna that transmits and receives a position information signal to the excavator, etc. It is good also as a structure which attaches another electrical component.

  Further, in the above-described embodiment, the crawler type hydraulic excavator has been described as an example of the construction machine. However, the present invention is not limited to this, and can be widely applied to other construction machines such as a wheel-type hydraulic excavator and a hydraulic crane.

1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
4 working device 10 counterweight 11 housing 11A front surface 11C upper surface 12 upper surface plate 12C central upper surface plate 12C1 bottom surface 14 wiring housing recessed portion 15 recessed portion closing plate 16 notched groove 16C opening end 17 slit 18 wiring fixing bracket 20 rear monitoring camera (electrical equipment)
21 Camera side wiring (Electrical component side wiring)
21A, 22A connector 22 vehicle body side wiring 23 first lid body 26 hook member 27 second lid body

Claims (3)

A self-propelled vehicle body, a work device provided on the front side of the vehicle body, and a block body for balancing the weight of the work device, the front face facing the rear end side of the vehicle body A counterweight provided on the rear side of the vehicle body, an electrical component attached to the counterweight for monitoring, illumination, and transmission / reception operations, and an electrical terminal having one end connected to the electrical component and the other end extending to the vehicle body side With wiring ,
The upper surface of the counterweight is provided with a wiring receiving recess in which the upper surface and the front surface are opened by recessing a part of the upper surface downward,
The counterweight is provided with a recess closing plate that closes the wiring housing recess,
The recess closing plate includes a notch groove extending in the front and rear directions at the position of the wiring housing recess and having an opening end on the front end side, and a long groove-like slit extending in the front and rear directions adjacent to the notch groove. And
A lid covering the cutout groove and the slit is detachably provided on the recess closing plate,
The electrical component is provided fixed to the lid,
In the construction machine, on the lower surface side of the lid body, provided with a hook member that prevents the lid body from separating upward and downward from the recess closing plate by engaging with the slit ,
Before SL electrostatic sign line, one end connected the the electrical equipment side wiring connected to the other end to the electrical component is derived on the wiring accommodating recess, one end via a connector on the other end of the electrical component side wire The other end side is constituted by the vehicle body side wiring extending from the counterweight to the vehicle body side,
In the wiring housing recess, a wiring fixing bracket for fixing the electrical component side wiring is provided ,
The wiring fixing bracket is disposed between the bottom surface of the wiring receiving recess and the recess closing plate located in the vicinity of the opening end of the notch groove,
And the wiring fixing bracket, a construction machine is characterized in that a configuration you respectively fixed to the bottom surface of the wiring housing recess in said recess closure plate. The construction machine according to claim 1, wherein the wiring fixing bracket is configured to be disposed at a portion sandwiched between the notch groove and the slit . The said cover body is comprised by the 1st cover body to which the said electrical component is fixed, and the 2nd cover body arrange | positioned adjacent to this 1st cover body and covering the said wiring fixing bracket. The construction machine according to 1 or 2 .

Images