Construction Machinery

Abstract

This construction machine comprises: a traveling body capable of traveling in a straight line in the longitudinal direction; a soil removal device having a soil removal plate disposed in front of the traveling body; a rotating body rotatably mounted on the traveling body; a work device installed in an installation part of the rotating body; a detection device attached to the soil removal plate and detecting information related to the soil removal plate; a control device disposed on the rotating body; a first cable having one end connected to the detection device; a second cable having one end connected to the control device; a relay part disposed on the rotating body and connecting the other end of the first cable to the other end of the second cable; and a first regulation member disposed on the rotating body and regulating the movement of the first cable extending from the relay part.

Description

[Technical field]

[0001] The present invention relates to a construction machine. [Background technology]

[0002] Conventionally, construction machines equipped with soil removal devices used for ground leveling work are known. For example, a soil removal device having a blade (blade) extending in the left-right direction is provided in front of a lower traveling body of a hydraulic excavator, which is a typical example of construction machines. A technology is known in which the soil removal device mounted on the hydraulic excavator automatically controls the operation of the blade according to three-dimensional data of the ground to be worked on, thereby performing ground leveling work (see, for example, Patent Document 1).

[0003] The hydraulic excavator in Patent Document 1 includes a position / attitude detection device attached to the blade, and a controller provided on an upper rotating body rotatably mounted on a lower traveling body. The position / attitude detection device indicates the position and attitude of the blade. The controller controls the operation of the blade based on the position and attitude of the blade indicated by the position / attitude detection device.

[0004] A handrail extending left and right is provided in front of the driver's seat provided on the upper rotating body, and a relay connector is fixed to the handrail. One end of the rotating body side cable is connected to the controller, and the other end of the blade side cable is connected to the relay connector. One end of the blade side cable is connected to the position and attitude detection device, and the other end is detachably connected to the relay connector. When performing ground leveling work, the rotating body side cable and the blade side cable are connected via the relay connector, and the position and attitude detection device and the controller can be connected. On the other hand, when performing excavation work or the like using a work device provided on the upper rotating body, the blade side cable can be removed from the relay connector to avoid the upper rotating body's rotational movement being restricted by the cable. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-12255 A Summary of the Invention [Problem to be solved by the invention]

[0006] The upper rotating body may also rotate when performing ground leveling work. For example, the upper rotating body may rotate when performing ground leveling work in order to make it easier to visually check the blade from the driver's seat. In the configuration of Patent Document 1, the blade side cable extending from the relay connector to the position / attitude detection device can move freely with the rotation of the upper rotating body. For this reason, the rotation of the upper rotating body is likely to apply a load to the other end of the blade side cable connected to the relay connector. This load may, for example, damage the connector provided at the other end of the blade side cable.

[0007] The present invention aims to provide a technique capable of suppressing load from being applied to the connection points of cables due to the rotation of a rotating body. [Means for solving the problem]

[0008] An exemplary construction machine of the present invention comprises a running body capable of moving straight in the forward and backward directions, a soil removal device having a blade arranged in front of the running body, a rotating body rotatably mounted on the running body, a work device installed on an installation section of the rotating body, a detection device attached to the blade and detecting information related to the blade, a control device arranged on the rotating body, a first cable having one end connected to the detection device, a second cable having one end connected to the control device, a relay section arranged on the rotating body and connecting the other end of the first cable to the other end of the second cable, and a first regulating member arranged on the rotating body and regulating the movement of the first cable extending from the relay section. Effect of the Invention

[0009] According to the exemplary construction machine of the present invention, it is possible to suppress the load applied to the connection points of the cables due to the rotation of the rotating body. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic perspective view of a construction machine according to an embodiment of the present invention; [Diagram 2] FIG. 1 is a schematic side view of a construction machine according to an embodiment of the present invention. [Diagram 3] FIG. 1 is an enlarged schematic perspective view of a detection device and its surroundings. [Figure 4] FIG. 1 is an enlarged schematic perspective view of a relay section and its vicinity; [Diagram 5] FIG. 1 is a schematic perspective view showing a configuration of a relay unit; [Figure 6] FIG. 11 is a schematic perspective view showing a configuration of a first restricting member; [Figure 7] FIG. 11 is a schematic cross-sectional view showing a modified example of the first restricting member; [Figure 8] FIG. 13 is a schematic perspective view showing a second restricting member and its periphery disposed in the soil removal device; [Figure 9] A diagram showing the configuration shown in Figure 8 with two first cables attached. [Figure 10] FIG. 13 is a schematic perspective view showing a configuration of a tilt cylinder cover to which a second restricting member is attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the drawings. In this specification, the direction in which the traveling body 1 shown in FIG. 1 moves straight is defined as the front-rear direction, and the side on which the blade 41 of the traveling body 1 is arranged is defined as the front side. In addition, the vertical direction is defined with the rotating body 2 being up with respect to the traveling body 1. The direction perpendicular to the front-rear direction and the vertical direction is defined as the left-right direction. The side that is right when viewed from the rear toward the front is defined as the right side, and the side that is left is defined as the left side. In addition, the turning direction is expressed based on an operator sitting in the driver's seat 22 of the turning body 2, and the direction in which the operator turns clockwise is defined as a right turn, and the direction in which the operator turns counterclockwise is defined as a left turn. In addition, in this specification, a plane parallel to the vertical direction may be expressed as a vertical plane. A plane perpendicular to the vertical direction may be expressed as a horizontal plane, and a direction parallel to the horizontal plane may be expressed as a horizontal direction. Note that these directions are names used simply for explanation, and are not intended to limit the actual positional relationship and direction.

[0012] <1. Overview of construction machinery> FIG. 1 is a schematic perspective view of a construction machine 100 according to an embodiment of the present invention. FIG. 2 is a schematic side view of the construction machine 100 according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the construction machine 100 is a backhoe. Hereinafter, the construction machine of this embodiment will be referred to as the backhoe 100. However, the present invention is also applicable to construction machines other than backhoes. The present invention is widely applicable to construction machines that include a traveling body on which an earth removal device is provided, and a rotating body that is rotatably mounted on the traveling body.

[0013] As shown in FIGS. 1 and 2, the backhoe 100 includes a traveling body 1, a rotating body 2, a working device 3, and an earth removal device 4.

[0014] The running body 1 enables the backhoe 100 to move on its own. The running body 1 can move straight in the forward and backward directions. In detail, the running body 1 has a pair of left and right crawlers 1a and a traveling motor 1b that drives them. The traveling motor 1b is a hydraulic motor. The running body 1 can move straight in the forward and backward directions by the traveling motor 1b simultaneously driving the left and right crawlers 1a. The running body 1 can turn right and left by the traveling motor 1b independently driving the left and right crawlers 1a. Note that the backhoe 100 of this embodiment is a crawler type, but may be a wheel type instead of the crawler type.

[0015] The rotating body 2 is mounted on the running body 1 so as to be rotatable. The rotating body 2 has a rotating base 21 disposed between a pair of left and right crawlers 1a in a top-down plan view. The rotating base 21 is rotatably supported on the main body frame 1c of the running body 1. The rotating base 21 is driven by a rotating motor (not shown) configured as a hydraulic motor, and rotates about a central axis extending in the up-down direction. The rotating base 21 is provided so as to be capable of rotating right and left.

[0016] On the rotating body 2, there are arranged a driver's seat 22 where an operator who operates the backhoe 100 sits, and an engine (not shown) disposed inside the rotating body 2. The operator sitting in the driver's seat 22 operates various control levers and pedals provided near the driver's seat 22. The engine as a prime mover drives a hydraulic pump (not shown) that supplies pressure oil to a hydraulic actuator mounted on the backhoe. The hydraulic actuator includes various hydraulic motors and hydraulic cylinders.

[0017] The working device 3 has a boom 31, an arm 32, and a bucket 33. The working device 3 can perform excavation work of earth and sand by moving these simultaneously or independently. One end of the boom 31 is supported by a boom bracket 34, and can rotate in a vertical plane by a boom cylinder 35 that is provided so as to be extendable and retractable. One end of the arm 32 is supported by the other end of the boom 31, and can rotate in a vertical plane by an arm cylinder 36 that is provided so as to be extendable and retractable. One end of the bucket 33 is supported by the other end of the arm 32, and can rotate in a vertical plane by a bucket cylinder 37 that is provided so as to be extendable and retractable.

[0018] The working device 3 is disposed on an installation section 24 of the rotating body 2. The installation section 24 protrudes horizontally from a partial area of ​​the outer surface of the rotating body 2. The installation section 24 is located forward when viewed from the operator sitting in the driver's seat 22. Figures 1 and 2 show the rotating body 2 in a forward-disposed position where the installation section 24 faces forward. When the rotating body 2 is disposed forward, the operator sitting in the driver's seat 22 faces forward (front). Unless otherwise specified, the following explanation of directions will be made assuming that the rotating body 2 is disposed forward.

[0019] Specifically, the boom 31, the arm 32, and the bucket 33 are provided so as to be rotatable about a central axis extending in the left-right direction. The boom bracket 34 is supported by the installation section 24 so as to be rotatable about a central axis extending in the up-down direction. The boom bracket 34 is connected to a swing cylinder 25 provided on the rotating body 2 so as to be extendable in the front-rear direction, and rotates in the left-right direction by the extension and contraction of the swing cylinder 25. That is, the working device 3 can be swung in the left-right direction by operating the swing cylinder 25.

[0020] The soil removal device 4 has a blade 41 disposed in front of the traveling body 1. The blade 41 has a rectangular shape extending in the left-right direction when viewed in a plan view from the front-rear direction. The blade 41 is provided so that its position and attitude in the up-down direction can be changed. By changing the position and attitude of the blade 41 and traveling the traveling body 1, ground leveling work can be performed.

[0021] The soil removal device 4 has a lifting arm 42 supported at the front end of the main body frame 1c of the traveling body 1 so as to be swingable in the vertical direction. The lifting arm 42 can move up and down by a lift cylinder 43 arranged extendably between the main body frame 1c and the lifting arm 42. The blade 41 is supported at the front end side of the lifting arm 42 so as to be swingable. The blade 41 can be moved up and down by moving the lifting arm 42 up and down with the lift cylinder 43.

[0022] The blade 41 is attached to the lifting arm 42 so as to be rotatable about a central axis extending in a direction parallel to the extension of the lifting arm 42 (the front-rear direction in Figs. 1 and 2). The central axis is located near the center of the blade 41 in the vertical and horizontal directions when viewed from above in the front-rear direction. The rotation is made possible by a tilt cylinder 44 that is disposed on the rear side of the blade 41 and is extendable in the left-right direction. The tilt cylinder 44 allows both left-right ends of the blade 41 to swing up and down. Hereinafter, the vertical swing angle of the left-right ends of the blade 41 will be referred to as the tilt angle.

[0023] The blade 41 is attached to the lifting arm 42 so as to be rotatable about an axle pin 45 that extends in a direction perpendicular to the extension of the lifting arm 42 (the up-down direction in Figs. 1 and 2). The axle pin 45 is located behind the blade 41, near the center in the left-right direction. Rotation around the axle pin 45 is made possible by a pair of angle cylinders 46 disposed on the left and right ends of the lifting arm 42. The angle cylinders 46 allow the left and right ends of the blade 41 to swing back and forth.

[0024] <2.Detection device> The backhoe 100 configured as above includes a detection device 5 that is attached to the blade 41 and detects information related to the blade 41. The information related to the blade 41 is, in detail, position information and attitude information of the blade 41. The attitude information detected by the detection device 5 is, in detail, tilt angle information.

[0025] 3 is a schematic perspective view showing an enlarged view of the detection device 5 and its periphery. Note that Fig. 3 is a view seen from diagonally above and behind. As shown in Fig. 3, the detection device 5 includes a prism 51 and a tilt sensor 52.

[0026] The prism 51 is a target that is tracked by an automatic tracking total station (not shown) during ground leveling work using the soil removal device 4. The total station continuously measures the position information of the prism 51 and transmits the measurement results to the wireless device 6 of the backhoe 100. In this embodiment, the wireless device 6 is disposed behind the rotating body 2 as shown in Figs. 1 and 2.

[0027] 1 and 3, the blade 41 has base parts 411 on both the left and right sides of the center in the left-right direction to which the prism 51 (detection device 5) is detachably attached. In detail, the blade 41 has base parts 411 near both left and right ends to which the pillars 7 to which the prisms 51 are attached are detachably attached. The pillars 7 are disposed on one of the two base parts 411. In this embodiment, as shown in FIG. 1, the pillar 7 is disposed on the base part 411 on the left side, which is the same side as the driver's seat 22.

[0028] Each base portion 411 is disposed on the rear surface of the blade 41 and protrudes rearward. The upper surface of the base portion 411 is flat. The support pillar 7 has a flange portion 71 at its lower end. The flange portion 71 is fixed to the upper surface of the base portion 411 using bolts and nuts, thereby fixing the support pillar 7 to the base portion 411. In addition, the prism 51 is detachably attached to the upper end of the support pillar 7.

[0029] Since the prism 51 can be removed from the support 7, the prism 51 can be removed from the backhoe 100 after work is completed to prevent theft of the prism 51. Also, when automatic ground leveling work using a total station is not performed, the support 7 can be removed from the blade 41. Furthermore, since the position of the prism 51 in the left-right direction can be changed by removing the support 7, even if the total station cannot track the prism 51 at one position, the prism 51 can be tracked by replacing the prism 51 at the other position.

[0030] The tilt sensor 52 detects the tilt angle of the blade 41. The tilt angle detected by the tilt sensor 52 is transmitted by wire to the control device 8, which will be described in detail later. As shown in Fig. 1 and Fig. 3, the tilt sensor 52 is disposed behind the blade 41. In this embodiment, the tilt sensor 52 is disposed at a position slightly shifted to the left from the center of the blade 41 in the left-right direction.

[0031] In detail, the tilt sensor 52 is disposed on the upper surface of a sensor base 412 provided on the rear surface of the blade 41. The sensor base 412 is formed, for example, by welding an L-shaped member to the rear surface of the blade 41. The upper surface of the sensor base 412 is located at a position higher than the center of the blade 41 in the vertical direction, and is a flat surface having an area larger than that of the tilt sensor 52. The tilt sensor 52 is covered by a box-shaped sensor cover 521 that opens downward. A notch 521a is provided on the rear side of the sensor cover 521. A connector 91 can be connected from the rear to the tilt sensor 52 covered by the sensor cover 521 through the notch 521a. The upper part of the sensor cover 521 is covered by a tilt cylinder cover 441 that covers the tilt cylinder 44.

[0032] Sensor base 412, sensor cover 521, and tilt cylinder cover 441 can prevent soil from creeping up from below tilt sensor 52 and soil from falling from above. This makes it possible to appropriately protect tilt sensor 52 from soil during ground leveling work. Note that sensor cover 521 and tilt cylinder cover 441 are omitted in Figs. 1 and 2.

[0033] In this embodiment, the prism 51 is used as a detection device for detecting the position information of the blade 41, but this is merely an example. For example, a GNSS (Global Navigation Satellite System) antenna may be attached to the support 7 instead of the prism 51. In this case, the position information detected by the GNSS antenna may be transmitted to the control device 8 by wire.

[0034] <3. Control device> As shown in Figs. 1 and 2, the backhoe 100 includes a control device (controller) 8 disposed on the rotating body. The control device 8 is configured using a computer having, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory). In this embodiment, the control device 8 has a display screen. The control device 8 is disposed in a position that is easily visible to an operator sitting in the driver's seat 22. The control device 8 does not need to have a display screen, and in this case, a display device may be disposed separately from the control device 8, and the control device 8 may be disposed, for example, inside the rotating body 2.

[0035] Position information of the prism 51 is input to the control device 8 from the total station via the wireless device 6. The control device 8 and the wireless device 6 are connected by wire. Note that the control device 8 may be configured to have a built-in wireless communication function so that the control device 8 and the total station perform wireless communication. In addition, tilt angle information of the blade 41 is input to the control device 8 from the tilt sensor 52 by wire.

[0036] The control device 8 determines the position and attitude of the blade 41 based on the position information of the prism 51 and the tilt angle information of the blade 41. The control device 8 controls the operation of each cylinder 43, 44, 46 of the blade 41 based on the difference between the determined position and attitude of the blade 41 and three-dimensional design data prepared in advance, and causes the backhoe 100 to perform automatic ground leveling work.

[0037] In addition, multiple backhoes 100 may simultaneously perform automatic ground leveling work at one construction site. Even in such a case, it is necessary to configure the system so that the position information of the blade 41 is not input erroneously. For this reason, each backhoe 100 operates in combination with a specific total station. In each backhoe 100, an authentication signal is transmitted and received between the control device 8 and the prism 51, and based on this, the control device 8 receives position information only from the specific total station that is paired with the prism 51 connected to the backhoe 100 itself. That is, in the backhoe 100 performing automatic ground leveling work, the control device 8 and the prism 51 are connected by wire.

[0038] <4. Details of connection between the detector and the controller> As shown in Fig. 2, the backhoe 100 includes a first cable 9, a second cable 10, and a relay unit 11. One end of the first cable 9 is connected to the detection device 5. One end of the second cable 10 is connected to the control device 8. The relay unit 11 is disposed on the rotating body 2, and connects the other end of the first cable 9 to the other end of the second cable 10.

[0039] Fig. 4 is a schematic perspective view showing an enlarged view of relay unit 11 and its vicinity. Fig. 4 is a view seen from diagonally above the front. In this embodiment, detection device 5 includes two components, prism 51 and tilt sensor 52. For this reason, as shown in Fig. 4, first cable 9 connected to detection device 5 includes first cable 9A for prism and first cable 9B for tilt sensor. In addition, second cable 10 includes second cable 10A for prism and second cable 10B for tilt sensor, corresponding to first cable 9 including two types of cables 9A and 9B.

[0040] A first connector 91 is provided at both ends of each of the first cables 9A and 9B. The type of the first connector 91 may be the same or different between one end (detection device 5 side) and the other end (relay unit 11 side) of each of the first cables 9A and 9B. In this embodiment, the first connector 91 (see FIG. 4) provided at the other end has a shape that extends straight, while the first connector 91 (see FIG. 3) provided at one end has an L-shape. Note that in FIG. 3, the cable portion extending from the first connector 91 is omitted. The first connector 91 provided at one end of the first cable 9A for the prism is connected to the prism 51 at the upper end of the support 7. The first connector 91 provided at one end of the first cable 9B for the tilt sensor is connected to the tilt sensor 52 via the notch 521a of the sensor cover 521.

[0041] Further, second connectors 101 are provided at both ends of each of the second cables 10A and 10B. The type of the second connector 101 may be the same or different between one end (the control device 8 side) and the other end (the relay unit 11 side) of each of the second cables 10A and 10B. In this embodiment, the second connector 101 provided at one end is of a different type from the second connector 101 provided at the other end. A part of the part extending from the relay unit 11 of each of the second cables 10A and 10B is guided to the inside of the revolving body 2 and connected to a cable 81 (see FIG. 1) extending from the control device 8 inside the revolving body 2. Note that, in this embodiment, one end of the second cables 10A and 10B is indirectly connected to the control device 8 via the cable 81, but may be directly connected to the control device 8.

[0042] The relay unit 11 is disposed in front of the revolving body 2. The relay unit 11 is disposed in a position shifted in one direction in the left-right direction from the center of the revolving body 2 in the left-right direction. This configuration can prevent the relay unit 11 from getting in the way when the working device 3 is swung. In this embodiment, the relay unit 11 is disposed in a position shifted to the same side (left side) as the support 7 to which the prism 51 is attached. The relay unit 11 is disposed in front of the driver's seat 22. The relay unit 11 is disposed in front of the handrail 26 disposed in front of the driver's seat 22 with a gap therebetween. By disposing the relay unit 11 in front of the revolving body 2 in this way, the distance from the detection device 5 to the relay unit 11 can be shortened. This makes it easier to handle the first cable 9 and to attach and detach it.

[0043] In this embodiment, as shown in Fig. 4, an opening 27 through which a group of hoses (not shown) that supply pressure oil to the working device 3 pass is provided near the center in the left-right direction at the front of the rotating body 2. The relay unit 11 is disposed toward the front left of the rotating body 2, avoiding this opening 27.

[0044] Fig. 5 is a schematic perspective view showing the configuration of relay unit 11. As shown in Fig. 5, relay unit 11 has a support member 111 and a holding member 112. Note that, for ease of understanding, Fig. 5 also shows second connector 101 attached to relay unit 11.

[0045] The support member 111 extends upward from the upper surface of the rotating body 2 in front of the rotating body 2. More specifically, the support member 111 is disposed on the upper plate member 28 that constitutes the front upper surface of the rotating body 2. The upper surface of the upper plate member 28 extends in the horizontal direction. The support member 111 is provided on the upper plate member 28 independently from the handrail 26. The support member 111 has a base portion 111a that extends in the horizontal direction at its lower end, and the base portion 111a is fixed to the upper plate member 28. The support member 111 has a flat plate portion 111b that extends in a direction parallel to the up-down direction. The flat plate portion 111b is inclined with respect to a plane parallel to the up-down direction and the left-right direction. More specifically, the flat plate portion 111b is inclined so that the right end faces forward and the left end faces backward.

[0046] The holding member 112 is attached to the support member 111 and holds the second connector 101 provided at the other end of the second cable 10. In this embodiment, the second cable 10 includes a second cable for the prism 10A and a second cable for the tilt sensor 10B. For this reason, the holding member 112 includes a prism cable holding member 112A and a tilt sensor cable holding member 112B.

[0047] As in this configuration, by configuring the support members 111 that support the holding members 112 to be attached to the upper surface of the rotating body 2, it is possible to easily set the orientation of the holding members 112 freely. Also, by providing the support members 111 that support the holding members 112 at a position separated from the handrail 26, it is possible to make it easier for the operator to use the handrail 26.

[0048] The prism cable holding member 112A and the tilt sensor cable holding member 112B are attached to the flat plate portion 111b of the support member 111 in a vertically aligned manner. In this embodiment, the prism cable holding member 112A is above the tilt sensor cable holding member 112B, but they may be arranged upside down.

[0049] The prism cable holding member 112A and the tilt sensor cable holding member 112B have the same configuration. Each holding member 112A, 112B has two divided bodies 1121, 1122 and two bolts 1123. The two divided bodies 1121, 1122 have the same rectangular parallelepiped shape and have a groove on one surface. The two divided bodies 1121, 1122 are arranged in a direction in which the grooves face each other. A part of the second connector 101 is inserted into the grooves of the two divided bodies 1121, 1122 and is sandwiched between the two divided bodies 1121, 1122. The two divided bodies 1121, 1122 are fastened to the flat plate portion 111b of the support member 111 by the two bolts 1123 with the second connector 101 sandwiched between them.

[0050] The two divided bodies 1121, 1122 that sandwich the second connector 101 are rectangular parallelepiped shaped and inclined in a direction such that the front end is to the left and the rear end is to the right in a plan view from the top-bottom direction. The tip of the second connector 101 sandwiched between the two divided bodies 1121, 1122 opposite the side connected to the second cable 10 protrudes from the holding member 112 diagonally forward and to the right.

[0051] 4, the first connector 91 of each of the first cables 9A, 9B is attached to the tip of the second connector 101 protruding from each of the holding members 112A, 112B. In a plan view from the top-bottom direction, the first connector 91 provided at the other end of the first cable 9 is disposed at an angle with respect to the front-rear direction and extends from the relay unit 11 toward the installation unit 24.

[0052] With this configuration, it is possible to easily arrange the first cable 9, avoiding the group of hoses passing through the opening 27 arranged to the right of the relay unit 11. In addition, since the first cable 9 extends inwardly rather than outwardly from the relay unit 11, it is possible to reduce the possibility that the first cable 9 will come into contact with the crawler 1a due to the rotation of the revolving body 2. In addition, since the first cable 9 extends from the relay unit 11 at an angle relative to the front-rear and left-right directions, it is possible to reduce the possibility that the working device 3 will come into contact with the first cable 9 even when the working device 3 performs a swing operation.

[0053] In the present embodiment, the second connector 101 is held by the holding member 112, but the present invention is not limited to this. In a configuration in which the holding member 112 holds a plug, not only the first connector 91 but also the second connector 101 may be detachable from the relay unit 11. In other words, the other end of the first cable 9 and the other end of the second cable 10 may be directly connected to the relay unit 11 as in the present embodiment, or may be indirectly connected to the relay unit 11. In addition, depending on the case, in a configuration in which the second connector 101 is held by the holding member 112, the attachment positions of the first connector 91 and the second connector 101 may be reversed.

[0054] In addition, in this embodiment, the relay section 11 is configured on the front upper surface of the rotating body 2, but this is merely an example. For example, the relay section 11 may be provided on the front wall of the rotating body 2. In this embodiment, the rotating body 2 is provided so as to be able to rotate within the left-right width of the running body 1. In light of this, it is preferable that the relay section 11 is configured so as not to protrude beyond the left-right width of the running body 1 when the rotating body 2 rotates.

[0055] As can be seen from the above, the first cables 9A, 9B can be easily detached from the relay unit 11 and the detection device 5. Therefore, for example, they can be detached at the end of the day's work to prevent theft. Also, when automatic ground leveling work is not being performed, the first cables 9A, 9B can be detached to expand the rotation range of the rotating body 2.

[0056] In this embodiment, relay unit 11 is provided with connector cover 113 (see FIG. 4) that is attached to the tip of second connector 101 when first connector 91 is removed. Connector cover 113 is suspended from holding member 112 by a line material such as a wire. Connector cover 113 can prevent foreign matter such as dust and water from entering inside second connector 101.

[0057] As shown in FIG. 4, the backhoe 100 includes a first regulating member 12 disposed on the rotating body 2. The first regulating member 12 regulates the movement of the first cable 9 extending from the relay portion 11. In detail, the first regulating member 12 regulates the movement of the first cable 9 accompanying the rotation of the rotating body 2. The first regulating member 12 is provided separately from the relay portion 11 and disposed away from the relay portion 11. The first regulating member 12 also functions as a guide member that guides the first cable 9 extending from the relay portion 11 to the detection device 5.

[0058] The first restricting member 12 moves together with the revolving body 2, similar to the relay unit 11. For this reason, by providing the first restricting member 12, even when the revolving body 2 revolves, it is possible to suppress the first cable 9 from moving between the first restricting member 12 and the relay unit 11. In other words, it is possible to suppress the application of a load to the connection point of the first cable 9 (more specifically, the first connector 91 on the relay unit 11 side) due to the rotation of the revolving body 2.

[0059] In the present embodiment, as a preferred embodiment, the first restricting member 12 is disposed between the installation section 24 and the relay section 11 in the left-right direction in a plan view (front view) from the front-rear direction of the revolving body 2. With this configuration, the first restricting member 12 can be disposed at a position close to the center in the left-right direction at the front of the revolving body 2. That is, with this configuration, the starting point of twisting of the first cable 9 can be disposed close to the center in the left-right direction at the front of the revolving body 2, so that the wild movement of the first cable 9 can be suppressed when the revolving body 2 revolves to the left or right.

[0060] The installation section 24 and the relay section 11 may be at the same height position in the up-down direction, or may be shifted. In this embodiment, in a plan view from the front-rear direction, the installation section 24 and the relay section 11 are shifted in height position in the up-down direction and do not face each other in the left-right direction. In addition, the first restricting member 12 does not have to be disposed between the installation section 24 and the relay section 11 in the left-right direction, and may be disposed, for example, in front of the relay section 11 or to the left of the relay section 11. Even with such a configuration, it is possible to suppress the application of a load to the other end of the first cable 9 (the first connector 91 on the relay section 11 side).

[0061] In addition, in this embodiment, as a preferred embodiment, the first restricting member 12 is disposed below the relay unit 11. This configuration makes it easier to arrange the first cable 9 at a short distance from the relay unit 11 toward the detection device 5 disposed below the revolving body 2. Furthermore, when the first cable 9 is guided from the relay unit 11 to the first restricting member 12, it is possible to prevent excessive force from being applied to the other end of the first cable 9.

[0062] Fig. 6 is a schematic perspective view showing the configuration of the first restricting member 12. The first restricting member 12 is provided on a front plate member 29 that constitutes the front surface of the revolving body 2. As shown in Fig. 4, the front plate member 29 constitutes the front wall surface of the opening 27 through which the hose group passes. As shown in Fig. 6, in this embodiment, in response to the presence of the first cable for prism 9A and the first cable for tilt sensor 9B, the first restricting member 12 includes a first restricting member for prism cable 12A and a first restricting member for tilt sensor cable 12B.

[0063] The first restricting member 12 is L-shaped with its tip pointing upward. In other words, the first restricting member 12 is hook-shaped. By forming the first restricting member 12 in such a shape, the structure of the first restricting member 12 can be simplified and the first restricting member 12 can be easily arranged on the rotating body 2. In detail, the first restricting member 12A for the prism cable and the first restricting member 12B for the tilt sensor cable have the same L-shape. The two first restricting members 12A, 12B are attached to the front plate member 29 by welding or the like with a gap between them in the left-right direction.

[0064] The first cable 9 is hooked on the first regulating member 12. In detail, as shown in Fig. 4, the first cable for prism 9A is hooked on the first regulating member for prism cable 12A. The first cable for tilt sensor 9B is hooked on the first regulating member for tilt sensor cable 12B. With this configuration, the first cables 9A, 9B can be easily attached to and detached from the first regulating members 12A, 12B.

[0065] In this embodiment, in order to easily attach and detach the first cable 9 to the L-shaped first restricting member 12, a part of the first cable 9 is spirally shaped, and the spiral part is hooked on the first restricting member 12. That is, the first cable 9 has a spiral part that is hooked on the first restricting member 12. However, the first cable 9 may be entirely or almost entirely spirally shaped. By configuring in this manner, the first cable 9 can be easily stretched and contracted. As a result, the length of the first cable 9 can be made compact, and the possibility of the first cable 9 being damaged can be reduced. The first cable 9 may be linear and attached by being wound around the first restricting member 12.

[0066] In addition, in this embodiment, the first restricting member 12 is configured to be provided on the front surface of the revolving body 2, but the present invention is not limited to this, and the first restricting member may be configured to be disposed, for example, on the front upper surface of the revolving body 2. In this case, the first restricting member may be shaped to extend straight upward from the upper surface of the revolving body 2. Even in this case, the first cable 9 can be hooked onto the first restricting member.

[0067] In the present embodiment, the first restricting member 12 is configured to restrict the movement of the first cable 9 by hooking and holding the first cable 9, but this is also merely an example. The first restricting member may have a structure that can restrict the movement of the first cable 9, and does not have to have a structure that hooks the first cable 9. For example, the first restricting member may be in the shape of a ring or a tube through which the first cable 9 passes.

[0068] Also, for example, the first restricting member may be configured to clamp the first cable 9 as shown in Fig. 7. In the modified example shown in Fig. 7, the first restricting member 12X has a pair of leaf spring members 121 protruding forward from the front plate member 29. The pair of leaf spring members 121 clamp and hold the first cable 9 by elastic force. Note that Fig. 7 is a horizontal cross-sectional view of the first restricting member 12X clamping the first cable 9.

[0069] In this embodiment, at least one second restricting member 13 that restricts the movement of the first cable 9 is disposed in the soil removal device 4. By providing the second restricting member 13, it is possible to suppress the first cable 9 from being violently moved between the first restricting member 12 and the detection device 5 due to the rotation of the rotating body 2.

[0070] Fig. 8 is a schematic perspective view showing the second regulating member 13 arranged on the soil removal device 4 and its surroundings. Fig. 8 is a perspective view seen from above the front. Fig. 8 also shows a state in which the two first cables 9A, 9B are not attached. As shown in Fig. 8, in this embodiment, two second regulating members 13 are arranged on the soil removal device 4. Note that, since it is sufficient for the second regulating members 13 to be able to suppress the first cables 9 from swinging wildly due to the rotation of the rotating body 2, the number of second regulating members 13 may be appropriately changed within the scope of achieving this purpose.

[0071] One of the two second restricting members 13, the second restricting member 13A, is attached to the angle cylinder cover 461 of the angle cylinder 46. More specifically, the second restricting member 13A has a base plate 131A attached to the angle cylinder cover 461 and a restricting portion 132A attached to the base plate 131A. The restricting portion 132A has a rod-shaped portion 132Aa fixed to the base plate 131A and an annular portion 132Ab connected to the rod-shaped portion 132Aa. The annular portion 132Ab penetrates in the front-rear direction.

[0072] The other of the two second restricting members 13, a second restricting member 13B, is attached to the tilt cylinder cover 441. More specifically, the second restricting member 13B has a base plate 131B attached to the tilt cylinder cover 441 and a restricting portion 132B attached to the base plate 131B. The restricting portion 132B has a rod-shaped portion 132Ba fixed to the base plate 131B and an annular portion 132Bb connected to the rod-shaped portion 132Ba. The annular portion 132Bb penetrates in the front-rear direction.

[0073] FIG. 9 is a diagram showing a state in which two first cables 9A and 9B are attached to the configuration shown in FIG. 8. As shown in FIG. 9, the first cable for prism 9A is passed through the annular portions 132Ab and 132Bb of the two second regulating members 13A and 13B. That is, the first cable for prism 9A is guided from the relay unit 11 to the first regulating member for prism cable 12A as well as the two second regulating members 13A and 13B and connected to the prism 51. On the other hand, the first cable for tilt sensor 9B is passed through the annular portion 132Ab of one second regulating member 13A. That is, the first cable for tilt sensor 9B is guided from the relay unit 11 to the first regulating member for tilt sensor cable 12B as well as the one second regulating member 13A and connected to the tilt sensor 52.

[0074] According to this configuration, regardless of whether the rotating body 2 rotates to the left or right, the first cable for the prism 9A and the first cable for the tilt sensor 9B can be prevented from being moved wildly due to the rotation. In this embodiment, the second restricting member 13A is configured to be shared by the two first cables 9A and 9B, but it may be configured not to be shared. In this case, the number of second restricting members 13 may be increased.

[0075] As described above, in this embodiment, the blade 41 is provided with two base portions 411 on which the support pole 7 to which the prism 51 is attached can be disposed so that the position of the prism 51 can be changed. The backhoe 100 of this embodiment is designed with this point in mind. That is, the soil removal device 4 is provided with a plurality of second regulating member mounting portions 14 that enable the use of the second regulating member 13 that is disposed in different positions according to the change in the attachment of the detection device 5 to the two base portions 411. This makes it possible to prevent the first cable 9 from swinging wildly due to the rotation of the rotating body 2 even when the position of the detection device 5 is changed.

[0076] Fig. 10 is a schematic perspective view showing the configuration of tilt cylinder cover 441 to which second restricting member 13B is attached. Fig. 10 is a perspective view seen from above the front. In order to facilitate understanding, Fig. 10 also shows bolts required for attaching tilt cylinder cover 441 to other members.

[0077] 10, the tilt cylinder cover 441 is provided with two second regulating member mounting portions 14A, 14B that enable the use of the second regulating member 13B that is placed in different positions according to the replacement of the prism 51 with respect to the two base portions 411. One second regulating member mounting portion 14A is provided at the left end of the tilt cylinder cover 441, and the other second regulating member mounting portion 14B is provided at the center of the tilt cylinder cover 441 in the left-right direction.

[0078] In detail, each of the second restricting member mounting portions 14A and 14B is configured with a hole for a bolt required for mounting the base plate 131B. Note that, if the method of mounting the second restricting member 13B to the tilt cylinder cover 441 is different from the method of this embodiment, the second restricting member mounting portions 14 do not need to be holes for bolts.

[0079] When the position of the support 7 to which the prism 51 is attached is moved from the left side to the right side in FIG. 9, the position to which the second regulating member 13B is attached is changed. Specifically, the second regulating member 13B is changed from a state in which the base plate 131B is attached to the second regulating member attachment portion 14A by using a bolt to a state in which the base plate 131B is attached to the second regulating member attachment portion 14B by using a bolt. In this embodiment, when the base plate 131B is attached to the second regulating member attachment portion 14B, the annular portion 132Bb is disposed so as to penetrate in the left-right direction. Such a change in the direction of the annular portion 132Bb may be appropriately performed in consideration of the ease of guiding the first cable 9 to the detection device 5, etc.

[0080] In this embodiment, the location of the second regulating member 13B is changed in response to changing the location of the support 7, but the two second regulating members may be attached in advance to both of the two second regulating member attachment parts 14A, 14B. In addition, in this embodiment, the second regulating member attachment parts 14A, 14B are provided on the tilt cylinder cover 441, but this is merely an example and the second regulating members may be provided on a part other than the tilt cylinder cover 441. In addition, in this embodiment, the case where the position of the second regulating member 13B is changed is exemplified, but the position of the second regulating member 13A may also be changed, for example.

[0081] <5. Notes> Various technical features disclosed in this specification may be modified in various ways without departing from the spirit of the technical creation. Furthermore, multiple embodiments and modifications shown in this specification may be combined to the extent possible. [Explanation of symbols]

[0082] 1. Running body 2. Rotating body 3. Working device 4...Earth removal equipment 5. Detection device 8. Control device 9. First cable 10...Second cable 11 Relay section 12...First restricting member 13...Second restricting member 14...Second restriction member mounting portion 24...Installation section 41...Earth removal board 91···First connector (connector) 100···Backhoe (construction machinery) 111... Support member 112... Holding member 411... Base part

Claims

1. A traveling body capable of moving straight forward and backward; A blade-type earth removal device is disposed in front of the traveling body; A rotating body rotatably mounted on the traveling body; A working device installed on an installation portion of the rotating body; A detection device attached to the blade and detecting information related to the blade; A control device disposed on the rotating body; a first cable having one end connected to the detection device; a second cable having one end connected to the controller; a relay unit disposed on the rotating body and connecting the other end of the first cable to the other end of the second cable; a first restricting member that is disposed on the rotating body and restricts movement of the first cable extending from the relay portion; Equipped with A construction machine, wherein the first restricting member is positioned below the relay portion.

2. When viewed from the front-to-rear direction of the rotating body in a plan view in which the installation portion is disposed forward facing the front, The construction machine according to claim 1 , wherein the first restricting member is disposed between the installation portion and the relay portion in the left-right direction.

3. In a plan view from the up-down direction of the rotating body disposed in front, The construction machine according to claim 2 , wherein the connector provided at the other end of the first cable is disposed at an angle with respect to the front-rear direction and extends from the relay portion toward the installation portion.

4. The construction machine according to claim 1 , wherein the first cable is hooked onto the first restricting member.

5. The construction machine according to claim 4 , wherein the first restricting member is L-shaped with a tip portion facing upward.

6. The construction machine according to claim 1 , wherein at least one second restricting member that restricts movement of the first cable is disposed in the earth removal device.

7. The blade has a base portion on both the left and right sides of a center in a left-right direction, to which the detection device is detachably attached, The construction machine according to claim 6, wherein the soil removal device is provided with a plurality of mounting portions for the second regulating member that enable the use of the second regulating member that is positioned in different positions depending on the attachment of the detection device to the two base portions.

8. The relay unit includes: A support member extending upward from an upper surface of the rotating body at a front of the rotating body, the support member being disposed forward such that the installation portion faces forward; a holding member attached to the support member and holding a connector provided at the other end of the second cable; The construction machine according to any one of claims 1 to 7, further comprising:

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