JP6411974B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine such as a hydraulic excavator provided with, for example, a hydraulic hose that supplies pressure oil to a hydraulic actuator and a harness that supplies electric power to an electrical device.

  Generally, a construction machine such as a hydraulic excavator includes a lower traveling body, an upper revolving body that has a revolving frame that forms a support structure, and is pivotably mounted on the lower traveling body, and a front side of the revolving frame of the upper revolving body And a working device driven by a hydraulic actuator (see, for example, Patent Documents 1 and 2).

JP 2002-221974 A JP 2002-322673 A

  Here, the construction machine described in Patent Document 1 is provided with a hydraulic hose connected to the cassette tank and a harness connected to the fuel gauge by measuring the fuel level in the cassette tank. In addition, the construction machine described in Patent Document 2 includes a hydraulic hose (hydraulic conduit) connected to a control valve device (control valve) and a harness (signal cable) connected to an operation panel disposed in the operation room. ) And are provided. In this case, the hydraulic hoses and harnesses in Patent Documents 1 and 2 are normally held on the swing frame of the upper swing body using separate holding members.

  However, in the prior art described in Patent Documents 1 and 2, since the hydraulic hose and the harness are separately held in a limited narrow space, when the hydraulic hose and the harness are assembled to the turning frame or the like, There is a problem that the number of processes increases and workability deteriorates. Moreover, when holding | maintaining a hydraulic hose and a harness using a separate holding member, there exists a possibility that a hydraulic hose and a harness may contact and be damaged.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to keep the assembly position of the hydraulic hose and harness with respect to the swing frame constant, and easily connect the hydraulic hose and harness to the swing frame. The object is to provide a construction machine which can be assembled.

In order to solve the above-described problems, the present invention includes a lower traveling body, an upper revolving body that has a revolving frame that forms a support structure and is turnably mounted on the lower traveling body, and a revolving frame of the upper revolving body. The swivel frame is installed on the front side of the base plate and is driven by a hydraulic actuator. The swivel frame extends in the front and rear directions on the bottom plate, and the work unit is attached to the front side. Left and right vertical plates and a front plate located on the front side of the left and right vertical plates and fixed between the left and right vertical plates, and the swivel frame includes the work A hydraulic hose that supplies pressure oil to the hydraulic actuator of the device, and a harness that is attached to the working device for supplying electric power to an electrical device attached to the hydraulic actuator are disposed, and the front plate includes: Hydraulic pressure A hose insertion hole that leads the hose toward the hydraulic actuator from the rear side of the front plate to the front side, and a harness insertion hole that leads the harness toward the electric device from the rear side of the front plate to the front side In a construction machine in which a holding member for holding the hydraulic hose and the harness is provided on the front surface of the front plate, the holding member is led out to the front side of the front plate through the hose insertion hole. A hose holding portion that holds the hydraulic hose and a harness holding portion that holds the harness led out to the front side of the front plate through the harness insertion hole, and the holding member includes the hose holding portion. and provided fixing portions for fixing the holding member in different positions on the front plate and the harness holding portion, the fixing portion of the holding member is fixed to the front plate using fasteners The harness holding portion and the fixing portion of the holding member are a single plate body in which a harness holding hole for holding the harness and a fastener insertion hole through which the fastener is inserted are formed. The hose holding portion of the holding member is formed by fixing a U-shaped rod-like body that sandwiches the hydraulic hose from the radial direction to the plate body .

  According to the present invention, the holding member in which the hose holding portion and the harness holding portion are integrally formed is attached to the front plate of the turning frame, and the hydraulic hose and the harness are held by the holding member, thereby the hydraulic hose for the turning frame. And the assembly position of the harness can be kept constant. Moreover, workability | operativity when attaching a hydraulic hose and a harness to a turning frame can be improved.

1 is a left side view showing a hydraulic excavator according to an embodiment of the present invention. It is a top view which shows the turning frame of the hydraulic shovel in FIG. It is a top view which shows the state which attached the hydraulic hose, the harness, the engine, the hydraulic pump, the control valve apparatus, etc. to the turning frame. It is a front view which shows the left vertical board, right vertical board, front board, etc. of a turning frame. It is a front view which shows the holding member, hydraulic hose, harness etc. which were provided in the front board of the hydraulic shovel. It is sectional drawing which looked at a turning frame, a hydraulic hose, a harness, a holding member, etc. from the arrow VI-VI direction in FIG. It is sectional drawing which expands and shows the holding member etc. in FIG. FIG. 3 is a partially broken perspective view of the left and right vertical plates, the front plate, the boom cylinder mounting bracket, the holding member, and the like when viewed from the right front side of the hydraulic excavator. It is a front view which shows a holding member alone. It is a perspective view which shows a holding member alone. It is a hydraulic circuit diagram including a boom cylinder, a hydraulic hose, a harness, a controller, a sensor, and the like.

  Hereinafter, as an embodiment of the construction machine according to the present invention, a hydraulic excavator provided with a crawler-type lower traveling body will be described as an example, and will be described in detail with reference to FIGS.

  In FIG. 1, a hydraulic excavator 1 as a representative example of a construction machine includes a self-propelled crawler-type lower traveling body 2 and an upper swing that is mounted on the lower traveling body 2 via a swivel wheel 2A so as to be capable of swiveling. The body 3 and the working device 4 provided on the front side of the upper swing body 3 are configured. Here, the hydraulic excavator 1 is a small hydraulic excavator (mini excavator) used in a narrow work site such as an urban area. When the upper swing body 3 rotates on the lower traveling body 2, a counterweight 14 described later is provided. The rear surface is configured to fit within the vehicle width of the lower traveling body 2.

  As shown in FIGS. 1 to 3, the upper swing body 3 includes a swing frame 5, a counterweight 14, an engine 15, a hydraulic pump 16, a control valve device 18, a driver seat 19, a canopy 20, and the like which will be described later. .

  The working device 4 is an offset boom type working device that is preferably used for the side ditching work, and is provided on the front side of the swivel frame 5 that constitutes the upper swivel body 3 so as to be able to move up and down, and performs soil excavation work and the like. It is. The working device 4 includes a lower boom 4A attached to the front side portions of left and right vertical plates 7 and 8, which will be described later, and an upper boom 4B attached to the front end of the lower boom 4A so as to be able to move up and down. An arm stay 4C attached to the tip of the upper boom 4B so as to be swingable left and right, an arm 4D attached to the arm stay 4C so as to be able to move up and down, and attached to the tip of the arm 4D so as to be rotatable. A bucket cylinder 4E, a link rod 4F provided between the lower boom 4A and the arm stay 4C, and a boom cylinder 4G, an offset cylinder 4H, an arm cylinder 4I, and a bucket cylinder 4J as hydraulic actuators for driving them. It is comprised by the hook 4K for a suspended load work.

  The revolving frame 5 is located below the upper revolving structure 3 and constitutes a support structure for the upper revolving structure 3. As shown in FIG. 2, the revolving frame 5 is provided with a flat bottom plate 6 and standing on the bottom plate 6. The work frame 4 is attached to the front side and extends forward and rearward at a predetermined interval in the left and right directions. The left vertical plate 7, the right vertical plate 8, the front plate 9 connecting the left and right vertical plates 7, 8 in the left and right directions, and the bottom plate 6 and the left vertical plate 7 are projected to the left. A plurality of left overhanging beams 10A, arcuate left side frames 11 joined to the front ends of the left overhanging beams 10A and extending in the front and rear directions on the left side of the bottom plate 6, and the right side from the bottom plate 6 and the right vertical plate 8 A plurality of right extending beams 10B projecting to each other, an arcuate right side frame 12 joined to the tip of each right projecting beam 10B and extending forward and rearward on the right side of the bottom plate 6, and left and right vertical plates 7 and 8 are arranged at the rear ends of the base plate 6 and extend horizontally and horizontally to the left and right. It is largely constituted. Here, in the small hydraulic excavator 1, in order to keep the turning radius of the upper turning body 3 small, the turning frame 5 is formed in a small circular shape as a whole, and the mounted equipment is arranged on the turning frame 5. Space is also getting smaller.

  The left vertical plate 7 stands substantially vertically on the bottom plate 6 and extends in the front and rear directions. The right vertical plate 8 is erected substantially vertically on the bottom plate 6 and extends forward and rearward with a constant left and right spacing formed between the left vertical plate 7 and the left vertical plate 7.

  Here, as shown in FIG. 2 and FIG. 6, the left and right vertical plates 7 and 8 have a mountain shape with the front and rear center portions protruding upward, and the vicinity of the top portion thereof is a boom mounting portion 7A. 8A. And the foot part 4A1 of the lower boom 4A constituting the work device 4 is pin-coupled to the boom attachment part 7A of the left vertical plate 7 and the boom attachment part 8A of the right vertical plate 8 so as to be able to move up and down.

  The front plate 9 is positioned on the front side of the bottom plate 6 and is fixed between the left and right vertical plates 7 and 8 to reinforce the vertical plates 7 and 8. As shown in FIGS. 2 to 7, the front plate 9 is formed by bending a plate material such as a steel plate, for example, and is inclined obliquely downward toward the front side of the swivel frame 5 as a whole. The front end edge of the front plate 9 is joined to the upper surface of the bottom plate 6 using welding means, and the rear end edge of the front plate 9 is joined to the horizontal partition plate 13. Further, the left edge of the front plate 9 is joined to the inner wall surface of the left vertical plate 7, and the right edge of the front plate 9 is joined to the inner wall surface of the right vertical plate 8 using welding means.

  On the front surface 9A of the front plate 9, an insertion hole 9B is provided between the right vertical plate 8 and the boom cylinder mounting bracket 9C. The insertion hole 9B is formed of a substantially elliptical through hole that passes through the front surface 9A of the front plate 9 in the front and rear directions and extends downward, and hydraulic hoses 23A and 23B and a harness 30 described later are inserted therethrough. Is. That is, the insertion hole 9B includes a hose insertion hole that leads the hydraulic hoses 23A and 23B toward the boom cylinder 4G from the rear side to the front side of the front plate 9, and the harness 30 toward the pressure sensors 27A and 27B described later. The harness insertion hole led out from the rear side to the front side of the plate 9 is configured.

  In addition, a pair of boom cylinder mounting brackets 9 </ b> C are disposed on the front surface 9 </ b> A of the front plate 9 at an intermediate portion in the left and right directions. The pair of boom cylinder mounting brackets 9 </ b> C are fixed to the upper surface of the bottom plate 6 and the front side of the front plate 9 using welding means at a constant interval in the left and right directions. And the bottom side of the boom cylinder 4G which comprises the working apparatus 4 is pin-coupled so that rotation is possible at the boom cylinder attachment bracket 9C.

  The counterweight 14 is attached to the rear end portions of the left and right vertical plates 7 and 8 constituting the revolving frame 5, and balances the weight with the work device 4. The rear surface side of the counterweight 14 is formed in an arc shape so that the turning radius of the upper turning body 3 is small.

  The engine 15 is located on the front side of the counterweight 14 and is provided on the rear side of the turning frame 5. The engine 15 is mounted on the turning frame 5 in a horizontally placed state in which a crankshaft (not shown) extends leftward and rightward. The engine 15 is configured using, for example, a diesel engine (internal combustion engine), and constitutes a drive source that rotationally drives the hydraulic pump 16.

  The hydraulic pump 16 is attached to the left end side of the engine 15 and is driven to rotate by the engine 15. The hydraulic pump 16 constitutes a hydraulic pressure source together with the hydraulic oil tank 17. The hydraulic pump 16 is configured by, for example, a variable displacement swash plate type, a swash shaft type, or a radial piston type hydraulic pump. Here, the hydraulic pump 16 discharges the oil as high pressure oil while sucking the oil from the hydraulic oil tank 17. The pressure oil discharged from the hydraulic pump 16 is supplied to various hydraulic actuators (for example, the boom cylinder 4G, the offset cylinder 4H, the arm cylinder 4I, the bucket cylinder 4J, etc.) via the control valve device 18.

  As shown in FIG. 3, the control valve device 18 is disposed on the left front side of the turning frame 5. The control valve device 18 is formed in a block shape having a rectangular parallelepiped shape as a whole by an assembly of a plurality of directional control valves including a directional control valve 22 to be described later, and is formed on the bottom plate 6 of the revolving frame 5 and each left extending beam 10A. It is attached to the provided mounting plate 18A.

  Here, the control valve device 18 controls the direction of the pressure oil discharged from the hydraulic pump 16 in accordance with the operation of the operation lever 21 described later. As a result, the left and right traveling motors (not shown) of the lower traveling body 2, the cylinders 4G, 4H, 4I, 4J of the working device 4, the turning motor (not shown) and the like from the hydraulic pump 16. Pressure oil is selectively supplied and discharged, and each of these hydraulic actuators can be operated according to the operation of the operator.

  The driver's seat 19 is disposed above the engine 15 via a support member (not shown), and is seated by an operator. The upper side of the driver seat 19 is covered with a canopy 20. On both the left and right sides of the driver's seat 19, left and right operation levers 21 (only the left side are shown) operated by an operator are arranged.

  Next, a hydraulic circuit for supplying and discharging pressure oil to and from the boom cylinder 4G that constitutes the hydraulic actuator of the work device 4 will be described with reference to FIG.

  The direction control valve 22 constitutes a part of the control valve device 18 and is provided on the turning frame 5. The direction control valve 22 is connected to the rod side oil chamber 4G1 of the boom cylinder 4G via a hydraulic hose 23A, and is connected to the bottom side oil chamber 4G2 of the boom cylinder 4G via a hydraulic hose 23B. An output port of the pilot operation valve 24 is connected to the hydraulic pilot portion of the direction control valve 22, and pilot pressure from the pilot pump 25 is supplied according to the operation direction and operation amount of the operation lever 21. Thereby, the direction control valve 22 switches and controls the direction of the pressure oil supplied to and discharged from the boom cylinder 4G according to the operation on the operation lever 21.

  The holding valve 26 is located on the bottom side of the boom cylinder 4G, and is provided in the middle of the hydraulic hose 23B that connects the direction control valve 22 and the bottom side oil chamber 4G2 of the boom cylinder 4G. This holding valve 26 receives a load pressure from the boom cylinder 4G and shuts off the direction control valve 22 and the bottom side oil chamber 4G2 of the boom cylinder 4G, and the pilot operation check valve. A pilot-type switching valve 26B that switches between supply and stop of load pressure to the valve 26A is configured. The holding valve 26 prevents the rod of the boom cylinder 4G from moving to the contraction side due to breakage of the hydraulic hose 23B or the like during suspension work using the hook 4K of the work device 4, and prevents the suspension load from dropping. To do.

  The boom cylinder 4G is provided with a pressure sensor 27A for measuring the pressure in the rod-side oil chamber 4G1 and a pressure sensor 27B for measuring the pressure in the bottom-side oil chamber 4G2. These pressure sensors 27A and 27B are hydraulic actuators. It constitutes the electrical equipment attached to the. These pressure sensors 27A and 27B measure information related to the boom cylinder 4G during the lifting operation, for example, pressures in the rod-side oil chamber 4G1 and the bottom-side oil chamber 4G2, and output the information to the controller 28.

  The controller 28 is provided, for example, in the canopy 20 of the upper swing body 3, and the controller 28 includes a microcomputer. Connected to the input side of the controller 28 is an ML crane switch 29 that is turned ON when carrying out the lifting work using the hook 4K of the working device 4, and pressure sensors 27A and 27B provided on the boom cylinder 4G. Are connected via a harness 30 described later. On the other hand, a warning device 31 is connected to the output side of the controller 28.

  Here, the ML crane represents an operation characteristic of performing a lifting work while operating a so-called moment limiter. For example, when an operator performs an operation of lifting a heavy object using the hook 4K or the like, when the operator turns on the ML crane switch 29, a display lamp (not shown) in the vicinity of the ML crane switch 29 is turned on. Signals that the function is active. In this case, the controller 28 calculates the load or the like of the suspended load based on the pressure in the oil chambers 4G1 and 4G2 of the boom cylinder 4G detected by the pressure sensors 27A and 27B, and if the suspended load is overloaded, Then, a command to send a warning signal to the warning device 31 is output.

  Next, hydraulic hoses 23A and 23B that connect between the boom cylinder 4G and the direction control valve 22 of the work device 4, and harnesses that connect between the pressure sensors 27A and 27B provided on the boom cylinder 4G and the controller 28. 30 will be described.

  The hydraulic hose 23A connects between the rod side oil chamber 4G1 of the boom cylinder 4G and the direction control valve 22, and the hydraulic hose 23B connects between the bottom side oil chamber 4G2 of the boom cylinder 4G and the direction control valve 22. doing. These two hydraulic hoses 23A and 23B are constituted by flexible pressure-resistant rubber hoses, and are arranged on the revolving frame 5 with slack in order to allow the boom cylinder 4G to move up and down with respect to the revolving frame 5. Has been. Here, the distal end side of each hydraulic hose 23A, 23B, the proximal end of which is connected to the directional control valve 22, passes from the lower side of the left vertical plate 7 to the lower side of the front plate 9, and passes through the insertion hole 9B of the front plate 9. It passes through to the front side (outside) of the front plate 9. And the front end side of each hydraulic hose 23A, 23B is each connected to the rod side oil chamber 4G1 and bottom side oil chamber 4G2 of the boom cylinder 4G via the holding member 32 mentioned later.

  The harness 30 includes a harness 30A for connecting the pressure sensor 27A attached to the boom cylinder 4G and the controller 28, and a harness 30B for connecting the pressure sensor 27B attached to the boom cylinder 4G and the controller 28. It is formed by binding to one (see FIG. 11). The harness 30 is disposed on the revolving frame 5 in a slack state in order to allow the boom cylinder 4G to move up and down with respect to the revolving frame 5. Here, the distal end side of each harness 30 to which the proximal end side is connected to the controller 28 passes through the lower side of the front plate 9 and is led out to the front side (outside) of the front plate 9 through the insertion hole 9B of the front plate 9. The And the front end side of the harness 30 is connected to the pressure sensors 27A and 27B attached to the boom cylinder 4G via the holding member 32, respectively.

  Next, the holding member 32 that holds the hydraulic hoses 23A and 23B and the harness 30 on the front surface 9A side of the front plate 9 will be described.

  The holding member 32 is located on the front surface 9A of the front plate 9 and is provided between the right vertical plate 8 and the right boom cylinder mounting bracket 9C. The holding member 32 includes a hose holding portion 33 formed by bending a rod-like body into a substantially U shape, and a plate body 34 that integrally forms a harness holding portion 35 and a fixing portion 36. That is, the holding member 32 integrally forms the hose holding part 33, the harness holding part 35, and the fixing part 36. The holding member 32 holds the hydraulic hoses 23A and 23B and the harness 30 which are led out to the front surface 9A side of the front plate 9 through the insertion hole 9B. In the holding member 32, the hose holding portion 33 and the harness holding portion 35 are arranged at positions corresponding to the insertion holes 9B by fixing the fixing portion 36 to the front surface 9A.

  The hose holding portion 33 is provided on the distal end side (upper side) of the holding member 32. The hose holding portion 33 is formed in a substantially U shape by bending a single rod-like body, and the base end side is fixed to the upper end of the plate body 34 by means such as welding. In this case, the hose holding part 33 faces the insertion hole 9B substantially in the front and rear directions. As a result, the hose holding part 33 holds the two hydraulic hoses 23A and 23B led out from the insertion hole 9B from the radial direction and holds the two hydraulic hoses 23A and 23B in parallel in the upward and downward directions. doing.

  The plate body 34 is located on the base end side (lower side) of the holding member 32 and is fixed to the front surface 9 </ b> A of the front plate 9. The plate body 34 includes a harness holding portion 35 that holds the harness 30, a fixing portion 36 that fixes the holding member 32 to the front plate 9, and a step portion 37 that is provided between the harness holding portion 35 and the fixing portion 36. It is comprised including. The plate body 34 is formed by using a single sheet having a substantially rectangular shape in which the width dimension (left and right dimension) on the upper side (harness holding part 35 side) is larger than the width dimension on the lower side (fixed part 36 side). The harness holding part 35 and the fixing part 36 are integrally formed. Here, a concave groove 34 </ b> A for fixing the hose holding portion 33 is provided at the tip of the plate body 34.

  The harness holding part 35 is located between the hose holding part 33 and the stepped part 37 of the plate body 34 and is provided so as to face the insertion hole 9B in the front and rear directions. The harness holding part 35 includes a harness holding hole 35A located substantially at the center of the harness holding part 35 and a notch 35B cut out from one end of the harness holding part 35 in the left and right directions to the harness holding hole 35A. It is configured. The harness holding hole 35A is formed as a substantially circular through hole penetrating the plate 34 in the front and rear directions, and holds the harness 30 led out from the insertion hole 9B. In this case, the harness 30 inserted through the harness holding hole 35A is supported by the bush 35C (see FIGS. 7 and 8). The notch 35B is for incorporating the bush 35C for supporting the harness 30 into the harness holding hole 35A from the outside in the radial direction of the harness holding hole 35A.

  The fixing portion 36 is provided on the proximal end side (lower side) of the holding member 32. In the fixing portion 36, two substantially rectangular fastener insertion holes 36A penetrating the plate 34 in the front and rear directions are formed in the upper and lower directions. The fastener insertion hole 36A is for inserting and screwing a bolt 36B as a fastener when the fixing portion 36 is fixed to the front surface 9A of the front plate 9. In other words, the fixing portion 36 fixes the holding member 32 to the front plate 9 at a position different from the hose holding portion 33 and the harness holding portion 35 by being fixed to the front plate 9 using the bolt 36B. Thereby, the fixing | fixed part 36 each arrange | positions the hose holding | maintenance part 33 and the harness holding | maintenance part 35 in the position which opposes the insertion hole 9B in the front and back direction, respectively.

  The step portion 37 is provided between the harness holding portion 35 and the fixing portion 36. The step portion 37 is formed by bending the plate body 34 from the upper side to the front side of the fixed portion 36. That is, the step portion 37 is configured to arrange the hose holding portion 33 and the harness holding portion 35 above the step portion 37 in front of the fixing portion 36 below the step portion 37. In this case, when the fixing portion 36 is fixed to the front plate 9, a gap S is formed between the hose holding portion 33 and the harness holding portion 35 and the front plate 9 (insertion hole 9B) (see FIG. 7). ). The gap S forms a space in which the bush 35C for supporting the harness 30 is disposed.

  The hydraulic excavator 1 as a construction machine according to the present embodiment has the above-described configuration. Next, the operation of the hydraulic excavator 1 will be described.

  First, when the engine 15 of the excavator 1 is operated, pressure oil is supplied from the hydraulic pump 16 to the control valve device 18, and the control valve device 18 is mounted on the excavator 1 according to the operation of the operation lever 21. Pressure oil is selectively supplied to and discharged from the hydraulic actuator. For example, the offset cylinder 4H is expanded and contracted, and the upper boom 4B and the arm stay 4C are swung in the left and right directions on the front end side of the lower boom 4A, whereby the arm 4D is translated in the left and right directions with respect to the lower boom 4A. In this state, the arm cylinder 4I is expanded and contracted to rotate the arm 4D upward and downward with respect to the arm stay 4C, and the bucket cylinder 4J is expanded and contracted to raise the bucket 4E relative to the arm 4D. , Rotate downward. Thereby, work, such as excavation of earth and sand, can be performed with the bucket 4E.

  Here, when working the hydraulic excavator 1 in a narrow work site, as shown in FIG. 1, the lower boom 4 </ b> A is lifted up to the rear, and the arm 4 </ b> D is rotated downward so that the working device 4 is moved. The swirl radius of the upper swing body 3 is set within the swing radius. In such a case, as shown in FIG. 6, the hydraulic hoses 23 </ b> A and 23 </ b> B and the harness 30 are bent and deformed between the left and right vertical plates 7 and 8.

  At this time, the hydraulic hoses 23A and 23B led out from the control valve device 18 to the front side of the front plate 9 through the insertion hole 9B are in a state in which the intermediate portions are held by the hose holding portion 33 of the holding member 32, It is guided to the rod side oil chamber 4G1 and the bottom side oil chamber 4G2 of the cylinder 4G. On the other hand, the harness 30 led out from the controller 28 to the front side of the front plate 9 through the insertion hole 9B is attached to the boom cylinder 4G in a state in which the intermediate portion is held by the harness holding portion 35 of the holding member 32. Guided to pressure sensors 27A and 27B, respectively. In this way, the middle part of each hydraulic hose 23A, 23B led out to the front side of the front plate 9 through the insertion hole 9B and the middle part of the harness 30 are held by the holding member 32 in a state of maintaining a constant interval. Yes. As a result, in the small excavator 1, even when the space on the revolving frame 5 is narrow, the contact between the hydraulic hoses 23A and 23B and the harness 30 can be suppressed.

  Thus, according to the present embodiment, the holding member 32 is provided on the front surface 9A of the front plate 9, and the hydraulic hoses 23A and 23B and the harness 30 led out from the insertion hole 9B of the front plate 9 by the holding member 32 to the front side. Holding. In this case, the holding member 32 integrally forms the hose holding part 33 and the harness holding part 35, and is a fixing for fixing the holding member 32 to the front plate 9 at a position different from the hose holding part 33 and the harness holding part 35. The part 36 is provided. Accordingly, the hydraulic hoses 23A and 23B are held by the hose holding portion 33, and the harness 30 is held by the harness holding portion 35, whereby the hydraulic hoses 23A and 23B and the harness 30 are held by the holding member 32 that is an integral member. Can hold. As a result, even when the trajectory between the hydraulic hoses 23A and 23B and the harness 30 changes due to the lifting and lowering of the boom cylinder 4G, the distance between the hydraulic hoses 23A and 23B and the harness 30 can be kept constant. , 23B and the harness 30 can be suppressed. Moreover, since each hydraulic hose 23A, 23B and harness 30 can be held close together using one holding member 32, the hydraulic hoses 23A, 23B and harness 30 can be held in a limited space on the swivel frame 5. However, it can arrange | position easily and can improve workability | operativity when assembling | attaching hydraulic hose 23A, 23B and the harness 30 with respect to the turning frame 5. FIG.

  Here, in the hydraulic excavator of the prior art, since the hydraulic hose and the harness are separately held using separate holding members, the lengths of the hydraulic hose and the harness are different, so an extra length is formed in the harness. When the hydraulic hose and the harness are bundled together, it is necessary to prevent the positional relationship between them from shifting. On the other hand, in the present embodiment, the hydraulic hoses 23A and 23B and the harness 30 can be held together by the holding member 32 in which the hose holding portion 33 and the harness holding portion 35 are integrally formed. There is no need to form a length, and the hydraulic hoses 23A, 23B and the harness 30 can be of the same length. As a result, even when the hydraulic hoses 23A and 23B and the harness 30 are bundled together, it is possible to prevent the positional relationship between them from deviating.

  Further, according to the present embodiment, the holding member 32 is provided between the right vertical plate 8 and the boom cylinder mounting bracket 9C and provided on the front surface 9A of the front plate 9. Thereby, the hydraulic hoses 23A, 23B and the harness 30 led out from the insertion hole 9B provided on the front surface 9A of the front plate 9 can be held by the holding member 32 provided on the front surface 9A of the front plate 9.

  Moreover, according to this Embodiment, the harness holding part 35 and the fixing | fixed part 36 of the holding member 32 are formed using the one board 34, and the hose holding part 33 of the holding member 32 is U-shaped rod-shaped. It was set as the structure formed with a body. Thereby, the holding member 32 in which the hose holding portion 33 and the harness holding portion 35 are integrated can be formed by fixing the hose holding portion 33 to the plate body 34. As a result, by fixing the holding member 32 to the front plate 9, the hose holding portion 33 and the harness holding portion 35 can be easily provided for the revolving frame 5 with a small space, and the hydraulic hose 23 </ b> A for the revolving frame 5. , 23B and the harness 30 can be efficiently assembled.

  Further, according to the present embodiment, the step portion 37 is provided between the harness holding portion 35 and the fixing portion 36, and the gap S is provided between the insertion hole 9 </ b> B, the hose holding portion 33, and the harness holding portion 35. It was set as the structure to ensure. In this case, since the stepped portion 37 is formed by bending the plate body 34, the gap S can be easily formed. As a result, the bush 35 </ b> C that holds the harness 30 can be easily disposed in the gap S between the insertion hole 9 </ b> B, the hose holding portion 33, and the harness holding portion 35.

  Further, according to the present embodiment, the revolving frame 5 is provided with the controller 28 that outputs a signal necessary for the work when the work device 4 is used to perform the hanging work, and the boom cylinder 4G relates to the boom cylinder 4G. Pressure sensors 27A and 27B for measuring information are provided, and the controller 28 and the pressure sensors 27A and 27B are connected by a harness 30. Thereby, the information regarding the boom cylinder 4 </ b> G measured by the pressure sensors 27 </ b> A and 27 </ b> B during the hanging work can be transmitted to the controller 28 via the harness 30.

  In this embodiment, the front plate 9 has a front surface 9A provided with one insertion hole 9B through which the hydraulic hoses 23A and 23B and the harness 30 are inserted. However, the present invention is not limited to this, and for example, an insertion hole for inserting a hydraulic hose and an insertion hole for inserting a harness may be provided separately.

  In the present embodiment, the boom cylinder 4G is provided with the pressure sensor 27A for measuring the pressure in the rod-side oil chamber 4G1 and the pressure sensor 27B for measuring the pressure in the bottom-side oil chamber 4G2. However, the present invention is not limited to this. For example, the sensor may be a rotation angle sensor that measures the rotation angle of the boom cylinder, or may be a stroke sensor that measures the stroke amount of the boom cylinder.

  In the present embodiment, the excavator 1 having the crawler type lower traveling body 2 is exemplified as the construction machine. However, the present invention is not limited thereto, and for example, the wheel type hydraulic excavator having the wheel type lower traveling body. It can also be applied to.

1 Excavator (construction machine)
2 Lower traveling body 3 Upper revolving body 4 Working device 4A Lower boom (boom)
4G boom cylinder (hydraulic actuator)
4H offset cylinder (hydraulic actuator)
4I Arm cylinder (hydraulic actuator)
4J Bucket cylinder (hydraulic actuator)
5 Rotating frame 6 Bottom plate 7 Left vertical plate 8 Right vertical plate 9 Front plate 9A Front surface 9B Insertion hole 9C Boom cylinder mounting bracket (cylinder mounting bracket)
15 engine (motor)
16 Hydraulic pump 18 Control valve device 23A, 23B Hydraulic hose 27A, 27B Pressure sensor (electrical equipment)
28 controller 30A, 30B harness 32 holding member 33 hose holding part 34 plate 35 harness holding part 35A harness holding hole 36 fixing part 36A fastener insertion hole 36B bolt (fastener)
37 steps

Claims (4)

A lower traveling body, an upper revolving body having a revolving frame forming a support structure and mounted on the lower traveling body so as to be able to swivel; Consisting of a driven working device,
The swivel frame is located on the front side of the bottom plate, the left and right vertical plates that are erected on the bottom plate so as to extend in the front and rear directions and to which the working device is attached on the front side, and the left and right vertical plates. A front plate fixed between the left and right vertical plates,
A hydraulic hose that supplies pressure oil to the hydraulic actuator of the working device and a harness attached to the working device for supplying electric power to an electrical device attached to the hydraulic actuator are disposed on the swivel frame. And
The front plate includes a hose insertion hole for leading the hydraulic hose toward the hydraulic actuator from the rear side of the front plate to the front side, and the harness toward the electric device from the rear side of the front plate to the front side. Provide a harness insertion hole leading to
In the construction machine provided with a holding member for holding the hydraulic hose and the harness on the front surface of the front plate,
The holding member includes a hose holding portion that holds the hydraulic hose led out to the front side of the front plate through the hose insertion hole, and a harness that holds the harness led to the front side of the front plate through the harness insertion hole. The holding part is integrally formed,
The holding member is provided with a fixing portion for fixing the holding member to the front plate at a position different from the hose holding portion and the harness holding portion .
The fixing portion of the holding member is configured to be fixed to the front plate using a fastener,
The harness holding portion and the fixing portion of the holding member are formed using a single plate body in which a harness holding hole for holding the harness and a fastener insertion hole through which the fastener is inserted are formed. ,
The construction machine according to claim 1, wherein the hose holding portion of the holding member is configured by fixing a U-shaped rod-like body sandwiching the hydraulic hose from a radial direction to the plate body . The working device has a boom attached to the front side of the left and right vertical plates so as to be able to move up and down,
The hydraulic actuator has a boom cylinder for driving the boom,
Provided on the front surface of the front plate is a cylinder mounting bracket to which the boom cylinder is mounted at an intermediate portion in the left and right directions;
2. The construction machine according to claim 1, wherein the holding member is disposed between one of the left and right vertical plates and the cylinder mounting bracket and provided on a front surface of the front plate. Between the harness holding part and the fixing part of the plate body, a gap is provided between the harness holding part and the front plate when the fixing part is fixed to the front plate using the fastener. A step portion is formed,
The construction machine according to claim 1 , wherein a gap is secured between the hose insertion hole and the hose holding portion and between the harness insertion hole and the harness holding portion. The revolving frame includes a prime mover provided on the rear side of the revolving frame, a hydraulic pump that is driven by the prime mover and discharges pressure oil toward the hydraulic actuator, and is supplied from the hydraulic pump to the hydraulic actuator. A control valve device for controlling the direction of the pressure oil, and a controller for outputting a signal necessary for the work when the work is suspended using the work device,
The hydraulic hose connects between the control valve device and the hydraulic actuator,
The hydraulic actuator is provided with a sensor that is the electric device for measuring information related to the hydraulic actuator,
The construction machine according to claim 1, wherein the controller and the sensor are connected by the harness.

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